Module.IsDefined(Type, Boolean) Metoda

Definice

Vrátí hodnotu, která označuje, zda byl zadaný typ atributu použit pro tento modul.Returns a value that indicates whether the specified attribute type has been applied to this module.

public:
 virtual bool IsDefined(Type ^ attributeType, bool inherit);
public virtual bool IsDefined (Type attributeType, bool inherit);
abstract member IsDefined : Type * bool -> bool
override this.IsDefined : Type * bool -> bool
Public Overridable Function IsDefined (attributeType As Type, inherit As Boolean) As Boolean

Parametry

attributeType
Type

Typ vlastního atributu, který se má testovat.The type of custom attribute to test for.

inherit
Boolean

Tento argument je ignorován pro objekty tohoto typu.This argument is ignored for objects of this type.

Návraty

true, jestli se v tomto modulu nastavila jedna nebo víc instancí attributeType; v opačném případě false.true if one or more instances of attributeType have been applied to this module; otherwise, false.

Implementuje

Výjimky

attributeType je null.attributeType is null.

attributeType není objekt Type dodaný modulem runtime.attributeType is not a Type object supplied by the runtime. Například attributeType je objekt TypeBuilder.For example, attributeType is a TypeBuilder object.

Příklady

Následující příklad ukazuje použití metody IsDefined.The following example demonstrates a use of the IsDefined method.

using namespace System;
using namespace System::Reflection;

namespace ReflectionModule_Examples
{

   //A very simple custom attribute.

   [AttributeUsage(AttributeTargets::Class|AttributeTargets::Module)]
   public ref class MySimpleAttribute: public Attribute
   {
   private:
      String^ name;

   public:
      MySimpleAttribute( String^ newName )
      {
         name = newName;
      }

   };

}


//Define a module-level attribute.

[module:ReflectionModule_Examples::MySimpleAttribute("module-level")];
int main()
{
   array<System::Reflection::Module^>^moduleArray;
   moduleArray = ReflectionModule_Examples::MySimpleAttribute::typeid->Assembly->GetModules( false );
   
   //In a simple project with only one module, the module at index
   // 0 will be the module containing these classes.
   System::Reflection::Module^ myModule = moduleArray[ 0 ];
   Type^ myType;
   myType = myModule->GetType( "ReflectionModule_Examples.MySimpleAttribute" );
   Console::WriteLine( "IsDefined(MySimpleAttribute) = {0}", myModule->IsDefined( myType, false ) );
}

using System;
using System.Reflection;

//Define a module-level attribute.
[module: ReflectionModule_Examples.MySimpleAttribute("module-level")]

namespace ReflectionModule_Examples
{
    class MyMainClass
    {
        static void Main()
        {
            Module[] moduleArray;
            
            moduleArray = typeof(MyMainClass).Assembly.GetModules(false);
            
            //In a simple project with only one module, the module at index
            // 0 will be the module containing these classes.
            Module myModule = moduleArray[0];

            Type myType;
            myType = myModule.GetType("ReflectionModule_Examples.MySimpleAttribute");
            Console.WriteLine("IsDefined(MySimpleAttribute) = {0}", myModule.IsDefined(myType, false));
        }
    }

    //A very simple custom attribute.
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Module)]
    public class MySimpleAttribute : Attribute
    {
        private string name;

        public MySimpleAttribute(string newName)
        {
            name = newName;
        }
    }
}
Imports System.Reflection

'Define a module-level attribute.
<Module: ReflectionModule_Examples.MySimpleAttribute("module-level")> 

'Define a module-level attribute.
Namespace ReflectionModule_Examples
    Class MyMainClass
        Shared Sub Main()
            Dim moduleArray() As [Module]

            moduleArray = GetType(MyMainClass).Assembly.GetModules(False)

            'In a simple project with only one module, the module at index
            ' 0 will be the module containing these classes.
            Dim myModule As [Module] = moduleArray(0)

            Dim myType As Type
            myType = myModule.GetType("ReflectionModule_Examples.MySimpleAttribute")
            Console.WriteLine("IsDefined(MySimpleAttribute) = {0}", myModule.IsDefined(myType, False))
        End Sub
    End Class

    'A very simple custom attribute.
    <AttributeUsage(AttributeTargets.Class Or AttributeTargets.Module)> _
    Public Class MySimpleAttribute
        Inherits Attribute
        Private name As String

        Public Sub New(ByVal newName As String)
            name = newName
        End Sub
    End Class
End Namespace 'ReflectionModule_Examples

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