CustomAttributeData 클래스

정의

리플렉션 전용 컨텍스트에 로드되는 어셈블리, 모듈, 형식, 멤버 및 매개 변수에 대한 사용자 지정 특성 데이터에 액세스할 수 있도록 해줍니다.Provides access to custom attribute data for assemblies, modules, types, members and parameters that are loaded into the reflection-only context.

public ref class CustomAttributeData
public ref class CustomAttributeData sealed
public class CustomAttributeData
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public sealed class CustomAttributeData
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CustomAttributeData
type CustomAttributeData = class
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CustomAttributeData = class
Public Class CustomAttributeData
Public NotInheritable Class CustomAttributeData
상속
CustomAttributeData
특성

예제

다음 예제에서는 네 개의 생성자와 4 개의 속성이 있는 사용자 지정 특성을 정의 합니다.The following example defines a custom attribute with four constructors and four properties. 두 속성은 읽기 전용 이며 생성자의 위치 매개 변수를 사용 하 여 설정 됩니다.Two of the properties are read-only, and are set by using the positional parameters of the constructors. 다른 두 속성은 읽기/쓰기 이며 명명 된 인수를 사용 해야만 설정할 수 있습니다.The other two properties are read/write, and can be set only by using named arguments. 한 위치 속성은 문자열 배열이 고, 하나의 명명 된 속성은 정수 배열입니다.One positional property is an array of strings, and one named property is an array of integers.

어셈블리, 어셈블리에 선언된 형식, 형식의 메서드, 메서드의 매개 변수에 특성이 적용됩니다.The attribute is applied to the assembly, to a type declared in the assembly, to a method of the type, and to a parameter of the method. 이러한 경우에는 여러 생성자가 사용 됩니다.Different constructors are used for these cases. 어셈블리가 실행 될 때 어셈블리가 리플렉션 전용 컨텍스트에 로드 되 고, 해당 어셈블리에 적용 된 사용자 지정 특성과 여기에 포함 된 형식 및 멤버에 대 한 정보를 표시 합니다.When executed, the assembly loads itself into the reflection-only context and displays information about the custom attributes that were applied to it and to the type and members it contains.

형식에 적용 되는 특성은 위치 및 명명 된 인수를 사용 하 여 배열 속성을 보여 줍니다.The attribute that is applied to the type demonstrates array properties, with both positional and named arguments.

using namespace System;
using namespace System::Reflection;
using namespace System::Collections::Generic;
using namespace System::Collections::ObjectModel;

// An enumeration used by the ExampleAttribute class.
public enum class ExampleKind
{
   FirstKind, SecondKind, ThirdKind, FourthKind
};

// An example attribute. The attribute can be applied to all
// targets, from assemblies to parameters.
//
[AttributeUsage(AttributeTargets::All)]
public ref class ExampleAttribute: public Attribute
{
private:
   // Data for properties.
   ExampleKind kindValue;
   String^ noteValue;
   array<String^>^ arrayStrings;
   array<int>^ arrayNumbers;

   // Constructors. 
   void ExampleAttributeInitialize( ExampleKind initKind, array<String^>^ initStrings )
   {
      kindValue = initKind;
      arrayStrings = initStrings;
   }
public:
   ExampleAttribute()
   {
      ExampleAttributeInitialize( ExampleKind::FirstKind, nullptr );
   }
   ExampleAttribute( ExampleKind initKind )
   {
      ExampleAttributeInitialize( initKind, nullptr );
   }
   ExampleAttribute( ExampleKind initKind, array<String^>^ initStrings )
   {
      ExampleAttributeInitialize( initKind, initStrings );
   }

   // Properties. The Note and Numbers properties must be read/write, so they
   // can be used as named parameters.
   //
   property ExampleKind Kind 
   {
      ExampleKind get()
      {
         return kindValue;
      }
   }
   property array<String^>^ Strings
   {
      array<String^>^ get()
      {
         return arrayStrings;
      }
   }
   property String^ Note 
   {
      String^ get()
      {
         return noteValue;
      }

      void set( String^ value )
      {
         noteValue = value;
      }
   }
   property array<int>^ Numbers
   {
      array<int>^ get()
      {
         return arrayNumbers;
      }

      void set( array<int>^ value )
      {
         arrayNumbers = value;
      }
   }
};

