Attribute.GetCustomAttributes Attribute.GetCustomAttributes Attribute.GetCustomAttributes Attribute.GetCustomAttributes Method

Definition

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly, ein Modul, einen Typmember oder einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to an assembly, module, type member, or method parameter.

Überlädt

GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the module, and the type of the custom attribute to search for.

GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Methodenparameters gesucht werden sollen.Parameters specify the method parameter, the type of the custom attribute to search for, and whether to search ancestors of the method parameter.

GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und den Typ des zu suchenden benutzerdefinierten Attributs und eine ignorierte Suchoption an.Parameters specify the module, the type of the custom attribute to search for, and an ignored search option.

GetCustomAttributes(MemberInfo, Type, Boolean) GetCustomAttributes(MemberInfo, Type, Boolean) GetCustomAttributes(MemberInfo, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Members gesucht werden sollen.Parameters specify the member, the type of the custom attribute to search for, and whether to search ancestors of the member.

GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und den Typ des zu suchenden benutzerdefinierten Attributs und eine ignorierte Suchoption an.Parameters specify the assembly, the type of the custom attribute to search for, and an ignored search option.

GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the method parameter, and the type of the custom attribute to search for.

GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und eine ignorierte Suchoption an.Parameters specify the module, and an ignored search option.

GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter an, und außerdem, ob frühere Versionen des Methodenparameters gesucht werden sollen.Parameters specify the method parameter, and whether to search ancestors of the method parameter.

GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Members gesucht werden sollen.Parameters specify the member, the type of the custom attribute to search for, and whether to search ancestors of the member.

GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the assembly, and the type of the custom attribute to search for.

GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und eine ignorierte Suchoption an.Parameters specify the assembly, and an ignored search option.

GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Ein Parameter gibt den Methodenparameter an.A parameter specifies the method parameter.

GetCustomAttributes(Module) GetCustomAttributes(Module) GetCustomAttributes(Module) GetCustomAttributes(Module)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Ein Parameter gibt das Modul an.A parameter specifies the module.

GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Ein Parameter gibt den Member an.A parameter specifies the member.

GetCustomAttributes(Assembly) GetCustomAttributes(Assembly) GetCustomAttributes(Assembly) GetCustomAttributes(Assembly)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Ein Parameter gibt die Assembly an.A parameter specifies the assembly.

GetCustomAttributes(MemberInfo, Type) GetCustomAttributes(MemberInfo, Type) GetCustomAttributes(MemberInfo, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the member, and the type of the custom attribute to search for.

GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type) GetCustomAttributes(Module, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the module, and the type of the custom attribute to search for.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Module ^ element, Type ^ attributeType);
public static Attribute[] GetCustomAttributes (System.Reflection.Module element, Type attributeType);
static member GetCustomAttributes : System.Reflection.Module * Type -> Attribute[]
Public Shared Function GetCustomAttributes (element As Module, attributeType As Type) As Attribute()

Parameter

element
Module Module Module Module

Ein Objekt, das von der Module-Klasse abgeleitet wurde und eine übertragbare ausführbare Datei (Portable Executable, PE) beschreibt.An object derived from the Module class that describes a portable executable file.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine Module als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a Module as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

// Assign some attributes to the module.
// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:Description("A sample description")];
[module:CLSCompliant(false)];
namespace CustAttrs2CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {
         Type^ clsType = DemoClass::typeid;

         // Get the Module type to access its metadata.
         Module^ module = clsType->Module;

         // Iterate through all the attributes for the module.
         System::Collections::IEnumerator^ myEnum1 = Attribute::GetCustomAttributes( module )->GetEnumerator();
         while ( myEnum1->MoveNext() )
         {
            Attribute^ attr = safe_cast<Attribute^>(myEnum1->Current);

            // Check for the Description attribute.
            if ( attr->GetType() == DescriptionAttribute::typeid )
                        Console::WriteLine( "Module {0} has the description \"{1}\".", module->Name, (dynamic_cast<DescriptionAttribute^>(attr))->Description );
            // Check for the CLSCompliant attribute.
            else

            // Check for the CLSCompliant attribute.
            if ( attr->GetType() == CLSCompliantAttribute::typeid )
                        Console::WriteLine( "Module {0} {1} CLSCompliant.", module->Name, (dynamic_cast<CLSCompliantAttribute^>(attr))->IsCompliant ? (String^)"is" : "is not" );
         }
      }
   };
}


/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
using System;
using System.Reflection;
using System.ComponentModel;

// Assign some attributes to the module.
[module:Description("A sample description")]

// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:CLSCompliant(false)]

namespace CustAttrs2CS {
    class DemoClass {
        static void Main(string[] args) {
            Type clsType = typeof(DemoClass);
            // Get the Module type to access its metadata.
            Module module = clsType.Module;

            // Iterate through all the attributes for the module.
            foreach(Attribute attr in Attribute.GetCustomAttributes(module)) {
                // Check for the Description attribute.
                if (attr.GetType() == typeof(DescriptionAttribute))
                    Console.WriteLine("Module {0} has the description " +
                        "\"{1}\".", module.Name, 
                        ((DescriptionAttribute)attr).Description);
                // Check for the CLSCompliant attribute.
                else if (attr.GetType() == typeof(CLSCompliantAttribute))
                    Console.WriteLine("Module {0} {1} CLSCompliant.",
                        module.Name,
                        ((CLSCompliantAttribute)attr).IsCompliant ? 
                            "is" : "is not");
            }
        }
    }
}

/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

' Give the Module some attributes.
<Module: Description("A sample description")> 

' Make the CLSCompliant attribute False.
' The CLSCompliant attribute is applicable for /target:module.
<Module: CLSCompliant(False)> 

Module DemoModule

    Sub Main()
        ' Get the Module type to access its metadata.
        Dim modType As Reflection.Module = GetType(DemoModule).Module
        Dim attr As Attribute
        ' Iterate through all the attributes for the module.
        For Each attr In Attribute.GetCustomAttributes(modType)
            ' Check for the Description attribute.
            If TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Module {0} has the description ""{1}"".", _
                    modType.Name, descAttr.Description)

            ' Check for the CLSCompliant attribute.
            ElseIf TypeOf attr Is CLSCompliantAttribute Then
                ' Convert the attribute to access its data.
                Dim CLSCompAttr As CLSCompliantAttribute = _
                    CType(attr, CLSCompliantAttribute)
                Dim strCompliant As String
                If CLSCompAttr.IsCompliant Then
                    strCompliant = "is"
                Else
                    strCompliant = "is not"
                End If
                Console.WriteLine("Module {0} {1} CLSCompliant.", _
                    modType.Name, strCompliant)
            End If
        Next
    End Sub
End Module

' Output:
' Module CustAttrs2VB.exe has the description "A sample description".
' Module CustAttrs2VB.exe is not CLSCompliant.

GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean) GetCustomAttributes(ParameterInfo, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Methodenparameters gesucht werden sollen.Parameters specify the method parameter, the type of the custom attribute to search for, and whether to search ancestors of the method parameter.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::ParameterInfo ^ element, Type ^ attributeType, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element, Type attributeType, bool inherit);
static member GetCustomAttributes : System.Reflection.ParameterInfo * Type * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As ParameterInfo, attributeType As Type, inherit As Boolean) As Attribute()

Parameter

element
ParameterInfo ParameterInfo ParameterInfo ParameterInfo

Ein Objekt, das von der ParameterInfo-Klasse abgeleitet wurde und einen Parameter eines Klassenmembers beschreibt.An object derived from the ParameterInfo class that describes a parameter of a member of a class.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

inherit
Boolean Boolean Boolean Boolean

Wenn true, wird angegeben, dass auch die früheren Versionen von element hinsichtlich benutzerdefinierter Attribute durchsucht werden sollen.If true, specifies to also search the ancestors of element for custom attributes.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine ParameterInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a ParameterInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

namespace CustAttrs5CS
{
   public ref class AClass
   {
   public:
      void ParamArrayAndDesc(
         // Add ParamArray and Description attributes.
         [Description("This argument is a ParamArray")]
         array<Int32>^args )
      {}
   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the method.
         MethodInfo^ mInfo = clsType->GetMethod( "ParamArrayAndDesc" );
         if ( mInfo != nullptr )
         {
            // Get the parameter information.
            array<ParameterInfo^>^pInfo = mInfo->GetParameters();
            if ( pInfo != nullptr )
            {
               // Iterate through all the attributes for the parameter.
               System::Collections::IEnumerator^ myEnum4 = Attribute::GetCustomAttributes( pInfo[ 0 ] )->GetEnumerator();
               while ( myEnum4->MoveNext() )
               {
                  Attribute^ attr = safe_cast<Attribute^>(myEnum4->Current);

                  // Check for the ParamArray attribute.
                  if ( attr->GetType() == ParamArrayAttribute::typeid )
                                    Console::WriteLine( "Parameter {0} for method {1} "
                  "has the ParamArray attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                  // Check for the Description attribute.
                  else

                  // Check for the Description attribute.
                  if ( attr->GetType() == DescriptionAttribute::typeid )
                  {
                     Console::WriteLine( "Parameter {0} for method {1} "
                     "has a description attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                     Console::WriteLine( "The description is: \"{0}\"", (dynamic_cast<DescriptionAttribute^>(attr))->Description );
                  }
               }
            }
         }
      }
   };
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
using System;
using System.Reflection;
using System.ComponentModel;

namespace CustAttrs5CS {
    public class AClass {
        public void ParamArrayAndDesc(
            // Add ParamArray (with the keyword) and Description attributes.
            [Description("This argument is a ParamArray")]
            params int[] args)
        {}
    }

    class DemoClass {
        static void Main(string[] args) {
            // Get the Class type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for the method.
            MethodInfo mInfo = clsType.GetMethod("ParamArrayAndDesc");
            if (mInfo != null) {
                // Get the parameter information.
                ParameterInfo[] pInfo = mInfo.GetParameters();
                if (pInfo != null) {
                    // Iterate through all the attributes for the parameter.
                    foreach(Attribute attr in 
                        Attribute.GetCustomAttributes(pInfo[0])) {
                        // Check for the ParamArray attribute.
                        if (attr.GetType() == typeof(ParamArrayAttribute))
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has the ParamArray attribute.",
                                pInfo[0].Name, mInfo.Name);
                        // Check for the Description attribute.
                        else if (attr.GetType() == 
                            typeof(DescriptionAttribute)) {
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has a description attribute.",
                                pInfo[0].Name, mInfo.Name);
                            Console.WriteLine("The description is: \"{0}\"",
                                ((DescriptionAttribute)attr).Description);
                        }
                    }
                }
            }
        }
    }
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

Module DemoModule
    Public Class AClass
        ' Add Description and ParamArray (with the keyword) attributes.
        Public Sub ParamArrayAndDesc( _
            <Description("This argument is a ParamArray")> _
            ByVal ParamArray args() As Integer)
        End Sub
    End Class

    Sub Main()
        ' Get the Class type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for the method.
        Dim mInfo As MethodInfo = clsType.GetMethod("ParamArrayAndDesc")
        ' Get the Parameter information for the method.
        Dim pInfo() As ParameterInfo = mInfo.GetParameters()
        Dim attr As Attribute
        ' Iterate through each attribute of the parameter.
        For Each attr In Attribute.GetCustomAttributes(pInfo(0))
            ' Check for the ParamArray attribute.
            If TypeOf attr Is ParamArrayAttribute Then
                ' Convert the attribute to access its data.
                Dim paAttr As ParamArrayAttribute = _
                    CType(attr, ParamArrayAttribute)
                Console.WriteLine("Parameter {0} has the " + _
                    "ParamArray attribute.", pInfo(0).Name)
            ' Check for the Description attribute.
            ElseIf TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Parameter {0} has a description " + _
                    "attribute. The description is:", pInfo(0).Name)
                Console.WriteLine(descAttr.Description)
            End If
        Next
    End Sub
End Module

' Output:
' Parameter args has a description attribute. The description is:
' This argument is a ParamArray
' Parameter args has the ParamArray attribute.

Hinweise

Wenn element stellt einen Parameter in einer Methode eines abgeleiteten Typs, der Rückgabewert enthält die vererbbaren benutzerdefinierten Attribute, die auf den gleichen Parameter in der überschriebenen Basismethoden angewendet.If element represents a parameter in a method of a derived type, the return value includes the inheritable custom attributes applied to the same parameter in the overridden base methods.

GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean) GetCustomAttributes(Module, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und den Typ des zu suchenden benutzerdefinierten Attributs und eine ignorierte Suchoption an.Parameters specify the module, the type of the custom attribute to search for, and an ignored search option.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Module ^ element, Type ^ attributeType, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.Module element, Type attributeType, bool inherit);
static member GetCustomAttributes : System.Reflection.Module * Type * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As Module, attributeType As Type, inherit As Boolean) As Attribute()

Parameter

element
Module Module Module Module

Ein Objekt, das von der Module-Klasse abgeleitet wurde und eine übertragbare ausführbare Datei (Portable Executable, PE) beschreibt.An object derived from the Module class that describes a portable executable file.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

inherit
Boolean Boolean Boolean Boolean

Dieser Parameter wird ignoriert und wirkt sich nicht auf die Funktionsweise dieser Methode aus.This parameter is ignored, and does not affect the operation of this method.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine Module als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a Module as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

// Assign some attributes to the module.
// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:Description("A sample description")];
[module:CLSCompliant(false)];
namespace CustAttrs2CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {
         Type^ clsType = DemoClass::typeid;

         // Get the Module type to access its metadata.
         Module^ module = clsType->Module;

         // Iterate through all the attributes for the module.
         System::Collections::IEnumerator^ myEnum1 = Attribute::GetCustomAttributes( module )->GetEnumerator();
         while ( myEnum1->MoveNext() )
         {
            Attribute^ attr = safe_cast<Attribute^>(myEnum1->Current);

            // Check for the Description attribute.
            if ( attr->GetType() == DescriptionAttribute::typeid )
                        Console::WriteLine( "Module {0} has the description \"{1}\".", module->Name, (dynamic_cast<DescriptionAttribute^>(attr))->Description );
            // Check for the CLSCompliant attribute.
            else

            // Check for the CLSCompliant attribute.
            if ( attr->GetType() == CLSCompliantAttribute::typeid )
                        Console::WriteLine( "Module {0} {1} CLSCompliant.", module->Name, (dynamic_cast<CLSCompliantAttribute^>(attr))->IsCompliant ? (String^)"is" : "is not" );
         }
      }
   };
}


/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
using System;
using System.Reflection;
using System.ComponentModel;

// Assign some attributes to the module.
[module:Description("A sample description")]

// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:CLSCompliant(false)]

namespace CustAttrs2CS {
    class DemoClass {
        static void Main(string[] args) {
            Type clsType = typeof(DemoClass);
            // Get the Module type to access its metadata.
            Module module = clsType.Module;

            // Iterate through all the attributes for the module.
            foreach(Attribute attr in Attribute.GetCustomAttributes(module)) {
                // Check for the Description attribute.
                if (attr.GetType() == typeof(DescriptionAttribute))
                    Console.WriteLine("Module {0} has the description " +
                        "\"{1}\".", module.Name, 
                        ((DescriptionAttribute)attr).Description);
                // Check for the CLSCompliant attribute.
                else if (attr.GetType() == typeof(CLSCompliantAttribute))
                    Console.WriteLine("Module {0} {1} CLSCompliant.",
                        module.Name,
                        ((CLSCompliantAttribute)attr).IsCompliant ? 
                            "is" : "is not");
            }
        }
    }
}

/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

' Give the Module some attributes.
<Module: Description("A sample description")> 

' Make the CLSCompliant attribute False.
' The CLSCompliant attribute is applicable for /target:module.
<Module: CLSCompliant(False)> 

Module DemoModule

    Sub Main()
        ' Get the Module type to access its metadata.
        Dim modType As Reflection.Module = GetType(DemoModule).Module
        Dim attr As Attribute
        ' Iterate through all the attributes for the module.
        For Each attr In Attribute.GetCustomAttributes(modType)
            ' Check for the Description attribute.
            If TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Module {0} has the description ""{1}"".", _
                    modType.Name, descAttr.Description)

            ' Check for the CLSCompliant attribute.
            ElseIf TypeOf attr Is CLSCompliantAttribute Then
                ' Convert the attribute to access its data.
                Dim CLSCompAttr As CLSCompliantAttribute = _
                    CType(attr, CLSCompliantAttribute)
                Dim strCompliant As String
                If CLSCompAttr.IsCompliant Then
                    strCompliant = "is"
                Else
                    strCompliant = "is not"
                End If
                Console.WriteLine("Module {0} {1} CLSCompliant.", _
                    modType.Name, strCompliant)
            End If
        Next
    End Sub
End Module

' Output:
' Module CustAttrs2VB.exe has the description "A sample description".
' Module CustAttrs2VB.exe is not CLSCompliant.

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element Wenn inherit ist true.The return value contains the custom attributes for ancestors of element if inherit is true.

GetCustomAttributes(MemberInfo, Type, Boolean) GetCustomAttributes(MemberInfo, Type, Boolean) GetCustomAttributes(MemberInfo, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Members gesucht werden sollen.Parameters specify the member, the type of the custom attribute to search for, and whether to search ancestors of the member.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::MemberInfo ^ element, Type ^ type, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element, Type type, bool inherit);
static member GetCustomAttributes : System.Reflection.MemberInfo * Type * bool -> Attribute[]

Parameter

element
MemberInfo MemberInfo MemberInfo MemberInfo

Ein Objekt, das aus der MemberInfo-Klasse abgeleitet wurde und einen Konstruktor-, Ereignis-, Feld-, Methoden- oder Eigenschaftenmember einer Klasse beschreibt.An object derived from the MemberInfo class that describes a constructor, event, field, method, or property member of a class.

type
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

inherit
Boolean Boolean Boolean Boolean

Wenn true, wird angegeben, dass auch die früheren Versionen von element hinsichtlich benutzerdefinierter Attribute durchsucht werden sollen.If true, specifies to also search the ancestors of element for custom attributes.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ type, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type type applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder type ist null.element or type is null.

type ist nicht von Attribute abgeleitet.type is not derived from Attribute.

element ist kein Konstruktor, keine Methode, keine Eigenschaft, kein Ereignis, kein Typ und kein Feld.element is not a constructor, method, property, event, type, or field.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine MemberInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a MemberInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::Security;
using namespace System::Runtime::InteropServices;

namespace CustAttrs4CS
{
   // Create a class for Win32 imported unmanaged functions.
   public ref class Win32
   {
   public:

      [DllImport("user32.dll", CharSet = CharSet::Unicode)]
      static int MessageBox( int hWnd, String^ text, String^ caption, UInt32 type );
   };

   public ref class AClass
   {
   public:

      // Add some attributes to the Win32CallMethod.

      [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
      void Win32CallMethod()
      {
         Win32::MessageBox( 0, "This is an unmanaged call.", "Be Careful!", 0 );
      }

   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the Win32CallMethod.
         MethodInfo^ mInfo = clsType->GetMethod( "Win32CallMethod" );
         if ( mInfo != nullptr )
         {
            // Iterate through all the attributes for the method.
            System::Collections::IEnumerator^ myEnum3 = Attribute::GetCustomAttributes( mInfo )->GetEnumerator();
            while ( myEnum3->MoveNext() )
            {
               Attribute^ attr = safe_cast<Attribute^>(myEnum3->Current);

               // Check for the Obsolete attribute.
               if ( attr->GetType() == ObsoleteAttribute::typeid )
               {
                  Console::WriteLine( "Method {0} is obsolete. "
                  "The message is:", mInfo->Name );
                  Console::WriteLine( (dynamic_cast<ObsoleteAttribute^>(attr))->Message );
               }
               // Check for the SuppressUnmanagedCodeSecurity attribute.
               else

               // Check for the SuppressUnmanagedCodeSecurity attribute.
               if ( attr->GetType() == SuppressUnmanagedCodeSecurityAttribute::typeid )
               {
                  Console::WriteLine( "This method calls unmanaged code "
                  "with no security check." );
                  Console::WriteLine( "Please do not use unless absolutely necessary." );
                  AClass^ myCls = gcnew AClass;
                  myCls->Win32CallMethod();
               }
            }
         }
      }
   };
}


/*
 * Output:
 * Method Win32CallMethod is obsolete. The message is:
 * This method is obsolete. Use managed MsgBox instead.
 * This method calls unmanaged code with no security check.
 * Please do not use unless absolutely necessary.
 */
using System;
using System.Reflection;
using System.Security;
using System.Runtime.InteropServices;

namespace CustAttrs4CS
{

    // Define an enumeration of Win32 unmanaged types
    public enum UnmanagedType
    {
        User,
        GDI,
        Kernel,
        Shell,
        Networking,
        Multimedia
    }

    // Define the Unmanaged attribute.
    public class UnmanagedAttribute : Attribute
    {
        // Storage for the UnmanagedType value.
        protected UnmanagedType thisType;

        // Set the unmanaged type in the constructor.
        public UnmanagedAttribute(UnmanagedType type)
        {
            thisType = type;
        }

        // Define a property to get and set the UnmanagedType value.
        public UnmanagedType Win32Type
        {
            get { return thisType; }
            set { thisType = Win32Type; }
        }
    }

    // Create a class for an imported Win32 unmanaged function.
    public class Win32 {
        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        public static extern int MessageBox(int hWnd, String text,
            String caption, uint type);
    }

    public class AClass {
        // Add some attributes to Win32CallMethod.
        [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
        [Unmanaged(UnmanagedType.User)]
        public void Win32CallMethod()
        {
            Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0);
        }
    }

    class DemoClass {
        static void Main(string[] args)
            {
            // Get the AClass type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for Win32CallMethod.
            MethodInfo mInfo = clsType.GetMethod("Win32CallMethod");
            if (mInfo != null)
            {
                // Iterate through all the attributes of the method.
                foreach(Attribute attr in
                    Attribute.GetCustomAttributes(mInfo)) {
                    // Check for the Obsolete attribute.
                    if (attr.GetType() == typeof(ObsoleteAttribute))
                    {
                        Console.WriteLine("Method {0} is obsolete. " +
                            "The message is:",
                            mInfo.Name);
                        Console.WriteLine("  \"{0}\"",
                            ((ObsoleteAttribute)attr).Message);
                    }

                    // Check for the Unmanaged attribute.
                    else if (attr.GetType() == typeof(UnmanagedAttribute))
                    {
                        Console.WriteLine(
                            "This method calls unmanaged code.");
                        Console.WriteLine(
                            String.Format("The Unmanaged attribute type is {0}.",
                                          ((UnmanagedAttribute)attr).Win32Type));
                        AClass myCls = new AClass();
                        myCls.Win32CallMethod();
                    }
                }
            }
        }
    }
}

/*

This code example produces the following results.

First, the compilation yields the warning, "...This method is
obsolete. Use managed MsgBox instead."
Second, execution yields a message box with a title of "Caution!"
and message text of "This is an unmanaged call."
Third, the following text is displayed in the console window:

Method Win32CallMethod is obsolete. The message is:
  "This method is obsolete. Use managed MsgBox instead."
This method calls unmanaged code.
The Unmanaged attribute type is User.

*/

Imports System
Imports System.Reflection
Imports System.Security
Imports System.Runtime.InteropServices

' Define an enumeration of Win32 unmanaged types
Public Enum UnmanagedType
    User
    GDI
    Kernel
    Shell
    Networking
    Multimedia
End Enum 'UnmanagedType

' Define the Unmanaged attribute.
Public Class UnmanagedAttribute 
             Inherits Attribute

    ' Storage for the UnmanagedType value.
    Protected thisType As UnmanagedType
    
    ' Set the unmanaged type in the constructor.
    Public Sub New(ByVal type As UnmanagedType) 
        thisType = type
    End Sub 'New
    
    ' Define a property to get and set the UnmanagedType value.
    Public Property Win32Type() As UnmanagedType 
        Get
            Return thisType
        End Get
        Set
            thisType = Win32Type
        End Set
    End Property
End Class 'UnmanagedAttribute 

' Create a class for an imported Win32 unmanaged function.
Public Class Win32
    <DllImport("user32.dll", CharSet:=CharSet.Unicode)> _
    Public Shared Function MessageBox(ByVal hWnd As Integer, _
                                      ByVal Text As String, _
                                      ByVal caption As String, _
                                      ByVal type As Integer) As Integer
    End Function 'MessageBox
End Class 'Win32

Public Class AClass
    ' Add some attributes to Win32CallMethod.
    <Obsolete("This method is obsolete. Use managed MsgBox instead."), _
     Unmanaged(UnmanagedType.User)>  _
    Public Sub Win32CallMethod() 
        Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0)    
    End Sub 'Win32CallMethod
End Class 'AClass

Class DemoClass
    Shared Sub Main(ByVal args() As String) 
        ' Get the AClass type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for Win32CallMethod.
        Dim mInfo As MethodInfo = clsType.GetMethod("Win32CallMethod")
        If Not (mInfo Is Nothing) Then
            ' Iterate through all the attributes of the method.
            Dim attr As Attribute
            For Each attr In  Attribute.GetCustomAttributes(mInfo)
                ' Check for the Obsolete attribute.
                If attr.GetType().Equals(GetType(ObsoleteAttribute)) Then
                    Console.WriteLine("Method {0} is obsolete. The message is:", mInfo.Name)
                    Console.WriteLine("  ""{0}""", CType(attr, ObsoleteAttribute).Message)
                ' Check for the Unmanaged attribute.
                ElseIf attr.GetType().Equals(GetType(UnmanagedAttribute)) Then
                    Console.WriteLine("This method calls unmanaged code.")
                    Console.WriteLine( _
                            String.Format("The Unmanaged attribute type is {0}.", _
                            CType(attr, UnmanagedAttribute).Win32Type))
                    Dim myCls As New AClass()
                    myCls.Win32CallMethod()
                End If
            Next attr
        End If
    End Sub 'Main
End Class 'DemoClass

'
'This code example produces the following results. 
'
'First, the compilation yields the warning, "...This method is 
'obsolete. Use managed MsgBox instead."
'Second, execution yields a message box with a title of "Caution!" 
'and message text of "This is an unmanaged call." 
'Third, the following text is displayed in the console window:
'
'Method Win32CallMethod is obsolete. The message is:
'  "This method is obsolete. Use managed MsgBox instead."
'This method calls unmanaged code.
'The Unmanaged attribute type is User.
' 

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element Wenn inherit ist true.The return value contains the custom attributes for ancestors of element if inherit is true.

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode für Methoden, Konstruktoren und Typen von Sicherheitsattributen zurück, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean) GetCustomAttributes(Assembly, Type, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und den Typ des zu suchenden benutzerdefinierten Attributs und eine ignorierte Suchoption an.Parameters specify the assembly, the type of the custom attribute to search for, and an ignored search option.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Assembly ^ element, Type ^ attributeType, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element, Type attributeType, bool inherit);
static member GetCustomAttributes : System.Reflection.Assembly * Type * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As Assembly, attributeType As Type, inherit As Boolean) As Attribute()

Parameter

element
Assembly Assembly Assembly Assembly

Ein Objekt, das aus der Assembly-Klasse abgeleitet wurde, die eine wiederverwendbare Auflistung von Modulen beschreibt.An object derived from the Assembly class that describes a reusable collection of modules.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

inherit
Boolean Boolean Boolean Boolean

Dieser Parameter wird ignoriert und wirkt sich nicht auf die Funktionsweise dieser Methode aus.This parameter is ignored, and does not affect the operation of this method.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei ein Assembly als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking an Assembly as a parameter.

using namespace System;
using namespace System::Reflection;

[assembly:AssemblyTitle("CustAttrs1CPP")];
[assembly:AssemblyDescription("GetCustomAttributes() Demo")];
[assembly:AssemblyCompany("Microsoft")];

ref class Example
{};

static void main()
{
    Type^ clsType = Example::typeid;

    // Get the Assembly type to access its metadata.
    Assembly^ assy = clsType->Assembly;

    // Iterate through the attributes for the assembly.
    System::Collections::IEnumerator^ myEnum = Attribute::GetCustomAttributes( assy )->GetEnumerator();
    while ( myEnum->MoveNext() )
    {
       Attribute^ attr = safe_cast<Attribute^>(myEnum->Current);

       // Check for the AssemblyTitle attribute.
       if ( attr->GetType() == AssemblyTitleAttribute::typeid )
          Console::WriteLine( "Assembly title is \"{0}\".", (dynamic_cast<AssemblyTitleAttribute^>(attr))->Title );
          // Check for the AssemblyDescription attribute.
       else
          // Check for the AssemblyDescription attribute.
          if ( attr->GetType() == AssemblyDescriptionAttribute::typeid )
             Console::WriteLine( "Assembly description is \"{0}\".", (dynamic_cast<AssemblyDescriptionAttribute^>(attr))->Description );
          // Check for the AssemblyCompany attribute.
          else if ( attr->GetType() == AssemblyCompanyAttribute::typeid )
             Console::WriteLine( "Assembly company is {0}.", (dynamic_cast<AssemblyCompanyAttribute^>(attr))->Company );
    }
}
// The example displays the following output:
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
//     Assembly title is "CustAttrs1CPP".
using System;
using System.Reflection;

[assembly: AssemblyTitle("CustAttrs1CS")]
[assembly: AssemblyDescription("GetCustomAttributes() Demo")]
[assembly: AssemblyCompany("Microsoft")]

class Example {
    static void Main() {
        // Get the Assembly object to access its metadata.
        Assembly assy = typeof(Example).Assembly;

        // Iterate through the attributes for the assembly.
        foreach(Attribute attr in Attribute.GetCustomAttributes(assy)) {
            // Check for the AssemblyTitle attribute.
            if (attr.GetType() == typeof(AssemblyTitleAttribute))
                Console.WriteLine("Assembly title is \"{0}\".",
                    ((AssemblyTitleAttribute)attr).Title);

            // Check for the AssemblyDescription attribute.
            else if (attr.GetType() == 
                typeof(AssemblyDescriptionAttribute))
                Console.WriteLine("Assembly description is \"{0}\".",
                    ((AssemblyDescriptionAttribute)attr).Description);

            // Check for the AssemblyCompany attribute.
            else if (attr.GetType() == typeof(AssemblyCompanyAttribute))
                Console.WriteLine("Assembly company is {0}.",
                    ((AssemblyCompanyAttribute)attr).Company);
        }
   }
}
// The example displays the following output:
//     Assembly title is "CustAttrs1CS".
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
Imports System.Reflection

<Assembly: AssemblyTitle("CustAttrs1VB")> 
<Assembly: AssemblyDescription("GetCustomAttributes() Demo")> 
<Assembly: AssemblyCompany("Microsoft")> 

Module Example
    Sub Main()
        ' Get the Assembly type to access its metadata.
        Dim assy As Reflection.Assembly = GetType(Example).Assembly

        ' Iterate through all the attributes for the assembly.
        For Each attr As Attribute In Attribute.GetCustomAttributes(assy)
            ' Check for the AssemblyTitle attribute.
            If TypeOf attr Is AssemblyTitleAttribute Then
                ' Convert the attribute to access its data.
                Dim attrTitle As AssemblyTitleAttribute = _
                    CType(attr, AssemblyTitleAttribute)
                Console.WriteLine("Assembly title is ""{0}"".", _
                    attrTitle.Title)

            ' Check for the AssemblyDescription attribute.
            ElseIf TypeOf attr Is AssemblyDescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim attrDesc As AssemblyDescriptionAttribute = _
                    CType(attr, AssemblyDescriptionAttribute)
                Console.WriteLine("Assembly description is ""{0}"".", _
                    attrDesc.Description)

            ' Check for the AssemblyCompany attribute.
            ElseIf TypeOf attr Is AssemblyCompanyAttribute Then
                ' Convert the attribute to access its data.
                Dim attrComp As AssemblyCompanyAttribute = _
                    CType(attr, AssemblyCompanyAttribute)
                Console.WriteLine("Assembly company is {0}.", _
                    attrComp.Company)
            End If
        Next
    End Sub
End Module
' The example displays the following output:
'     Assembly company is Microsoft.
'     Assembly description is "GetCustomAttributes() Demo".
'     Assembly title is "CustAttrs1VB".

Hinweise

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode Sicherheitsattribute aus, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type) GetCustomAttributes(ParameterInfo, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the method parameter, and the type of the custom attribute to search for.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::ParameterInfo ^ element, Type ^ attributeType);
public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element, Type attributeType);
static member GetCustomAttributes : System.Reflection.ParameterInfo * Type -> Attribute[]
Public Shared Function GetCustomAttributes (element As ParameterInfo, attributeType As Type) As Attribute()

Parameter

element
ParameterInfo ParameterInfo ParameterInfo ParameterInfo

Ein Objekt, das von der ParameterInfo-Klasse abgeleitet wurde und einen Parameter eines Klassenmembers beschreibt.An object derived from the ParameterInfo class that describes a parameter of a member of a class.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine ParameterInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a ParameterInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

namespace CustAttrs5CS
{
   public ref class AClass
   {
   public:
      void ParamArrayAndDesc(
         // Add ParamArray and Description attributes.
         [Description("This argument is a ParamArray")]
         array<Int32>^args )
      {}
   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the method.
         MethodInfo^ mInfo = clsType->GetMethod( "ParamArrayAndDesc" );
         if ( mInfo != nullptr )
         {
            // Get the parameter information.
            array<ParameterInfo^>^pInfo = mInfo->GetParameters();
            if ( pInfo != nullptr )
            {
               // Iterate through all the attributes for the parameter.
               System::Collections::IEnumerator^ myEnum4 = Attribute::GetCustomAttributes( pInfo[ 0 ] )->GetEnumerator();
               while ( myEnum4->MoveNext() )
               {
                  Attribute^ attr = safe_cast<Attribute^>(myEnum4->Current);

                  // Check for the ParamArray attribute.
                  if ( attr->GetType() == ParamArrayAttribute::typeid )
                                    Console::WriteLine( "Parameter {0} for method {1} "
                  "has the ParamArray attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                  // Check for the Description attribute.
                  else

                  // Check for the Description attribute.
                  if ( attr->GetType() == DescriptionAttribute::typeid )
                  {
                     Console::WriteLine( "Parameter {0} for method {1} "
                     "has a description attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                     Console::WriteLine( "The description is: \"{0}\"", (dynamic_cast<DescriptionAttribute^>(attr))->Description );
                  }
               }
            }
         }
      }
   };
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
using System;
using System.Reflection;
using System.ComponentModel;

namespace CustAttrs5CS {
    public class AClass {
        public void ParamArrayAndDesc(
            // Add ParamArray (with the keyword) and Description attributes.
            [Description("This argument is a ParamArray")]
            params int[] args)
        {}
    }

    class DemoClass {
        static void Main(string[] args) {
            // Get the Class type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for the method.
            MethodInfo mInfo = clsType.GetMethod("ParamArrayAndDesc");
            if (mInfo != null) {
                // Get the parameter information.
                ParameterInfo[] pInfo = mInfo.GetParameters();
                if (pInfo != null) {
                    // Iterate through all the attributes for the parameter.
                    foreach(Attribute attr in 
                        Attribute.GetCustomAttributes(pInfo[0])) {
                        // Check for the ParamArray attribute.
                        if (attr.GetType() == typeof(ParamArrayAttribute))
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has the ParamArray attribute.",
                                pInfo[0].Name, mInfo.Name);
                        // Check for the Description attribute.
                        else if (attr.GetType() == 
                            typeof(DescriptionAttribute)) {
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has a description attribute.",
                                pInfo[0].Name, mInfo.Name);
                            Console.WriteLine("The description is: \"{0}\"",
                                ((DescriptionAttribute)attr).Description);
                        }
                    }
                }
            }
        }
    }
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

Module DemoModule
    Public Class AClass
        ' Add Description and ParamArray (with the keyword) attributes.
        Public Sub ParamArrayAndDesc( _
            <Description("This argument is a ParamArray")> _
            ByVal ParamArray args() As Integer)
        End Sub
    End Class

    Sub Main()
        ' Get the Class type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for the method.
        Dim mInfo As MethodInfo = clsType.GetMethod("ParamArrayAndDesc")
        ' Get the Parameter information for the method.
        Dim pInfo() As ParameterInfo = mInfo.GetParameters()
        Dim attr As Attribute
        ' Iterate through each attribute of the parameter.
        For Each attr In Attribute.GetCustomAttributes(pInfo(0))
            ' Check for the ParamArray attribute.
            If TypeOf attr Is ParamArrayAttribute Then
                ' Convert the attribute to access its data.
                Dim paAttr As ParamArrayAttribute = _
                    CType(attr, ParamArrayAttribute)
                Console.WriteLine("Parameter {0} has the " + _
                    "ParamArray attribute.", pInfo(0).Name)
            ' Check for the Description attribute.
            ElseIf TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Parameter {0} has a description " + _
                    "attribute. The description is:", pInfo(0).Name)
                Console.WriteLine(descAttr.Description)
            End If
        Next
    End Sub
End Module

' Output:
' Parameter args has a description attribute. The description is:
' This argument is a ParamArray
' Parameter args has the ParamArray attribute.

Hinweise

Wenn element stellt einen Parameter in einer Methode eines abgeleiteten Typs, der Rückgabewert enthält die vererbbaren benutzerdefinierten Attribute, die auf den gleichen Parameter in der überschriebenen Basismethoden angewendet.If element represents a parameter in a method of a derived type, the return value includes the inheritable custom attributes applied to the same parameter in the overridden base methods.

GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean) GetCustomAttributes(Module, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Parameter geben das Modul und eine ignorierte Suchoption an.Parameters specify the module, and an ignored search option.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Module ^ element, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.Module element, bool inherit);
static member GetCustomAttributes : System.Reflection.Module * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As Module, inherit As Boolean) As Attribute()

Parameter

element
Module Module Module Module

Ein Objekt, das von der Module-Klasse abgeleitet wurde und eine übertragbare ausführbare Datei (Portable Executable, PE) beschreibt.An object derived from the Module class that describes a portable executable file.

inherit
Boolean Boolean Boolean Boolean

Dieser Parameter wird ignoriert und wirkt sich nicht auf die Funktionsweise dieser Methode aus.This parameter is ignored, and does not affect the operation of this method.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine Module als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a Module as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

// Assign some attributes to the module.
// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:Description("A sample description")];
[module:CLSCompliant(false)];
namespace CustAttrs2CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {
         Type^ clsType = DemoClass::typeid;

         // Get the Module type to access its metadata.
         Module^ module = clsType->Module;

         // Iterate through all the attributes for the module.
         System::Collections::IEnumerator^ myEnum1 = Attribute::GetCustomAttributes( module )->GetEnumerator();
         while ( myEnum1->MoveNext() )
         {
            Attribute^ attr = safe_cast<Attribute^>(myEnum1->Current);

            // Check for the Description attribute.
            if ( attr->GetType() == DescriptionAttribute::typeid )
                        Console::WriteLine( "Module {0} has the description \"{1}\".", module->Name, (dynamic_cast<DescriptionAttribute^>(attr))->Description );
            // Check for the CLSCompliant attribute.
            else

            // Check for the CLSCompliant attribute.
            if ( attr->GetType() == CLSCompliantAttribute::typeid )
                        Console::WriteLine( "Module {0} {1} CLSCompliant.", module->Name, (dynamic_cast<CLSCompliantAttribute^>(attr))->IsCompliant ? (String^)"is" : "is not" );
         }
      }
   };
}


/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
using System;
using System.Reflection;
using System.ComponentModel;

// Assign some attributes to the module.
[module:Description("A sample description")]

// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:CLSCompliant(false)]

namespace CustAttrs2CS {
    class DemoClass {
        static void Main(string[] args) {
            Type clsType = typeof(DemoClass);
            // Get the Module type to access its metadata.
            Module module = clsType.Module;

            // Iterate through all the attributes for the module.
            foreach(Attribute attr in Attribute.GetCustomAttributes(module)) {
                // Check for the Description attribute.
                if (attr.GetType() == typeof(DescriptionAttribute))
                    Console.WriteLine("Module {0} has the description " +
                        "\"{1}\".", module.Name, 
                        ((DescriptionAttribute)attr).Description);
                // Check for the CLSCompliant attribute.
                else if (attr.GetType() == typeof(CLSCompliantAttribute))
                    Console.WriteLine("Module {0} {1} CLSCompliant.",
                        module.Name,
                        ((CLSCompliantAttribute)attr).IsCompliant ? 
                            "is" : "is not");
            }
        }
    }
}

/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

' Give the Module some attributes.
<Module: Description("A sample description")> 

' Make the CLSCompliant attribute False.
' The CLSCompliant attribute is applicable for /target:module.
<Module: CLSCompliant(False)> 

Module DemoModule

    Sub Main()
        ' Get the Module type to access its metadata.
        Dim modType As Reflection.Module = GetType(DemoModule).Module
        Dim attr As Attribute
        ' Iterate through all the attributes for the module.
        For Each attr In Attribute.GetCustomAttributes(modType)
            ' Check for the Description attribute.
            If TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Module {0} has the description ""{1}"".", _
                    modType.Name, descAttr.Description)

            ' Check for the CLSCompliant attribute.
            ElseIf TypeOf attr Is CLSCompliantAttribute Then
                ' Convert the attribute to access its data.
                Dim CLSCompAttr As CLSCompliantAttribute = _
                    CType(attr, CLSCompliantAttribute)
                Dim strCompliant As String
                If CLSCompAttr.IsCompliant Then
                    strCompliant = "is"
                Else
                    strCompliant = "is not"
                End If
                Console.WriteLine("Module {0} {1} CLSCompliant.", _
                    modType.Name, strCompliant)
            End If
        Next
    End Sub
End Module

' Output:
' Module CustAttrs2VB.exe has the description "A sample description".
' Module CustAttrs2VB.exe is not CLSCompliant.

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element Wenn inherit ist true.The return value contains the custom attributes for ancestors of element if inherit is true.

GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean) GetCustomAttributes(ParameterInfo, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Parameter geben den Methodenparameter an, und außerdem, ob frühere Versionen des Methodenparameters gesucht werden sollen.Parameters specify the method parameter, and whether to search ancestors of the method parameter.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::ParameterInfo ^ element, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element, bool inherit);
static member GetCustomAttributes : System.Reflection.ParameterInfo * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As ParameterInfo, inherit As Boolean) As Attribute()

Parameter

element
ParameterInfo ParameterInfo ParameterInfo ParameterInfo

Ein Objekt, das von der ParameterInfo-Klasse abgeleitet wurde und einen Parameter eines Klassenmembers beschreibt.An object derived from the ParameterInfo class that describes a parameter of a member of a class.

inherit
Boolean Boolean Boolean Boolean

Wenn true, wird angegeben, dass auch die früheren Versionen von element hinsichtlich benutzerdefinierter Attribute durchsucht werden sollen.If true, specifies to also search the ancestors of element for custom attributes.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

Die Member-Eigenschaft von element ist null.The Member property of element is null.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine ParameterInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a ParameterInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

namespace CustAttrs5CS
{
   public ref class AClass
   {
   public:
      void ParamArrayAndDesc(
         // Add ParamArray and Description attributes.
         [Description("This argument is a ParamArray")]
         array<Int32>^args )
      {}
   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the method.
         MethodInfo^ mInfo = clsType->GetMethod( "ParamArrayAndDesc" );
         if ( mInfo != nullptr )
         {
            // Get the parameter information.
            array<ParameterInfo^>^pInfo = mInfo->GetParameters();
            if ( pInfo != nullptr )
            {
               // Iterate through all the attributes for the parameter.
               System::Collections::IEnumerator^ myEnum4 = Attribute::GetCustomAttributes( pInfo[ 0 ] )->GetEnumerator();
               while ( myEnum4->MoveNext() )
               {
                  Attribute^ attr = safe_cast<Attribute^>(myEnum4->Current);

                  // Check for the ParamArray attribute.
                  if ( attr->GetType() == ParamArrayAttribute::typeid )
                                    Console::WriteLine( "Parameter {0} for method {1} "
                  "has the ParamArray attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                  // Check for the Description attribute.
                  else

                  // Check for the Description attribute.
                  if ( attr->GetType() == DescriptionAttribute::typeid )
                  {
                     Console::WriteLine( "Parameter {0} for method {1} "
                     "has a description attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                     Console::WriteLine( "The description is: \"{0}\"", (dynamic_cast<DescriptionAttribute^>(attr))->Description );
                  }
               }
            }
         }
      }
   };
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
using System;
using System.Reflection;
using System.ComponentModel;

namespace CustAttrs5CS {
    public class AClass {
        public void ParamArrayAndDesc(
            // Add ParamArray (with the keyword) and Description attributes.
            [Description("This argument is a ParamArray")]
            params int[] args)
        {}
    }

    class DemoClass {
        static void Main(string[] args) {
            // Get the Class type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for the method.
            MethodInfo mInfo = clsType.GetMethod("ParamArrayAndDesc");
            if (mInfo != null) {
                // Get the parameter information.
                ParameterInfo[] pInfo = mInfo.GetParameters();
                if (pInfo != null) {
                    // Iterate through all the attributes for the parameter.
                    foreach(Attribute attr in 
                        Attribute.GetCustomAttributes(pInfo[0])) {
                        // Check for the ParamArray attribute.
                        if (attr.GetType() == typeof(ParamArrayAttribute))
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has the ParamArray attribute.",
                                pInfo[0].Name, mInfo.Name);
                        // Check for the Description attribute.
                        else if (attr.GetType() == 
                            typeof(DescriptionAttribute)) {
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has a description attribute.",
                                pInfo[0].Name, mInfo.Name);
                            Console.WriteLine("The description is: \"{0}\"",
                                ((DescriptionAttribute)attr).Description);
                        }
                    }
                }
            }
        }
    }
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

Module DemoModule
    Public Class AClass
        ' Add Description and ParamArray (with the keyword) attributes.
        Public Sub ParamArrayAndDesc( _
            <Description("This argument is a ParamArray")> _
            ByVal ParamArray args() As Integer)
        End Sub
    End Class

    Sub Main()
        ' Get the Class type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for the method.
        Dim mInfo As MethodInfo = clsType.GetMethod("ParamArrayAndDesc")
        ' Get the Parameter information for the method.
        Dim pInfo() As ParameterInfo = mInfo.GetParameters()
        Dim attr As Attribute
        ' Iterate through each attribute of the parameter.
        For Each attr In Attribute.GetCustomAttributes(pInfo(0))
            ' Check for the ParamArray attribute.
            If TypeOf attr Is ParamArrayAttribute Then
                ' Convert the attribute to access its data.
                Dim paAttr As ParamArrayAttribute = _
                    CType(attr, ParamArrayAttribute)
                Console.WriteLine("Parameter {0} has the " + _
                    "ParamArray attribute.", pInfo(0).Name)
            ' Check for the Description attribute.
            ElseIf TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Parameter {0} has a description " + _
                    "attribute. The description is:", pInfo(0).Name)
                Console.WriteLine(descAttr.Description)
            End If
        Next
    End Sub
End Module

' Output:
' Parameter args has a description attribute. The description is:
' This argument is a ParamArray
' Parameter args has the ParamArray attribute.

Hinweise

Wenn element stellt einen Parameter in einer Methode eines abgeleiteten Typs, der Rückgabewert enthält die vererbbaren benutzerdefinierten Attribute, die auf den gleichen Parameter in der überschriebenen Basismethoden angewendet.If element represents a parameter in a method of a derived type, the return value includes the inheritable custom attributes applied to the same parameter in the overridden base methods.

GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean) GetCustomAttributes(MemberInfo, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an und außerdem, ob auch frühere Versionen des Members gesucht werden sollen.Parameters specify the member, the type of the custom attribute to search for, and whether to search ancestors of the member.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::MemberInfo ^ element, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element, bool inherit);
static member GetCustomAttributes : System.Reflection.MemberInfo * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As MemberInfo, inherit As Boolean) As Attribute()

Parameter

element
MemberInfo MemberInfo MemberInfo MemberInfo

Ein Objekt, das aus der MemberInfo-Klasse abgeleitet wurde und einen Konstruktor-, Ereignis-, Feld-, Methoden- oder Eigenschaftenmember einer Klasse beschreibt.An object derived from the MemberInfo class that describes a constructor, event, field, method, or property member of a class.

inherit
Boolean Boolean Boolean Boolean

Wenn true, wird angegeben, dass auch die früheren Versionen von element hinsichtlich benutzerdefinierter Attribute durchsucht werden sollen.If true, specifies to also search the ancestors of element for custom attributes.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element ist kein Konstruktor, keine Methode, keine Eigenschaft, kein Ereignis, kein Typ und kein Feld.element is not a constructor, method, property, event, type, or field.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine MemberInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a MemberInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::Security;
using namespace System::Runtime::InteropServices;

namespace CustAttrs4CS
{
   // Create a class for Win32 imported unmanaged functions.
   public ref class Win32
   {
   public:

      [DllImport("user32.dll", CharSet = CharSet::Unicode)]
      static int MessageBox( int hWnd, String^ text, String^ caption, UInt32 type );
   };

   public ref class AClass
   {
   public:

      // Add some attributes to the Win32CallMethod.

      [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
      void Win32CallMethod()
      {
         Win32::MessageBox( 0, "This is an unmanaged call.", "Be Careful!", 0 );
      }

   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the Win32CallMethod.
         MethodInfo^ mInfo = clsType->GetMethod( "Win32CallMethod" );
         if ( mInfo != nullptr )
         {
            // Iterate through all the attributes for the method.
            System::Collections::IEnumerator^ myEnum3 = Attribute::GetCustomAttributes( mInfo )->GetEnumerator();
            while ( myEnum3->MoveNext() )
            {
               Attribute^ attr = safe_cast<Attribute^>(myEnum3->Current);

               // Check for the Obsolete attribute.
               if ( attr->GetType() == ObsoleteAttribute::typeid )
               {
                  Console::WriteLine( "Method {0} is obsolete. "
                  "The message is:", mInfo->Name );
                  Console::WriteLine( (dynamic_cast<ObsoleteAttribute^>(attr))->Message );
               }
               // Check for the SuppressUnmanagedCodeSecurity attribute.
               else

               // Check for the SuppressUnmanagedCodeSecurity attribute.
               if ( attr->GetType() == SuppressUnmanagedCodeSecurityAttribute::typeid )
               {
                  Console::WriteLine( "This method calls unmanaged code "
                  "with no security check." );
                  Console::WriteLine( "Please do not use unless absolutely necessary." );
                  AClass^ myCls = gcnew AClass;
                  myCls->Win32CallMethod();
               }
            }
         }
      }
   };
}


/*
 * Output:
 * Method Win32CallMethod is obsolete. The message is:
 * This method is obsolete. Use managed MsgBox instead.
 * This method calls unmanaged code with no security check.
 * Please do not use unless absolutely necessary.
 */
using System;
using System.Reflection;
using System.Security;
using System.Runtime.InteropServices;

namespace CustAttrs4CS
{

    // Define an enumeration of Win32 unmanaged types
    public enum UnmanagedType
    {
        User,
        GDI,
        Kernel,
        Shell,
        Networking,
        Multimedia
    }

    // Define the Unmanaged attribute.
    public class UnmanagedAttribute : Attribute
    {
        // Storage for the UnmanagedType value.
        protected UnmanagedType thisType;

        // Set the unmanaged type in the constructor.
        public UnmanagedAttribute(UnmanagedType type)
        {
            thisType = type;
        }

        // Define a property to get and set the UnmanagedType value.
        public UnmanagedType Win32Type
        {
            get { return thisType; }
            set { thisType = Win32Type; }
        }
    }

    // Create a class for an imported Win32 unmanaged function.
    public class Win32 {
        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        public static extern int MessageBox(int hWnd, String text,
            String caption, uint type);
    }

    public class AClass {
        // Add some attributes to Win32CallMethod.
        [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
        [Unmanaged(UnmanagedType.User)]
        public void Win32CallMethod()
        {
            Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0);
        }
    }

    class DemoClass {
        static void Main(string[] args)
            {
            // Get the AClass type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for Win32CallMethod.
            MethodInfo mInfo = clsType.GetMethod("Win32CallMethod");
            if (mInfo != null)
            {
                // Iterate through all the attributes of the method.
                foreach(Attribute attr in
                    Attribute.GetCustomAttributes(mInfo)) {
                    // Check for the Obsolete attribute.
                    if (attr.GetType() == typeof(ObsoleteAttribute))
                    {
                        Console.WriteLine("Method {0} is obsolete. " +
                            "The message is:",
                            mInfo.Name);
                        Console.WriteLine("  \"{0}\"",
                            ((ObsoleteAttribute)attr).Message);
                    }

                    // Check for the Unmanaged attribute.
                    else if (attr.GetType() == typeof(UnmanagedAttribute))
                    {
                        Console.WriteLine(
                            "This method calls unmanaged code.");
                        Console.WriteLine(
                            String.Format("The Unmanaged attribute type is {0}.",
                                          ((UnmanagedAttribute)attr).Win32Type));
                        AClass myCls = new AClass();
                        myCls.Win32CallMethod();
                    }
                }
            }
        }
    }
}

/*

This code example produces the following results.