// The example attribute is applied to the assembly.
[assembly:Example(ExampleKind::ThirdKind,Note="This is a note on the assembly.")];

// The example attribute is applied to the test class.
//
[Example(ExampleKind::SecondKind, 
         gcnew array<String^> { "String array argument, line 1", 
                        "String array argument, line 2", 
                        "String array argument, line 3" }, 
         Note="This is a note on the class.",
         Numbers = gcnew array<int> { 53, 57, 59 })] 
public ref class Test
{
public:
   // The example attribute is applied to a method, using the
   // parameterless constructor and supplying a named argument.
   // The attribute is also applied to the method parameter.
   //
   [Example(Note="This is a note on a method.")]
   void TestMethod( [Example] Object^ arg ){}

   // Main() gets objects representing the assembly, the test
   // type, the test method, and the method parameter. Custom
   // attribute data is displayed for each of these.
   //
   static void Main()
   {
      Assembly^ assembly = Assembly::ReflectionOnlyLoad( "Source" );
      Type^ t = assembly->GetType( "Test" );
      MethodInfo^ m = t->GetMethod( "TestMethod" );
      array<ParameterInfo^>^p = m->GetParameters();

      Console::WriteLine( "\r\nAttributes for assembly: '{0}'", assembly );
      ShowAttributeData( CustomAttributeData::GetCustomAttributes( assembly ) );
      Console::WriteLine( "\r\nAttributes for type: '{0}'", t );
      ShowAttributeData( CustomAttributeData::GetCustomAttributes( t ) );
      Console::WriteLine( "\r\nAttributes for member: '{0}'", m );
      ShowAttributeData( CustomAttributeData::GetCustomAttributes( m ) );
      Console::WriteLine( "\r\nAttributes for parameter: '{0}'", p );
      ShowAttributeData( CustomAttributeData::GetCustomAttributes( p[ 0 ] ) );
   }

private:
    static void ShowValueOrArray(CustomAttributeTypedArgument^ cata)
    {
        if (cata->Value->GetType() == ReadOnlyCollection<CustomAttributeTypedArgument>::typeid)
        {
            Console::WriteLine("         Array of '{0}':", cata->ArgumentType);

            for each (CustomAttributeTypedArgument^ cataElement in 
                (ReadOnlyCollection<CustomAttributeTypedArgument>^) cata->Value)
            {
                Console::WriteLine("             Type: '{0}'  Value: '{1}'",
                    cataElement->ArgumentType, cataElement->Value);
            }
        }
        else
        {
            Console::WriteLine( "         Type: '{0}'  Value: '{1}'",
               cata->ArgumentType, cata->Value );
        }
    }

   static void ShowAttributeData( IList< CustomAttributeData^ >^ attributes )
   {
      for each ( CustomAttributeData^ cad in attributes )
      {
         Console::WriteLine( "   {0}", cad );
         Console::WriteLine( "      Constructor: '{0}'", cad->Constructor );

         Console::WriteLine( "      Constructor arguments:" );
         for each ( CustomAttributeTypedArgument^ cata in cad->ConstructorArguments )
         {
            ShowValueOrArray(cata);
         }

         Console::WriteLine( "      Named arguments:" );
         for each ( CustomAttributeNamedArgument cana in cad->NamedArguments )
         {
            Console::WriteLine( "         MemberInfo: '{0}'", cana.MemberInfo );
            ShowValueOrArray(cana.TypedValue);
         }
      }
   }
};

int main()
{
   Test::Main();
}

/* This code example produces output similar to the following:

Attributes for assembly: 'source, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
   [System.Runtime.CompilerServices.CompilationRelaxationsAttribute((Int32)8)]
      Constructor: 'Void .ctor(Int32)'
      Constructor arguments:
         Type: 'System.Int32'  Value: '8'
      Named arguments:
   [System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows = True)]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
         MemberInfo: 'Boolean WrapNonExceptionThrows'
         Type: 'System.Boolean'  Value: 'True'
   [ExampleAttribute((ExampleKind)2, Note = "This is a note on the assembly.")]
      Constructor: 'Void .ctor(ExampleKind)'
      Constructor arguments:
         Type: 'ExampleKind'  Value: '2'
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on the assembly.'

Attributes for type: 'Test'
   [ExampleAttribute((ExampleKind)1, new String[3] { "String array argument, line 1", "String array argument, line 2", "String array argument, line 3" }, Note = "This is a note on the class.", Numbers = new Int32[3] { 53, 57, 59 })]
      Constructor: 'Void .ctor(ExampleKind, System.String[])'
      Constructor arguments:
         Type: 'ExampleKind'  Value: '1'
         Array of 'System.String[]':
             Type: 'System.String'  Value: 'String array argument, line 1'
             Type: 'System.String'  Value: 'String array argument, line 2'
             Type: 'System.String'  Value: 'String array argument, line 3'
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on the class.'
         MemberInfo: 'Int32[] Numbers'
         Array of 'System.Int32[]':
             Type: 'System.Int32'  Value: '53'
             Type: 'System.Int32'  Value: '57'
             Type: 'System.Int32'  Value: '59'

Attributes for member: 'Void TestMethod(System.Object)'
   [ExampleAttribute(Note = "This is a note on a method.")]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on a method.'

Attributes for parameter: 'System.Object arg'
   [ExampleAttribute()]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
*/
using System;
using System.Reflection;
using System.Collections.Generic;
using System.Collections.ObjectModel;

// The example attribute is applied to the assembly.
[assembly:Example(ExampleKind.ThirdKind, Note="This is a note on the assembly.")]

// An enumeration used by the ExampleAttribute class.
public enum ExampleKind
{
    FirstKind,
    SecondKind,
    ThirdKind,
    FourthKind
};

// An example attribute. The attribute can be applied to all
// targets, from assemblies to parameters.
//
[AttributeUsage(AttributeTargets.All)]
public class ExampleAttribute : Attribute
{
    // Data for properties.
    private ExampleKind kindValue;
    private string noteValue;
    private string[] arrayStrings;
    private int[] arrayNumbers;

    // Constructors. The parameterless constructor (.ctor) calls
    // the constructor that specifies ExampleKind and an array of
    // strings, and supplies the default values.
    //
    public ExampleAttribute(ExampleKind initKind, string[] initStrings)
    {
        kindValue = initKind;
        arrayStrings = initStrings;
    }
    public ExampleAttribute(ExampleKind initKind) : this(initKind, null) {}
    public ExampleAttribute() : this(ExampleKind.FirstKind, null) {}

    // Properties. The Note and Numbers properties must be read/write, so they
    // can be used as named parameters.
    //
    public ExampleKind Kind { get { return kindValue; }}
    public string[] Strings { get { return arrayStrings; }}
    public string Note
    {
        get { return noteValue; }
        set { noteValue = value; }
    }
    public int[] Numbers
    {
        get { return arrayNumbers; }
        set { arrayNumbers = value; }
    }
}

// The example attribute is applied to the test class.
//
[Example(ExampleKind.SecondKind,
         new string[] { "String array argument, line 1",
                        "String array argument, line 2",
                        "String array argument, line 3" },
         Note="This is a note on the class.",
         Numbers = new int[] { 53, 57, 59 })]
public class Test
{
    // The example attribute is applied to a method, using the
    // parameterless constructor and supplying a named argument.
    // The attribute is also applied to the method parameter.
    //
    [Example(Note="This is a note on a method.")]
    public void TestMethod([Example] object arg) { }

    // Main() gets objects representing the assembly, the test
    // type, the test method, and the method parameter. Custom
    // attribute data is displayed for each of these.
    //
    public static void Main()
    {
        Assembly asm = Assembly.ReflectionOnlyLoad("Source");
        Type t = asm.GetType("Test");
        MethodInfo m = t.GetMethod("TestMethod");
        ParameterInfo[] p = m.GetParameters();

        Console.WriteLine("\r\nAttributes for assembly: '{0}'", asm);
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(asm));
        Console.WriteLine("\r\nAttributes for type: '{0}'", t);
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(t));
        Console.WriteLine("\r\nAttributes for member: '{0}'", m);
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(m));
        Console.WriteLine("\r\nAttributes for parameter: '{0}'", p);
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(p[0]));
    }

    private static void ShowAttributeData(
        IList<CustomAttributeData> attributes)
    {
        foreach( CustomAttributeData cad in attributes )
        {
            Console.WriteLine("   {0}", cad);
            Console.WriteLine("      Constructor: '{0}'", cad.Constructor);

            Console.WriteLine("      Constructor arguments:");
            foreach( CustomAttributeTypedArgument cata
                in cad.ConstructorArguments )
            {
                ShowValueOrArray(cata);
            }

            Console.WriteLine("      Named arguments:");
            foreach( CustomAttributeNamedArgument cana
                in cad.NamedArguments )
            {
                Console.WriteLine("         MemberInfo: '{0}'",
                    cana.MemberInfo);
                ShowValueOrArray(cana.TypedValue);
            }
        }
    }

    private static void ShowValueOrArray(CustomAttributeTypedArgument cata)
    {
        if (cata.Value.GetType() == typeof(ReadOnlyCollection<CustomAttributeTypedArgument>))
        {
            Console.WriteLine("         Array of '{0}':", cata.ArgumentType);

            foreach (CustomAttributeTypedArgument cataElement in
                (ReadOnlyCollection<CustomAttributeTypedArgument>) cata.Value)
            {
                Console.WriteLine("             Type: '{0}'  Value: '{1}'",
                    cataElement.ArgumentType, cataElement.Value);
            }
        }
        else
        {
            Console.WriteLine("         Type: '{0}'  Value: '{1}'",
                cata.ArgumentType, cata.Value);
        }
    }
}

/* This code example produces output similar to the following:

Attributes for assembly: 'source, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
   [System.Runtime.CompilerServices.CompilationRelaxationsAttribute((Int32)8)]
      Constructor: 'Void .ctor(Int32)'
      Constructor arguments:
         Type: 'System.Int32'  Value: '8'
      Named arguments:
   [System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows = True)]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
         MemberInfo: 'Boolean WrapNonExceptionThrows'
         Type: 'System.Boolean'  Value: 'True'
   [ExampleAttribute((ExampleKind)2, Note = "This is a note on the assembly.")]
      Constructor: 'Void .ctor(ExampleKind)'
      Constructor arguments:
         Type: 'ExampleKind'  Value: '2'
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on the assembly.'

Attributes for type: 'Test'
   [ExampleAttribute((ExampleKind)1, new String[3] { "String array argument, line 1", "String array argument, line 2", "String array argument, line 3" }, Note = "This is a note on the class.", Numbers = new Int32[3] { 53, 57, 59 })]
      Constructor: 'Void .ctor(ExampleKind, System.String[])'
      Constructor arguments:
         Type: 'ExampleKind'  Value: '1'
         Array of 'System.String[]':
             Type: 'System.String'  Value: 'String array argument, line 1'
             Type: 'System.String'  Value: 'String array argument, line 2'
             Type: 'System.String'  Value: 'String array argument, line 3'
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on the class.'
         MemberInfo: 'Int32[] Numbers'
         Array of 'System.Int32[]':
             Type: 'System.Int32'  Value: '53'
             Type: 'System.Int32'  Value: '57'
             Type: 'System.Int32'  Value: '59'

Attributes for member: 'Void TestMethod(System.Object)'
   [ExampleAttribute(Note = "This is a note on a method.")]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
         MemberInfo: 'System.String Note'
         Type: 'System.String'  Value: 'This is a note on a method.'

Attributes for parameter: 'System.Object arg'
   [ExampleAttribute()]
      Constructor: 'Void .ctor()'
      Constructor arguments:
      Named arguments:
*/
Imports System.Reflection
Imports System.Collections.Generic
Imports System.Collections.ObjectModel

' The example attribute is applied to the assembly.
<Assembly:Example(ExampleKind.ThirdKind, Note:="This is a note on the assembly.")>

' An enumeration used by the ExampleAttribute class.
Public Enum ExampleKind
    FirstKind
    SecondKind
    ThirdKind
    FourthKind
End Enum

' An example attribute. The attribute can be applied to all
' targets, from assemblies to parameters.
'
<AttributeUsage(AttributeTargets.All)> _
Public Class ExampleAttribute
    Inherits Attribute

    ' Data for properties.
    Private kindValue As ExampleKind
    Private noteValue As String
    Private arrayStrings() As String
    Private arrayNumbers() As Integer

    ' Constructors. The parameterless constructor (.ctor) calls
    ' the constructor that specifies ExampleKind and an array of
    ' strings, and supplies the default values.
    '
    Public Sub New(ByVal initKind As ExampleKind, ByVal initStrings() As String)
        kindValue = initKind
        arrayStrings = initStrings
    End Sub
    Public Sub New(ByVal initKind As ExampleKind)
        Me.New(initKind, Nothing)
    End Sub
    Public Sub New()
        Me.New(ExampleKind.FirstKind, Nothing)
    End Sub

    ' Properties. The Note and Numbers properties must be read/write, so they 
    ' can be used as named parameters.
    '
    Public ReadOnly Property Kind As ExampleKind
        Get
            Return kindValue 
        End Get
    End Property
    Public ReadOnly Property Strings As String()
        Get
            Return arrayStrings 
        End Get
    End Property
    Public Property Note As String
        Get
            Return noteValue 
        End Get
        Set
            noteValue = value
        End Set
    End Property
    Public Property Numbers As Integer()
        Get
            Return arrayNumbers 
        End Get
        Set
            arrayNumbers = value
        End Set
    End Property
End Class

' The example attribute is applied to the test class.
'
<Example(ExampleKind.SecondKind, _
         New String() { "String array argument, line 1", _
                        "String array argument, line 2", _
                        "String array argument, line 3" }, _
         Note := "This is a note on the class.", _
         Numbers := New Integer() { 53, 57, 59 })> _
Public Class Test
    ' The example attribute is applied to a method, using the
    ' parameterless constructor and supplying a named argument.
    ' The attribute is also applied to the method parameter.
    '
    <Example(Note:="This is a note on a method.")> _
    Public Sub TestMethod(<Example()> ByVal arg As Object)
    End Sub

    ' Sub Main gets objects representing the assembly, the test
    ' type, the test method, and the method parameter. Custom
    ' attribute data is displayed for each of these.
    '
    Public Shared Sub Main()
        Dim asm As [Assembly] = Assembly.ReflectionOnlyLoad("source")
        Dim t As Type = asm.GetType("Test")
        Dim m As MethodInfo = t.GetMethod("TestMethod")
        Dim p() As ParameterInfo = m.GetParameters()

        Console.WriteLine(vbCrLf & "Attributes for assembly: '{0}'", asm)
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(asm))
        Console.WriteLine(vbCrLf & "Attributes for type: '{0}'", t)
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(t))
        Console.WriteLine(vbCrLf & "Attributes for member: '{0}'", m)
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(m))
        Console.WriteLine(vbCrLf & "Attributes for parameter: '{0}'", p)
        ShowAttributeData(CustomAttributeData.GetCustomAttributes(p(0)))
    End Sub

    Private Shared Sub ShowAttributeData( _
        ByVal attributes As IList(Of CustomAttributeData))

        For Each cad As CustomAttributeData _
            In CType(attributes, IEnumerable(Of CustomAttributeData))

            Console.WriteLine("   {0}", cad)
            Console.WriteLine("      Constructor: '{0}'", cad.Constructor)

            Console.WriteLine("      Constructor arguments:")
            For Each cata As CustomAttributeTypedArgument _
                In CType(cad.ConstructorArguments, IEnumerable(Of CustomAttributeTypedArgument))

                ShowValueOrArray(cata)
            Next

            Console.WriteLine("      Named arguments:")
            For Each cana As CustomAttributeNamedArgument _
                In CType(cad.NamedArguments, IEnumerable(Of CustomAttributeNamedArgument))

                Console.WriteLine("         MemberInfo: '{0}'", _
                    cana.MemberInfo)
                ShowValueOrArray(cana.TypedValue)
            Next
        Next
    End Sub

    Private Shared Sub ShowValueOrArray(ByVal cata As CustomAttributeTypedArgument)
        If cata.Value.GetType() Is GetType(ReadOnlyCollection(Of CustomAttributeTypedArgument)) Then
            Console.WriteLine("         Array of '{0}':", cata.ArgumentType)

            For Each cataElement As CustomAttributeTypedArgument In cata.Value
                Console.WriteLine("             Type: '{0}'  Value: '{1}'", _
                    cataElement.ArgumentType, cataElement.Value)
            Next
        Else
            Console.WriteLine("         Type: '{0}'  Value: '{1}'", _
                cata.ArgumentType, cata.Value)
        End If       
    End Sub
End Class

' This code example produces output similar to the following:
'
'Attributes for assembly: 'source, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
'   [System.Runtime.CompilerServices.CompilationRelaxationsAttribute((Int32)8)]
'      Constructor: 'Void .ctor(Int32)'
'      Constructor arguments:
'         Type: 'System.Int32'  Value: '8'
'      Named arguments:
'   [System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows = True)]
'      Constructor: 'Void .ctor()'
'      Constructor arguments:
'      Named arguments:
'         MemberInfo: 'Boolean WrapNonExceptionThrows'
'         Type: 'System.Boolean'  Value: 'True'
'   [ExampleAttribute((ExampleKind)2, Note = "This is a note on the assembly.")]
'      Constructor: 'Void .ctor(ExampleKind)'
'      Constructor arguments:
'         Type: 'ExampleKind'  Value: '2'
'      Named arguments:
'         MemberInfo: 'System.String Note'
'         Type: 'System.String'  Value: 'This is a note on the assembly.'
'
'Attributes for type: 'Test'
'   [ExampleAttribute((ExampleKind)1, new String[3] { "String array argument, line 1", "String array argument, line 2", "String array argument, line 3" }, Note = "This is a note on the class.", Numbers = new Int32[3] { 53, 57, 59 })]
'      Constructor: 'Void .ctor(ExampleKind, System.String[])'
'      Constructor arguments:
'         Type: 'ExampleKind'  Value: '1'
'         Array of 'System.String[]':
'             Type: 'System.String'  Value: 'String array argument, line 1'
'             Type: 'System.String'  Value: 'String array argument, line 2'
'             Type: 'System.String'  Value: 'String array argument, line 3'
'      Named arguments:
'         MemberInfo: 'System.String Note'
'         Type: 'System.String'  Value: 'This is a note on the class.'
'         MemberInfo: 'Int32[] Numbers'
'         Array of 'System.Int32[]':
'             Type: 'System.Int32'  Value: '53'
'             Type: 'System.Int32'  Value: '57'
'             Type: 'System.Int32'  Value: '59'
'
'Attributes for member: 'Void TestMethod(System.Object)'
'   [ExampleAttribute(Note = "This is a note on a method.")]
'      Constructor: 'Void .ctor()'
'      Constructor arguments:
'      Named arguments:
'         MemberInfo: 'System.String Note'
'         Type: 'System.String'  Value: 'This is a note on a method.'
'
'Attributes for parameter: 'System.Object arg'
'   [ExampleAttribute()]
'      Constructor: 'Void .ctor()'
'      Constructor arguments:
'      Named arguments:

설명

리플렉션 전용 컨텍스트에서 검사 되는 코드는 실행할 수 없습니다. 따라서, 등의 메서드를 사용 하 여 해당 인스턴스를 만든 다음 해당 속성을 검사 하 여 사용자 지정 특성을 검사할 수 없습니다 Attribute.GetCustomAttributes MemberInfo.GetCustomAttributes .Code that is being examined in the reflection-only context cannot be executed, so it is not always possible to examine custom attributes by creating instances of them and then examining their properties, using methods like Attribute.GetCustomAttributes, MemberInfo.GetCustomAttributes, and so on. 특성 형식 자체에 대 한 코드를 리플렉션 전용 컨텍스트에 로드 하는 경우에는 실행할 수 없습니다.If the code for the attribute type itself is loaded into the reflection-only context, it cannot be executed.

CustomAttributeData클래스를 사용 하면 특성에 대 한 추상화를 제공 하 여 리플렉션 전용 컨텍스트에서 사용자 지정 특성을 검사할 수 있습니다.The CustomAttributeData class allows examination of custom attributes in the reflection-only context by providing an abstraction for attributes. 이 클래스의 멤버는 특성의 위치 인수 및 명명 된 인수를 가져오는 데 사용할 수 있습니다.The members of this class can be used to obtain the positional arguments and named arguments of the attribute. 속성을 사용 ConstructorArguments 하 여 CustomAttributeTypedArgument 위치 인수를 나타내는 구조체 목록을 가져온 다음 속성을 사용 하 여 NamedArguments 명명 된 인수를 CustomAttributeNamedArgument 나타내는 구조체 목록을 가져옵니다.Use the ConstructorArguments property to get a list of CustomAttributeTypedArgument structures that represent the positional arguments, and use the NamedArguments property to get a list of CustomAttributeNamedArgument structures that represent the named arguments.

참고

CustomAttributeNamedArgument구조는 인수 값을 가져오고 설정 하는 데 사용 되는 특성 속성에 대 한 정보만 제공 합니다.The CustomAttributeNamedArgument structure only provides information about the attribute property used to get and set the argument value. 인수의 형식과 값을 가져오려면 속성을 사용 하 여 구조체를 CustomAttributeNamedArgument.TypedValue 가져옵니다 CustomAttributeTypedArgument .To obtain the type and value of the argument, use the CustomAttributeNamedArgument.TypedValue property to obtain a CustomAttributeTypedArgument structure.

CustomAttributeTypedArgument명명 된 이름이 나 위치에 관계 없이 인수에 대 한 구조체를 사용 하는 경우 속성을 사용 하 여 형식을 가져오고 속성을 사용 하 여 CustomAttributeTypedArgument.ArgumentType CustomAttributeTypedArgument.Value 값을 가져옵니다.When you have a CustomAttributeTypedArgument structure for an argument, whether named or positional, use the CustomAttributeTypedArgument.ArgumentType property to get the type and the CustomAttributeTypedArgument.Value property to get the value.

참고

배열 인수의 경우 CustomAttributeTypedArgument.Value 속성은 개체의 제네릭을 반환 합니다 ReadOnlyCollection<T> CustomAttributeTypedArgument .For an array argument, the CustomAttributeTypedArgument.Value property returns a generic ReadOnlyCollection<T> of CustomAttributeTypedArgument objects. CustomAttributeTypedArgument컬렉션의 각 개체는 배열의 해당 요소를 나타냅니다.Each CustomAttributeTypedArgument object in the collection represents the corresponding element of the array.

CustomAttributeData 는 리플렉션 전용 컨텍스트에서 뿐만 아니라 실행 컨텍스트에서만 사용할 수 있습니다.CustomAttributeData can be used in the execution context as well as in the reflection-only context. 예를 들어 사용자 지정 특성에 대 한 코드를 포함 하는 어셈블리를 로드 하지 않을 수 있습니다.For example, you might want to avoid loading the assembly that contains the code for a custom attribute. 클래스를 사용 하 CustomAttributeData 는 것은와 같은 메서드를 사용 하는 것과 다릅니다 Attribute.GetCustomAttributes .Using the CustomAttributeData class is different from using methods like Attribute.GetCustomAttributes:

  • 의 속성 및 메서드는 CustomAttributeData 생성자의 의미 체계가 아니라 특성 인스턴스에 대해 지정 된 값만 제공 합니다.The properties and methods of CustomAttributeData only provide you with the values that were specified for the attribute instance, not the semantics of the constructor. 예를 들어 특성의 문자열 인수는 내부적으로 다른 표현으로 변환 되 고 정규 형식으로 반환 될 수 있습니다. 또는 실제 특성 코드가 실행 될 때 속성의 부작용이 발생할 수 있습니다.For example, a string argument of an attribute might be converted internally to some other representation, and returned in a canonical form; or a property might have side effects when the actual attribute code is executed.

  • 의 속성 및 메서드를 CustomAttributeData 사용 하 여 기본 클래스에서 상속 된 사용자 지정 특성을 검색할 수 없습니다.The properties and methods of CustomAttributeData do not allow you to retrieve the custom attributes inherited from base classes.

클래스의 인스턴스를 만들려면 CustomAttributeData static ( Shared Visual Basic) GetCustomAttributes 팩터리 메서드를 사용 합니다.To create instances of the CustomAttributeData class, use the static (Shared in Visual Basic) GetCustomAttributes factory methods.

생성자

CustomAttributeData()

CustomAttributeData 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the CustomAttributeData class.

속성

AttributeType

특성 유형을 가져옵니다.Gets the type of the attribute.

Constructor

사용자 지정 특성을 초기화하는 생성자를 나타내는 ConstructorInfo 개체를 가져옵니다.Gets a ConstructorInfo object that represents the constructor that would have initialized the custom attribute.

ConstructorArguments

CustomAttributeData 개체가 나타내는 특성 인스턴스에 지정된 위치 인수 목록을 가져옵니다.Gets the list of positional arguments specified for the attribute instance represented by the CustomAttributeData object.

NamedArguments

CustomAttributeData 개체가 나타내는 특성 인스턴스에 지정된 명명된 인수 목록을 가져옵니다.Gets the list of named arguments specified for the attribute instance represented by the CustomAttributeData object.

메서드

Equals(Object)

이 인스턴스가 지정된 개체와 같은지를 나타내는 값을 반환합니다.Returns a value that indicates whether this instance is equal to a specified object.

Equals(Object)

지정된 개체가 현재 개체와 같은지 확인합니다.Determines whether the specified object is equal to the current object.

(다음에서 상속됨 Object)
GetCustomAttributes(Assembly)

대상 어셈블리에 적용된 특성에 대한 데이터를 나타내는 CustomAttributeData 개체의 목록을 반환합니다.Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target assembly.

GetCustomAttributes(MemberInfo)

대상 멤버에 적용된 특성에 대한 데이터를 나타내는 CustomAttributeData 개체의 목록을 반환합니다.Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target member.

GetCustomAttributes(Module)

대상 모듈에 적용된 특성에 대한 데이터를 나타내는 CustomAttributeData 개체의 목록을 반환합니다.Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target module.

GetCustomAttributes(ParameterInfo)

대상 매개 변수에 적용된 특성에 대한 데이터를 나타내는 CustomAttributeData 개체의 목록을 반환합니다.Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target parameter.

GetHashCode()

특정 유형에 대한 해시 함수로 사용합니다.Serves as a hash function for a particular type.

GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(다음에서 상속됨 Object)
GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(다음에서 상속됨 Object)
MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(다음에서 상속됨 Object)
ToString()

사용자 지정 특성의 문자열 표현을 반환합니다.Returns a string representation of the custom attribute.

ToString()

현재 개체를 나타내는 문자열을 반환합니다.Returns a string that represents the current object.

(다음에서 상속됨 Object)

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