First, the compilation yields the warning, "...This method is
obsolete. Use managed MsgBox instead."
Second, execution yields a message box with a title of "Caution!"
and message text of "This is an unmanaged call."
Third, the following text is displayed in the console window:

Method Win32CallMethod is obsolete. The message is:
  "This method is obsolete. Use managed MsgBox instead."
This method calls unmanaged code.
The Unmanaged attribute type is User.

*/

Imports System
Imports System.Reflection
Imports System.Security
Imports System.Runtime.InteropServices

' Define an enumeration of Win32 unmanaged types
Public Enum UnmanagedType
    User
    GDI
    Kernel
    Shell
    Networking
    Multimedia
End Enum 'UnmanagedType

' Define the Unmanaged attribute.
Public Class UnmanagedAttribute 
             Inherits Attribute

    ' Storage for the UnmanagedType value.
    Protected thisType As UnmanagedType
    
    ' Set the unmanaged type in the constructor.
    Public Sub New(ByVal type As UnmanagedType) 
        thisType = type
    End Sub 'New
    
    ' Define a property to get and set the UnmanagedType value.
    Public Property Win32Type() As UnmanagedType 
        Get
            Return thisType
        End Get
        Set
            thisType = Win32Type
        End Set
    End Property
End Class 'UnmanagedAttribute 

' Create a class for an imported Win32 unmanaged function.
Public Class Win32
    <DllImport("user32.dll", CharSet:=CharSet.Unicode)> _
    Public Shared Function MessageBox(ByVal hWnd As Integer, _
                                      ByVal Text As String, _
                                      ByVal caption As String, _
                                      ByVal type As Integer) As Integer
    End Function 'MessageBox
End Class 'Win32

Public Class AClass
    ' Add some attributes to Win32CallMethod.
    <Obsolete("This method is obsolete. Use managed MsgBox instead."), _
     Unmanaged(UnmanagedType.User)>  _
    Public Sub Win32CallMethod() 
        Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0)    
    End Sub 'Win32CallMethod
End Class 'AClass

Class DemoClass
    Shared Sub Main(ByVal args() As String) 
        ' Get the AClass type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for Win32CallMethod.
        Dim mInfo As MethodInfo = clsType.GetMethod("Win32CallMethod")
        If Not (mInfo Is Nothing) Then
            ' Iterate through all the attributes of the method.
            Dim attr As Attribute
            For Each attr In  Attribute.GetCustomAttributes(mInfo)
                ' Check for the Obsolete attribute.
                If attr.GetType().Equals(GetType(ObsoleteAttribute)) Then
                    Console.WriteLine("Method {0} is obsolete. The message is:", mInfo.Name)
                    Console.WriteLine("  ""{0}""", CType(attr, ObsoleteAttribute).Message)
                ' Check for the Unmanaged attribute.
                ElseIf attr.GetType().Equals(GetType(UnmanagedAttribute)) Then
                    Console.WriteLine("This method calls unmanaged code.")
                    Console.WriteLine( _
                            String.Format("The Unmanaged attribute type is {0}.", _
                            CType(attr, UnmanagedAttribute).Win32Type))
                    Dim myCls As New AClass()
                    myCls.Win32CallMethod()
                End If
            Next attr
        End If
    End Sub 'Main
End Class 'DemoClass

'
'This code example produces the following results. 
'
'First, the compilation yields the warning, "...This method is 
'obsolete. Use managed MsgBox instead."
'Second, execution yields a message box with a title of "Caution!" 
'and message text of "This is an unmanaged call." 
'Third, the following text is displayed in the console window:
'
'Method Win32CallMethod is obsolete. The message is:
'  "This method is obsolete. Use managed MsgBox instead."
'This method calls unmanaged code.
'The Unmanaged attribute type is User.
' 

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element Wenn inherit ist true.The return value contains the custom attributes for ancestors of element if inherit is true.

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode für Methoden, Konstruktoren und Typen von Sicherheitsattributen zurück, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type) GetCustomAttributes(Assembly, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the assembly, and the type of the custom attribute to search for.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Assembly ^ element, Type ^ attributeType);
public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element, Type attributeType);
static member GetCustomAttributes : System.Reflection.Assembly * Type -> Attribute[]
Public Shared Function GetCustomAttributes (element As Assembly, attributeType As Type) As Attribute()

Parameter

element
Assembly Assembly Assembly Assembly

Ein Objekt, das aus der Assembly-Klasse abgeleitet wurde, die eine wiederverwendbare Auflistung von Modulen beschreibt.An object derived from the Assembly class that describes a reusable collection of modules.

attributeType
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ attributeType, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type attributeType applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

attributeType ist nicht von Attribute abgeleitet.attributeType is not derived from Attribute.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei ein Assembly als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking an Assembly as a parameter.

using namespace System;
using namespace System::Reflection;

[assembly:AssemblyTitle("CustAttrs1CPP")];
[assembly:AssemblyDescription("GetCustomAttributes() Demo")];
[assembly:AssemblyCompany("Microsoft")];

ref class Example
{};

static void main()
{
    Type^ clsType = Example::typeid;

    // Get the Assembly type to access its metadata.
    Assembly^ assy = clsType->Assembly;

    // Iterate through the attributes for the assembly.
    System::Collections::IEnumerator^ myEnum = Attribute::GetCustomAttributes( assy )->GetEnumerator();
    while ( myEnum->MoveNext() )
    {
       Attribute^ attr = safe_cast<Attribute^>(myEnum->Current);

       // Check for the AssemblyTitle attribute.
       if ( attr->GetType() == AssemblyTitleAttribute::typeid )
          Console::WriteLine( "Assembly title is \"{0}\".", (dynamic_cast<AssemblyTitleAttribute^>(attr))->Title );
          // Check for the AssemblyDescription attribute.
       else
          // Check for the AssemblyDescription attribute.
          if ( attr->GetType() == AssemblyDescriptionAttribute::typeid )
             Console::WriteLine( "Assembly description is \"{0}\".", (dynamic_cast<AssemblyDescriptionAttribute^>(attr))->Description );
          // Check for the AssemblyCompany attribute.
          else if ( attr->GetType() == AssemblyCompanyAttribute::typeid )
             Console::WriteLine( "Assembly company is {0}.", (dynamic_cast<AssemblyCompanyAttribute^>(attr))->Company );
    }
}
// The example displays the following output:
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
//     Assembly title is "CustAttrs1CPP".
using System;
using System.Reflection;

[assembly: AssemblyTitle("CustAttrs1CS")]
[assembly: AssemblyDescription("GetCustomAttributes() Demo")]
[assembly: AssemblyCompany("Microsoft")]

class Example {
    static void Main() {
        // Get the Assembly object to access its metadata.
        Assembly assy = typeof(Example).Assembly;

        // Iterate through the attributes for the assembly.
        foreach(Attribute attr in Attribute.GetCustomAttributes(assy)) {
            // Check for the AssemblyTitle attribute.
            if (attr.GetType() == typeof(AssemblyTitleAttribute))
                Console.WriteLine("Assembly title is \"{0}\".",
                    ((AssemblyTitleAttribute)attr).Title);

            // Check for the AssemblyDescription attribute.
            else if (attr.GetType() == 
                typeof(AssemblyDescriptionAttribute))
                Console.WriteLine("Assembly description is \"{0}\".",
                    ((AssemblyDescriptionAttribute)attr).Description);

            // Check for the AssemblyCompany attribute.
            else if (attr.GetType() == typeof(AssemblyCompanyAttribute))
                Console.WriteLine("Assembly company is {0}.",
                    ((AssemblyCompanyAttribute)attr).Company);
        }
   }
}
// The example displays the following output:
//     Assembly title is "CustAttrs1CS".
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
Imports System.Reflection

<Assembly: AssemblyTitle("CustAttrs1VB")> 
<Assembly: AssemblyDescription("GetCustomAttributes() Demo")> 
<Assembly: AssemblyCompany("Microsoft")> 

Module Example
    Sub Main()
        ' Get the Assembly type to access its metadata.
        Dim assy As Reflection.Assembly = GetType(Example).Assembly

        ' Iterate through all the attributes for the assembly.
        For Each attr As Attribute In Attribute.GetCustomAttributes(assy)
            ' Check for the AssemblyTitle attribute.
            If TypeOf attr Is AssemblyTitleAttribute Then
                ' Convert the attribute to access its data.
                Dim attrTitle As AssemblyTitleAttribute = _
                    CType(attr, AssemblyTitleAttribute)
                Console.WriteLine("Assembly title is ""{0}"".", _
                    attrTitle.Title)

            ' Check for the AssemblyDescription attribute.
            ElseIf TypeOf attr Is AssemblyDescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim attrDesc As AssemblyDescriptionAttribute = _
                    CType(attr, AssemblyDescriptionAttribute)
                Console.WriteLine("Assembly description is ""{0}"".", _
                    attrDesc.Description)

            ' Check for the AssemblyCompany attribute.
            ElseIf TypeOf attr Is AssemblyCompanyAttribute Then
                ' Convert the attribute to access its data.
                Dim attrComp As AssemblyCompanyAttribute = _
                    CType(attr, AssemblyCompanyAttribute)
                Console.WriteLine("Assembly company is {0}.", _
                    attrComp.Company)
            End If
        Next
    End Sub
End Module
' The example displays the following output:
'     Assembly company is Microsoft.
'     Assembly description is "GetCustomAttributes() Demo".
'     Assembly title is "CustAttrs1VB".

Hinweise

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode Sicherheitsattribute aus, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean) GetCustomAttributes(Assembly, Boolean)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Parameter geben die Assembly und eine ignorierte Suchoption an.Parameters specify the assembly, and an ignored search option.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Assembly ^ element, bool inherit);
public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element, bool inherit);
static member GetCustomAttributes : System.Reflection.Assembly * bool -> Attribute[]
Public Shared Function GetCustomAttributes (element As Assembly, inherit As Boolean) As Attribute()

Parameter

element
Assembly Assembly Assembly Assembly

Ein Objekt, das aus der Assembly-Klasse abgeleitet wurde, die eine wiederverwendbare Auflistung von Modulen beschreibt.An object derived from the Assembly class that describes a reusable collection of modules.

inherit
Boolean Boolean Boolean Boolean

Dieser Parameter wird ignoriert und wirkt sich nicht auf die Funktionsweise dieser Methode aus.This parameter is ignored, and does not affect the operation of this method.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder attributeType ist null.element or attributeType is null.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei ein Assembly als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking an Assembly as a parameter.

using namespace System;
using namespace System::Reflection;

[assembly:AssemblyTitle("CustAttrs1CPP")];
[assembly:AssemblyDescription("GetCustomAttributes() Demo")];
[assembly:AssemblyCompany("Microsoft")];

ref class Example
{};

static void main()
{
    Type^ clsType = Example::typeid;

    // Get the Assembly type to access its metadata.
    Assembly^ assy = clsType->Assembly;

    // Iterate through the attributes for the assembly.
    System::Collections::IEnumerator^ myEnum = Attribute::GetCustomAttributes( assy )->GetEnumerator();
    while ( myEnum->MoveNext() )
    {
       Attribute^ attr = safe_cast<Attribute^>(myEnum->Current);

       // Check for the AssemblyTitle attribute.
       if ( attr->GetType() == AssemblyTitleAttribute::typeid )
          Console::WriteLine( "Assembly title is \"{0}\".", (dynamic_cast<AssemblyTitleAttribute^>(attr))->Title );
          // Check for the AssemblyDescription attribute.
       else
          // Check for the AssemblyDescription attribute.
          if ( attr->GetType() == AssemblyDescriptionAttribute::typeid )
             Console::WriteLine( "Assembly description is \"{0}\".", (dynamic_cast<AssemblyDescriptionAttribute^>(attr))->Description );
          // Check for the AssemblyCompany attribute.
          else if ( attr->GetType() == AssemblyCompanyAttribute::typeid )
             Console::WriteLine( "Assembly company is {0}.", (dynamic_cast<AssemblyCompanyAttribute^>(attr))->Company );
    }
}
// The example displays the following output:
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
//     Assembly title is "CustAttrs1CPP".
using System;
using System.Reflection;

[assembly: AssemblyTitle("CustAttrs1CS")]
[assembly: AssemblyDescription("GetCustomAttributes() Demo")]
[assembly: AssemblyCompany("Microsoft")]

class Example {
    static void Main() {
        // Get the Assembly object to access its metadata.
        Assembly assy = typeof(Example).Assembly;

        // Iterate through the attributes for the assembly.
        foreach(Attribute attr in Attribute.GetCustomAttributes(assy)) {
            // Check for the AssemblyTitle attribute.
            if (attr.GetType() == typeof(AssemblyTitleAttribute))
                Console.WriteLine("Assembly title is \"{0}\".",
                    ((AssemblyTitleAttribute)attr).Title);

            // Check for the AssemblyDescription attribute.
            else if (attr.GetType() == 
                typeof(AssemblyDescriptionAttribute))
                Console.WriteLine("Assembly description is \"{0}\".",
                    ((AssemblyDescriptionAttribute)attr).Description);

            // Check for the AssemblyCompany attribute.
            else if (attr.GetType() == typeof(AssemblyCompanyAttribute))
                Console.WriteLine("Assembly company is {0}.",
                    ((AssemblyCompanyAttribute)attr).Company);
        }
   }
}
// The example displays the following output:
//     Assembly title is "CustAttrs1CS".
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
Imports System.Reflection

<Assembly: AssemblyTitle("CustAttrs1VB")> 
<Assembly: AssemblyDescription("GetCustomAttributes() Demo")> 
<Assembly: AssemblyCompany("Microsoft")> 

Module Example
    Sub Main()
        ' Get the Assembly type to access its metadata.
        Dim assy As Reflection.Assembly = GetType(Example).Assembly

        ' Iterate through all the attributes for the assembly.
        For Each attr As Attribute In Attribute.GetCustomAttributes(assy)
            ' Check for the AssemblyTitle attribute.
            If TypeOf attr Is AssemblyTitleAttribute Then
                ' Convert the attribute to access its data.
                Dim attrTitle As AssemblyTitleAttribute = _
                    CType(attr, AssemblyTitleAttribute)
                Console.WriteLine("Assembly title is ""{0}"".", _
                    attrTitle.Title)

            ' Check for the AssemblyDescription attribute.
            ElseIf TypeOf attr Is AssemblyDescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim attrDesc As AssemblyDescriptionAttribute = _
                    CType(attr, AssemblyDescriptionAttribute)
                Console.WriteLine("Assembly description is ""{0}"".", _
                    attrDesc.Description)

            ' Check for the AssemblyCompany attribute.
            ElseIf TypeOf attr Is AssemblyCompanyAttribute Then
                ' Convert the attribute to access its data.
                Dim attrComp As AssemblyCompanyAttribute = _
                    CType(attr, AssemblyCompanyAttribute)
                Console.WriteLine("Assembly company is {0}.", _
                    attrComp.Company)
            End If
        Next
    End Sub
End Module
' The example displays the following output:
'     Assembly company is Microsoft.
'     Assembly description is "GetCustomAttributes() Demo".
'     Assembly title is "CustAttrs1VB".

Hinweise

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode Sicherheitsattribute aus, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo) GetCustomAttributes(ParameterInfo)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf einen Methodenparameter angewendet werden.Retrieves an array of the custom attributes applied to a method parameter. Ein Parameter gibt den Methodenparameter an.A parameter specifies the method parameter.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::ParameterInfo ^ element);
public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element);
static member GetCustomAttributes : System.Reflection.ParameterInfo -> Attribute[]
Public Shared Function GetCustomAttributes (element As ParameterInfo) As Attribute()

Parameter

element
ParameterInfo ParameterInfo ParameterInfo ParameterInfo

Ein Objekt, das von der ParameterInfo-Klasse abgeleitet wurde und einen Parameter eines Klassenmembers beschreibt.An object derived from the ParameterInfo class that describes a parameter of a member of a class.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine ParameterInfo als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a ParameterInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

namespace CustAttrs5CS
{
   public ref class AClass
   {
   public:
      void ParamArrayAndDesc(
         // Add ParamArray and Description attributes.
         [Description("This argument is a ParamArray")]
         array<Int32>^args )
      {}
   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the method.
         MethodInfo^ mInfo = clsType->GetMethod( "ParamArrayAndDesc" );
         if ( mInfo != nullptr )
         {
            // Get the parameter information.
            array<ParameterInfo^>^pInfo = mInfo->GetParameters();
            if ( pInfo != nullptr )
            {
               // Iterate through all the attributes for the parameter.
               System::Collections::IEnumerator^ myEnum4 = Attribute::GetCustomAttributes( pInfo[ 0 ] )->GetEnumerator();
               while ( myEnum4->MoveNext() )
               {
                  Attribute^ attr = safe_cast<Attribute^>(myEnum4->Current);

                  // Check for the ParamArray attribute.
                  if ( attr->GetType() == ParamArrayAttribute::typeid )
                                    Console::WriteLine( "Parameter {0} for method {1} "
                  "has the ParamArray attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                  // Check for the Description attribute.
                  else

                  // Check for the Description attribute.
                  if ( attr->GetType() == DescriptionAttribute::typeid )
                  {
                     Console::WriteLine( "Parameter {0} for method {1} "
                     "has a description attribute.", pInfo[ 0 ]->Name, mInfo->Name );
                     Console::WriteLine( "The description is: \"{0}\"", (dynamic_cast<DescriptionAttribute^>(attr))->Description );
                  }
               }
            }
         }
      }
   };
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
using System;
using System.Reflection;
using System.ComponentModel;

namespace CustAttrs5CS {
    public class AClass {
        public void ParamArrayAndDesc(
            // Add ParamArray (with the keyword) and Description attributes.
            [Description("This argument is a ParamArray")]
            params int[] args)
        {}
    }

    class DemoClass {
        static void Main(string[] args) {
            // Get the Class type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for the method.
            MethodInfo mInfo = clsType.GetMethod("ParamArrayAndDesc");
            if (mInfo != null) {
                // Get the parameter information.
                ParameterInfo[] pInfo = mInfo.GetParameters();
                if (pInfo != null) {
                    // Iterate through all the attributes for the parameter.
                    foreach(Attribute attr in 
                        Attribute.GetCustomAttributes(pInfo[0])) {
                        // Check for the ParamArray attribute.
                        if (attr.GetType() == typeof(ParamArrayAttribute))
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has the ParamArray attribute.",
                                pInfo[0].Name, mInfo.Name);
                        // Check for the Description attribute.
                        else if (attr.GetType() == 
                            typeof(DescriptionAttribute)) {
                            Console.WriteLine("Parameter {0} for method {1} " +
                                "has a description attribute.",
                                pInfo[0].Name, mInfo.Name);
                            Console.WriteLine("The description is: \"{0}\"",
                                ((DescriptionAttribute)attr).Description);
                        }
                    }
                }
            }
        }
    }
}

/*
 * Output:
 * Parameter args for method ParamArrayAndDesc has a description attribute.
 * The description is: "This argument is a ParamArray"
 * Parameter args for method ParamArrayAndDesc has the ParamArray attribute.
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

Module DemoModule
    Public Class AClass
        ' Add Description and ParamArray (with the keyword) attributes.
        Public Sub ParamArrayAndDesc( _
            <Description("This argument is a ParamArray")> _
            ByVal ParamArray args() As Integer)
        End Sub
    End Class

    Sub Main()
        ' Get the Class type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for the method.
        Dim mInfo As MethodInfo = clsType.GetMethod("ParamArrayAndDesc")
        ' Get the Parameter information for the method.
        Dim pInfo() As ParameterInfo = mInfo.GetParameters()
        Dim attr As Attribute
        ' Iterate through each attribute of the parameter.
        For Each attr In Attribute.GetCustomAttributes(pInfo(0))
            ' Check for the ParamArray attribute.
            If TypeOf attr Is ParamArrayAttribute Then
                ' Convert the attribute to access its data.
                Dim paAttr As ParamArrayAttribute = _
                    CType(attr, ParamArrayAttribute)
                Console.WriteLine("Parameter {0} has the " + _
                    "ParamArray attribute.", pInfo(0).Name)
            ' Check for the Description attribute.
            ElseIf TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Parameter {0} has a description " + _
                    "attribute. The description is:", pInfo(0).Name)
                Console.WriteLine(descAttr.Description)
            End If
        Next
    End Sub
End Module

' Output:
' Parameter args has a description attribute. The description is:
' This argument is a ParamArray
' Parameter args has the ParamArray attribute.

Hinweise

Wenn element stellt einen Parameter in einer Methode eines abgeleiteten Typs, der Rückgabewert enthält die vererbbaren benutzerdefinierten Attribute, die auf den gleichen Parameter in der überschriebenen Basismethoden angewendet.If element represents a parameter in a method of a derived type, the return value includes the inheritable custom attributes applied to the same parameter in the overridden base methods.

GetCustomAttributes(Module) GetCustomAttributes(Module) GetCustomAttributes(Module) GetCustomAttributes(Module)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf ein Modul angewendet werden.Retrieves an array of the custom attributes applied to a module. Ein Parameter gibt das Modul an.A parameter specifies the module.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Module ^ element);
public static Attribute[] GetCustomAttributes (System.Reflection.Module element);
static member GetCustomAttributes : System.Reflection.Module -> Attribute[]
Public Shared Function GetCustomAttributes (element As Module) As Attribute()

Parameter

element
Module Module Module Module

Ein Objekt, das von der Module-Klasse abgeleitet wurde und eine übertragbare ausführbare Datei (Portable Executable, PE) beschreibt.An object derived from the Module class that describes a portable executable file.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttributes, wobei eine Module als Parameter.The following code example demonstrates the use of GetCustomAttributes, taking a Module as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;

// Assign some attributes to the module.
// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:Description("A sample description")];
[module:CLSCompliant(false)];
namespace CustAttrs2CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {
         Type^ clsType = DemoClass::typeid;

         // Get the Module type to access its metadata.
         Module^ module = clsType->Module;

         // Iterate through all the attributes for the module.
         System::Collections::IEnumerator^ myEnum1 = Attribute::GetCustomAttributes( module )->GetEnumerator();
         while ( myEnum1->MoveNext() )
         {
            Attribute^ attr = safe_cast<Attribute^>(myEnum1->Current);

            // Check for the Description attribute.
            if ( attr->GetType() == DescriptionAttribute::typeid )
                        Console::WriteLine( "Module {0} has the description \"{1}\".", module->Name, (dynamic_cast<DescriptionAttribute^>(attr))->Description );
            // Check for the CLSCompliant attribute.
            else

            // Check for the CLSCompliant attribute.
            if ( attr->GetType() == CLSCompliantAttribute::typeid )
                        Console::WriteLine( "Module {0} {1} CLSCompliant.", module->Name, (dynamic_cast<CLSCompliantAttribute^>(attr))->IsCompliant ? (String^)"is" : "is not" );
         }
      }
   };
}


/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
using System;
using System.Reflection;
using System.ComponentModel;

// Assign some attributes to the module.
[module:Description("A sample description")]

// Set the module's CLSCompliant attribute to false
// The CLSCompliant attribute is applicable for /target:module.
[module:CLSCompliant(false)]

namespace CustAttrs2CS {
    class DemoClass {
        static void Main(string[] args) {
            Type clsType = typeof(DemoClass);
            // Get the Module type to access its metadata.
            Module module = clsType.Module;

            // Iterate through all the attributes for the module.
            foreach(Attribute attr in Attribute.GetCustomAttributes(module)) {
                // Check for the Description attribute.
                if (attr.GetType() == typeof(DescriptionAttribute))
                    Console.WriteLine("Module {0} has the description " +
                        "\"{1}\".", module.Name, 
                        ((DescriptionAttribute)attr).Description);
                // Check for the CLSCompliant attribute.
                else if (attr.GetType() == typeof(CLSCompliantAttribute))
                    Console.WriteLine("Module {0} {1} CLSCompliant.",
                        module.Name,
                        ((CLSCompliantAttribute)attr).IsCompliant ? 
                            "is" : "is not");
            }
        }
    }
}

/*
 * Output:
 * Module CustAttrs2CS.exe is not CLSCompliant.
 * Module CustAttrs2CS.exe has the description "A sample description".
 */
Imports System
Imports System.Reflection
Imports System.ComponentModel

' Give the Module some attributes.
<Module: Description("A sample description")> 

' Make the CLSCompliant attribute False.
' The CLSCompliant attribute is applicable for /target:module.
<Module: CLSCompliant(False)> 

Module DemoModule

    Sub Main()
        ' Get the Module type to access its metadata.
        Dim modType As Reflection.Module = GetType(DemoModule).Module
        Dim attr As Attribute
        ' Iterate through all the attributes for the module.
        For Each attr In Attribute.GetCustomAttributes(modType)
            ' Check for the Description attribute.
            If TypeOf attr Is DescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim descAttr As DescriptionAttribute = _
                    CType(attr, DescriptionAttribute)
                Console.WriteLine("Module {0} has the description ""{1}"".", _
                    modType.Name, descAttr.Description)

            ' Check for the CLSCompliant attribute.
            ElseIf TypeOf attr Is CLSCompliantAttribute Then
                ' Convert the attribute to access its data.
                Dim CLSCompAttr As CLSCompliantAttribute = _
                    CType(attr, CLSCompliantAttribute)
                Dim strCompliant As String
                If CLSCompAttr.IsCompliant Then
                    strCompliant = "is"
                Else
                    strCompliant = "is not"
                End If
                Console.WriteLine("Module {0} {1} CLSCompliant.", _
                    modType.Name, strCompliant)
            End If
        Next
    End Sub
End Module

' Output:
' Module CustAttrs2VB.exe has the description "A sample description".
' Module CustAttrs2VB.exe is not CLSCompliant.

GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo) GetCustomAttributes(MemberInfo)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Ein Parameter gibt den Member an.A parameter specifies the member.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::MemberInfo ^ element);
public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element);
static member GetCustomAttributes : System.Reflection.MemberInfo -> Attribute[]
Public Shared Function GetCustomAttributes (element As MemberInfo) As Attribute()

Parameter

element
MemberInfo MemberInfo MemberInfo MemberInfo

Ein Objekt, das aus der MemberInfo-Klasse abgeleitet wurde und einen Konstruktor-, Ereignis-, Feld-, Methoden- oder Eigenschaftenmember einer Klasse beschreibt.An object derived from the MemberInfo class that describes a constructor, event, field, method, or property member of a class.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element ist kein Konstruktor, keine Methode, keine Eigenschaft, kein Ereignis, kein Typ und kein Feld.element is not a constructor, method, property, event, type, or field.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttribute, wobei eine MemberInfo als Parameter.The following code example demonstrates the use of GetCustomAttribute, taking a MemberInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::Security;
using namespace System::Runtime::InteropServices;

namespace CustAttrs4CS
{
   // Create a class for Win32 imported unmanaged functions.
   public ref class Win32
   {
   public:

      [DllImport("user32.dll", CharSet = CharSet::Unicode)]
      static int MessageBox( int hWnd, String^ text, String^ caption, UInt32 type );
   };

   public ref class AClass
   {
   public:

      // Add some attributes to the Win32CallMethod.

      [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
      void Win32CallMethod()
      {
         Win32::MessageBox( 0, "This is an unmanaged call.", "Be Careful!", 0 );
      }

   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the Win32CallMethod.
         MethodInfo^ mInfo = clsType->GetMethod( "Win32CallMethod" );
         if ( mInfo != nullptr )
         {
            // Iterate through all the attributes for the method.
            System::Collections::IEnumerator^ myEnum3 = Attribute::GetCustomAttributes( mInfo )->GetEnumerator();
            while ( myEnum3->MoveNext() )
            {
               Attribute^ attr = safe_cast<Attribute^>(myEnum3->Current);

               // Check for the Obsolete attribute.
               if ( attr->GetType() == ObsoleteAttribute::typeid )
               {
                  Console::WriteLine( "Method {0} is obsolete. "
                  "The message is:", mInfo->Name );
                  Console::WriteLine( (dynamic_cast<ObsoleteAttribute^>(attr))->Message );
               }
               // Check for the SuppressUnmanagedCodeSecurity attribute.
               else

               // Check for the SuppressUnmanagedCodeSecurity attribute.
               if ( attr->GetType() == SuppressUnmanagedCodeSecurityAttribute::typeid )
               {
                  Console::WriteLine( "This method calls unmanaged code "
                  "with no security check." );
                  Console::WriteLine( "Please do not use unless absolutely necessary." );
                  AClass^ myCls = gcnew AClass;
                  myCls->Win32CallMethod();
               }
            }
         }
      }
   };
}


/*
 * Output:
 * Method Win32CallMethod is obsolete. The message is:
 * This method is obsolete. Use managed MsgBox instead.
 * This method calls unmanaged code with no security check.
 * Please do not use unless absolutely necessary.
 */
using System;
using System.Reflection;
using System.Security;
using System.Runtime.InteropServices;

namespace CustAttrs4CS
{

    // Define an enumeration of Win32 unmanaged types
    public enum UnmanagedType
    {
        User,
        GDI,
        Kernel,
        Shell,
        Networking,
        Multimedia
    }

    // Define the Unmanaged attribute.
    public class UnmanagedAttribute : Attribute
    {
        // Storage for the UnmanagedType value.
        protected UnmanagedType thisType;

        // Set the unmanaged type in the constructor.
        public UnmanagedAttribute(UnmanagedType type)
        {
            thisType = type;
        }

        // Define a property to get and set the UnmanagedType value.
        public UnmanagedType Win32Type
        {
            get { return thisType; }
            set { thisType = Win32Type; }
        }
    }

    // Create a class for an imported Win32 unmanaged function.
    public class Win32 {
        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        public static extern int MessageBox(int hWnd, String text,
            String caption, uint type);
    }

    public class AClass {
        // Add some attributes to Win32CallMethod.
        [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
        [Unmanaged(UnmanagedType.User)]
        public void Win32CallMethod()
        {
            Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0);
        }
    }

    class DemoClass {
        static void Main(string[] args)
            {
            // Get the AClass type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for Win32CallMethod.
            MethodInfo mInfo = clsType.GetMethod("Win32CallMethod");
            if (mInfo != null)
            {
                // Iterate through all the attributes of the method.
                foreach(Attribute attr in
                    Attribute.GetCustomAttributes(mInfo)) {
                    // Check for the Obsolete attribute.
                    if (attr.GetType() == typeof(ObsoleteAttribute))
                    {
                        Console.WriteLine("Method {0} is obsolete. " +
                            "The message is:",
                            mInfo.Name);
                        Console.WriteLine("  \"{0}\"",
                            ((ObsoleteAttribute)attr).Message);
                    }

                    // Check for the Unmanaged attribute.
                    else if (attr.GetType() == typeof(UnmanagedAttribute))
                    {
                        Console.WriteLine(
                            "This method calls unmanaged code.");
                        Console.WriteLine(
                            String.Format("The Unmanaged attribute type is {0}.",
                                          ((UnmanagedAttribute)attr).Win32Type));
                        AClass myCls = new AClass();
                        myCls.Win32CallMethod();
                    }
                }
            }
        }
    }
}

/*

This code example produces the following results.

First, the compilation yields the warning, "...This method is
obsolete. Use managed MsgBox instead."
Second, execution yields a message box with a title of "Caution!"
and message text of "This is an unmanaged call."
Third, the following text is displayed in the console window:

Method Win32CallMethod is obsolete. The message is:
  "This method is obsolete. Use managed MsgBox instead."
This method calls unmanaged code.
The Unmanaged attribute type is User.

*/

Imports System
Imports System.Reflection
Imports System.Security
Imports System.Runtime.InteropServices

' Define an enumeration of Win32 unmanaged types
Public Enum UnmanagedType
    User
    GDI
    Kernel
    Shell
    Networking
    Multimedia
End Enum 'UnmanagedType

' Define the Unmanaged attribute.
Public Class UnmanagedAttribute 
             Inherits Attribute

    ' Storage for the UnmanagedType value.
    Protected thisType As UnmanagedType
    
    ' Set the unmanaged type in the constructor.
    Public Sub New(ByVal type As UnmanagedType) 
        thisType = type
    End Sub 'New
    
    ' Define a property to get and set the UnmanagedType value.
    Public Property Win32Type() As UnmanagedType 
        Get
            Return thisType
        End Get
        Set
            thisType = Win32Type
        End Set
    End Property
End Class 'UnmanagedAttribute 

' Create a class for an imported Win32 unmanaged function.
Public Class Win32
    <DllImport("user32.dll", CharSet:=CharSet.Unicode)> _
    Public Shared Function MessageBox(ByVal hWnd As Integer, _
                                      ByVal Text As String, _
                                      ByVal caption As String, _
                                      ByVal type As Integer) As Integer
    End Function 'MessageBox
End Class 'Win32

Public Class AClass
    ' Add some attributes to Win32CallMethod.
    <Obsolete("This method is obsolete. Use managed MsgBox instead."), _
     Unmanaged(UnmanagedType.User)>  _
    Public Sub Win32CallMethod() 
        Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0)    
    End Sub 'Win32CallMethod
End Class 'AClass

Class DemoClass
    Shared Sub Main(ByVal args() As String) 
        ' Get the AClass type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for Win32CallMethod.
        Dim mInfo As MethodInfo = clsType.GetMethod("Win32CallMethod")
        If Not (mInfo Is Nothing) Then
            ' Iterate through all the attributes of the method.
            Dim attr As Attribute
            For Each attr In  Attribute.GetCustomAttributes(mInfo)
                ' Check for the Obsolete attribute.
                If attr.GetType().Equals(GetType(ObsoleteAttribute)) Then
                    Console.WriteLine("Method {0} is obsolete. The message is:", mInfo.Name)
                    Console.WriteLine("  ""{0}""", CType(attr, ObsoleteAttribute).Message)
                ' Check for the Unmanaged attribute.
                ElseIf attr.GetType().Equals(GetType(UnmanagedAttribute)) Then
                    Console.WriteLine("This method calls unmanaged code.")
                    Console.WriteLine( _
                            String.Format("The Unmanaged attribute type is {0}.", _
                            CType(attr, UnmanagedAttribute).Win32Type))
                    Dim myCls As New AClass()
                    myCls.Win32CallMethod()
                End If
            Next attr
        End If
    End Sub 'Main
End Class 'DemoClass

'
'This code example produces the following results. 
'
'First, the compilation yields the warning, "...This method is 
'obsolete. Use managed MsgBox instead."
'Second, execution yields a message box with a title of "Caution!" 
'and message text of "This is an unmanaged call." 
'Third, the following text is displayed in the console window:
'
'Method Win32CallMethod is obsolete. The message is:
'  "This method is obsolete. Use managed MsgBox instead."
'This method calls unmanaged code.
'The Unmanaged attribute type is User.
' 

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element.The return value contains the custom attributes for ancestors of element.

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode für Methoden, Konstruktoren und Typen von Sicherheitsattributen zurück, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(Assembly) GetCustomAttributes(Assembly) GetCustomAttributes(Assembly) GetCustomAttributes(Assembly)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf eine Assembly angewendet werden.Retrieves an array of the custom attributes applied to an assembly. Ein Parameter gibt die Assembly an.A parameter specifies the assembly.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::Assembly ^ element);
public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element);
static member GetCustomAttributes : System.Reflection.Assembly -> Attribute[]
Public Shared Function GetCustomAttributes (element As Assembly) As Attribute()

Parameter

element
Assembly Assembly Assembly Assembly

Ein Objekt, das aus der Assembly-Klasse abgeleitet wurde, die eine wiederverwendbare Auflistung von Modulen beschreibt.An object derived from the Assembly class that describes a reusable collection of modules.

Gibt zurück

Ein Attribute-Array, das die benutzerdefinierten Attribute enthält, die auf element angewendet werden, oder ein leeres Array, wenn keine solchen benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

Beispiele

Das folgende Beispiel ruft die benutzerdefinierten Attribute, die in der aktuellen Assembly gefunden.The following example retrieves the custom attributes found in the current assembly.

using namespace System;
using namespace System::Reflection;

[assembly:AssemblyTitle("CustAttrs1CPP")];
[assembly:AssemblyDescription("GetCustomAttributes() Demo")];
[assembly:AssemblyCompany("Microsoft")];

ref class Example
{};

static void main()
{
    Type^ clsType = Example::typeid;

    // Get the Assembly type to access its metadata.
    Assembly^ assy = clsType->Assembly;

    // Iterate through the attributes for the assembly.
    System::Collections::IEnumerator^ myEnum = Attribute::GetCustomAttributes( assy )->GetEnumerator();
    while ( myEnum->MoveNext() )
    {
       Attribute^ attr = safe_cast<Attribute^>(myEnum->Current);

       // Check for the AssemblyTitle attribute.
       if ( attr->GetType() == AssemblyTitleAttribute::typeid )
          Console::WriteLine( "Assembly title is \"{0}\".", (dynamic_cast<AssemblyTitleAttribute^>(attr))->Title );
          // Check for the AssemblyDescription attribute.
       else
          // Check for the AssemblyDescription attribute.
          if ( attr->GetType() == AssemblyDescriptionAttribute::typeid )
             Console::WriteLine( "Assembly description is \"{0}\".", (dynamic_cast<AssemblyDescriptionAttribute^>(attr))->Description );
          // Check for the AssemblyCompany attribute.
          else if ( attr->GetType() == AssemblyCompanyAttribute::typeid )
             Console::WriteLine( "Assembly company is {0}.", (dynamic_cast<AssemblyCompanyAttribute^>(attr))->Company );
    }
}
// The example displays the following output:
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
//     Assembly title is "CustAttrs1CPP".
using System;
using System.Reflection;

[assembly: AssemblyTitle("CustAttrs1CS")]
[assembly: AssemblyDescription("GetCustomAttributes() Demo")]
[assembly: AssemblyCompany("Microsoft")]

class Example {
    static void Main() {
        // Get the Assembly object to access its metadata.
        Assembly assy = typeof(Example).Assembly;

        // Iterate through the attributes for the assembly.
        foreach(Attribute attr in Attribute.GetCustomAttributes(assy)) {
            // Check for the AssemblyTitle attribute.
            if (attr.GetType() == typeof(AssemblyTitleAttribute))
                Console.WriteLine("Assembly title is \"{0}\".",
                    ((AssemblyTitleAttribute)attr).Title);

            // Check for the AssemblyDescription attribute.
            else if (attr.GetType() == 
                typeof(AssemblyDescriptionAttribute))
                Console.WriteLine("Assembly description is \"{0}\".",
                    ((AssemblyDescriptionAttribute)attr).Description);

            // Check for the AssemblyCompany attribute.
            else if (attr.GetType() == typeof(AssemblyCompanyAttribute))
                Console.WriteLine("Assembly company is {0}.",
                    ((AssemblyCompanyAttribute)attr).Company);
        }
   }
}
// The example displays the following output:
//     Assembly title is "CustAttrs1CS".
//     Assembly description is "GetCustomAttributes() Demo".
//     Assembly company is Microsoft.
Imports System.Reflection

<Assembly: AssemblyTitle("CustAttrs1VB")> 
<Assembly: AssemblyDescription("GetCustomAttributes() Demo")> 
<Assembly: AssemblyCompany("Microsoft")> 

Module Example
    Sub Main()
        ' Get the Assembly type to access its metadata.
        Dim assy As Reflection.Assembly = GetType(Example).Assembly

        ' Iterate through all the attributes for the assembly.
        For Each attr As Attribute In Attribute.GetCustomAttributes(assy)
            ' Check for the AssemblyTitle attribute.
            If TypeOf attr Is AssemblyTitleAttribute Then
                ' Convert the attribute to access its data.
                Dim attrTitle As AssemblyTitleAttribute = _
                    CType(attr, AssemblyTitleAttribute)
                Console.WriteLine("Assembly title is ""{0}"".", _
                    attrTitle.Title)

            ' Check for the AssemblyDescription attribute.
            ElseIf TypeOf attr Is AssemblyDescriptionAttribute Then
                ' Convert the attribute to access its data.
                Dim attrDesc As AssemblyDescriptionAttribute = _
                    CType(attr, AssemblyDescriptionAttribute)
                Console.WriteLine("Assembly description is ""{0}"".", _
                    attrDesc.Description)

            ' Check for the AssemblyCompany attribute.
            ElseIf TypeOf attr Is AssemblyCompanyAttribute Then
                ' Convert the attribute to access its data.
                Dim attrComp As AssemblyCompanyAttribute = _
                    CType(attr, AssemblyCompanyAttribute)
                Console.WriteLine("Assembly company is {0}.", _
                    attrComp.Company)
            End If
        Next
    End Sub
End Module
' The example displays the following output:
'     Assembly company is Microsoft.
'     Assembly description is "GetCustomAttributes() Demo".
'     Assembly title is "CustAttrs1VB".

Hinweise

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode Sicherheitsattribute aus, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

GetCustomAttributes(MemberInfo, Type) GetCustomAttributes(MemberInfo, Type) GetCustomAttributes(MemberInfo, Type)

Ruft ein Array der benutzerdefinierten Attribute ab, die auf den Member eines Typs angewendet werden.Retrieves an array of the custom attributes applied to a member of a type. Parameter geben den Member und den Typ des zu suchenden benutzerdefinierten Attributs an.Parameters specify the member, and the type of the custom attribute to search for.

public:
 static cli::array <Attribute ^> ^ GetCustomAttributes(System::Reflection::MemberInfo ^ element, Type ^ type);
public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element, Type type);
static member GetCustomAttributes : System.Reflection.MemberInfo * Type -> Attribute[]

Parameter

element
MemberInfo MemberInfo MemberInfo MemberInfo

Ein Objekt, das aus der MemberInfo-Klasse abgeleitet wurde und einen Konstruktor-, Ereignis-, Feld-, Methoden- oder Eigenschaftenmember einer Klasse beschreibt.An object derived from the MemberInfo class that describes a constructor, event, field, method, or property member of a class.

type
Type Type Type Type

Der Typ des benutzerdefinierten Attributs oder ein Basistyp, nach dem gesucht werden soll.The type, or a base type, of the custom attribute to search for.

Gibt zurück

Ein Attribute-Array mit den benutzerdefinierten Attributen vom Typ type, die für element übernommen werden, oder ein leeres Array, wenn keine benutzerdefinierten Attribute vorhanden sind.An Attribute array that contains the custom attributes of type type applied to element, or an empty array if no such custom attributes exist.

Ausnahmen

element oder type ist null.element or type is null.

type ist nicht von Attribute abgeleitet.type is not derived from Attribute.

element ist kein Konstruktor, keine Methode, keine Eigenschaft, kein Ereignis, kein Typ und kein Feld.element is not a constructor, method, property, event, type, or field.

Ein benutzerdefinierter Attributtyp kann nicht geladen werden.A custom attribute type cannot be loaded.

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von GetCustomAttribute, wobei eine MemberInfo als Parameter.The following code example demonstrates the use of GetCustomAttribute, taking a MemberInfo as a parameter.

using namespace System;
using namespace System::Reflection;
using namespace System::Security;
using namespace System::Runtime::InteropServices;

namespace CustAttrs4CS
{
   // Create a class for Win32 imported unmanaged functions.
   public ref class Win32
   {
   public:

      [DllImport("user32.dll", CharSet = CharSet::Unicode)]
      static int MessageBox( int hWnd, String^ text, String^ caption, UInt32 type );
   };

   public ref class AClass
   {
   public:

      // Add some attributes to the Win32CallMethod.

      [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
      void Win32CallMethod()
      {
         Win32::MessageBox( 0, "This is an unmanaged call.", "Be Careful!", 0 );
      }

   };

   ref class DemoClass
   {
   public:
      static void Main()
      {
         // Get the Class type to access its metadata.
         Type^ clsType = AClass::typeid;

         // Get the type information for the Win32CallMethod.
         MethodInfo^ mInfo = clsType->GetMethod( "Win32CallMethod" );
         if ( mInfo != nullptr )
         {
            // Iterate through all the attributes for the method.
            System::Collections::IEnumerator^ myEnum3 = Attribute::GetCustomAttributes( mInfo )->GetEnumerator();
            while ( myEnum3->MoveNext() )
            {
               Attribute^ attr = safe_cast<Attribute^>(myEnum3->Current);

               // Check for the Obsolete attribute.
               if ( attr->GetType() == ObsoleteAttribute::typeid )
               {
                  Console::WriteLine( "Method {0} is obsolete. "
                  "The message is:", mInfo->Name );
                  Console::WriteLine( (dynamic_cast<ObsoleteAttribute^>(attr))->Message );
               }
               // Check for the SuppressUnmanagedCodeSecurity attribute.
               else

               // Check for the SuppressUnmanagedCodeSecurity attribute.
               if ( attr->GetType() == SuppressUnmanagedCodeSecurityAttribute::typeid )
               {
                  Console::WriteLine( "This method calls unmanaged code "
                  "with no security check." );
                  Console::WriteLine( "Please do not use unless absolutely necessary." );
                  AClass^ myCls = gcnew AClass;
                  myCls->Win32CallMethod();
               }
            }
         }
      }
   };
}


/*
 * Output:
 * Method Win32CallMethod is obsolete. The message is:
 * This method is obsolete. Use managed MsgBox instead.
 * This method calls unmanaged code with no security check.
 * Please do not use unless absolutely necessary.
 */
using System;
using System.Reflection;
using System.Security;
using System.Runtime.InteropServices;

namespace CustAttrs4CS
{

    // Define an enumeration of Win32 unmanaged types
    public enum UnmanagedType
    {
        User,
        GDI,
        Kernel,
        Shell,
        Networking,
        Multimedia
    }

    // Define the Unmanaged attribute.
    public class UnmanagedAttribute : Attribute
    {
        // Storage for the UnmanagedType value.
        protected UnmanagedType thisType;

        // Set the unmanaged type in the constructor.
        public UnmanagedAttribute(UnmanagedType type)
        {
            thisType = type;
        }

        // Define a property to get and set the UnmanagedType value.
        public UnmanagedType Win32Type
        {
            get { return thisType; }
            set { thisType = Win32Type; }
        }
    }

    // Create a class for an imported Win32 unmanaged function.
    public class Win32 {
        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        public static extern int MessageBox(int hWnd, String text,
            String caption, uint type);
    }

    public class AClass {
        // Add some attributes to Win32CallMethod.
        [Obsolete("This method is obsolete. Use managed MsgBox instead.")]
        [Unmanaged(UnmanagedType.User)]
        public void Win32CallMethod()
        {
            Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0);
        }
    }

    class DemoClass {
        static void Main(string[] args)
            {
            // Get the AClass type to access its metadata.
            Type clsType = typeof(AClass);
            // Get the type information for Win32CallMethod.
            MethodInfo mInfo = clsType.GetMethod("Win32CallMethod");
            if (mInfo != null)
            {
                // Iterate through all the attributes of the method.
                foreach(Attribute attr in
                    Attribute.GetCustomAttributes(mInfo)) {
                    // Check for the Obsolete attribute.
                    if (attr.GetType() == typeof(ObsoleteAttribute))
                    {
                        Console.WriteLine("Method {0} is obsolete. " +
                            "The message is:",
                            mInfo.Name);
                        Console.WriteLine("  \"{0}\"",
                            ((ObsoleteAttribute)attr).Message);
                    }

                    // Check for the Unmanaged attribute.
                    else if (attr.GetType() == typeof(UnmanagedAttribute))
                    {
                        Console.WriteLine(
                            "This method calls unmanaged code.");
                        Console.WriteLine(
                            String.Format("The Unmanaged attribute type is {0}.",
                                          ((UnmanagedAttribute)attr).Win32Type));
                        AClass myCls = new AClass();
                        myCls.Win32CallMethod();
                    }
                }
            }
        }
    }
}

/*

This code example produces the following results.

First, the compilation yields the warning, "...This method is
obsolete. Use managed MsgBox instead."
Second, execution yields a message box with a title of "Caution!"
and message text of "This is an unmanaged call."
Third, the following text is displayed in the console window:

Method Win32CallMethod is obsolete. The message is:
  "This method is obsolete. Use managed MsgBox instead."
This method calls unmanaged code.
The Unmanaged attribute type is User.

*/

Imports System
Imports System.Reflection
Imports System.Security
Imports System.Runtime.InteropServices

' Define an enumeration of Win32 unmanaged types
Public Enum UnmanagedType
    User
    GDI
    Kernel
    Shell
    Networking
    Multimedia
End Enum 'UnmanagedType

' Define the Unmanaged attribute.
Public Class UnmanagedAttribute 
             Inherits Attribute

    ' Storage for the UnmanagedType value.
    Protected thisType As UnmanagedType
    
    ' Set the unmanaged type in the constructor.
    Public Sub New(ByVal type As UnmanagedType) 
        thisType = type
    End Sub 'New
    
    ' Define a property to get and set the UnmanagedType value.
    Public Property Win32Type() As UnmanagedType 
        Get
            Return thisType
        End Get
        Set
            thisType = Win32Type
        End Set
    End Property
End Class 'UnmanagedAttribute 

' Create a class for an imported Win32 unmanaged function.
Public Class Win32
    <DllImport("user32.dll", CharSet:=CharSet.Unicode)> _
    Public Shared Function MessageBox(ByVal hWnd As Integer, _
                                      ByVal Text As String, _
                                      ByVal caption As String, _
                                      ByVal type As Integer) As Integer
    End Function 'MessageBox
End Class 'Win32

Public Class AClass
    ' Add some attributes to Win32CallMethod.
    <Obsolete("This method is obsolete. Use managed MsgBox instead."), _
     Unmanaged(UnmanagedType.User)>  _
    Public Sub Win32CallMethod() 
        Win32.MessageBox(0, "This is an unmanaged call.", "Caution!", 0)    
    End Sub 'Win32CallMethod
End Class 'AClass

Class DemoClass
    Shared Sub Main(ByVal args() As String) 
        ' Get the AClass type to access its metadata.
        Dim clsType As Type = GetType(AClass)
        ' Get the type information for Win32CallMethod.
        Dim mInfo As MethodInfo = clsType.GetMethod("Win32CallMethod")
        If Not (mInfo Is Nothing) Then
            ' Iterate through all the attributes of the method.
            Dim attr As Attribute
            For Each attr In  Attribute.GetCustomAttributes(mInfo)
                ' Check for the Obsolete attribute.
                If attr.GetType().Equals(GetType(ObsoleteAttribute)) Then
                    Console.WriteLine("Method {0} is obsolete. The message is:", mInfo.Name)
                    Console.WriteLine("  ""{0}""", CType(attr, ObsoleteAttribute).Message)
                ' Check for the Unmanaged attribute.
                ElseIf attr.GetType().Equals(GetType(UnmanagedAttribute)) Then
                    Console.WriteLine("This method calls unmanaged code.")
                    Console.WriteLine( _
                            String.Format("The Unmanaged attribute type is {0}.", _
                            CType(attr, UnmanagedAttribute).Win32Type))
                    Dim myCls As New AClass()
                    myCls.Win32CallMethod()
                End If
            Next attr
        End If
    End Sub 'Main
End Class 'DemoClass

'
'This code example produces the following results. 
'
'First, the compilation yields the warning, "...This method is 
'obsolete. Use managed MsgBox instead."
'Second, execution yields a message box with a title of "Caution!" 
'and message text of "This is an unmanaged call." 
'Third, the following text is displayed in the console window:
'
'Method Win32CallMethod is obsolete. The message is:
'  "This method is obsolete. Use managed MsgBox instead."
'This method calls unmanaged code.
'The Unmanaged attribute type is User.
' 

Hinweise

Der Rückgabewert enthält die benutzerdefinierten Attribute für frühere Versionen von element.The return value contains the custom attributes for ancestors of element.

Hinweis

Ab .NET Framework, Version 2.0, gibt diese Methode für Methoden, Konstruktoren und Typen von Sicherheitsattributen zurück, wenn die Attribute in der neuen Metadatenformat gespeichert werden.Starting with the .NET Framework version 2.0, this method returns security attributes on methods, constructors, and types if the attributes are stored in the new metadata format. Mit Version 2.0 oder höher kompilierte Assemblys werden das neue Format verwenden.Assemblies compiled with version 2.0 or later use the new format. Verwenden dynamische Assemblys und Assemblys, die mit früheren Versionen von .NET Framework kompiliert die alte XML-Format.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. Finden Sie unter Ausgeben von deklarativen Sicherheitsattributen.See Emitting Declarative Security Attributes.

Gilt für: