EnumBuilder.GetCustomAttributes Methode

Referenz

Definition

Namespace:: System.Reflection.Emit

Assembly:: System.Reflection.Emit.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Paket:: System.Reflection.Emit v4.7.0

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

Gibt die benutzerdefinierten Attribute zurück, die für diesen Konstruktor definiert sind.

Überlädt

GetCustomAttributes(Boolean)	Gibt alle benutzerdefinierten Attribute zurück, die für diesen Konstruktor definiert sind.
GetCustomAttributes(Type, Boolean)	Gibt die benutzerdefinierten Attribute zurück, die durch den angegebenen Typ identifiziert werden.

GetCustomAttributes(Boolean)

Quelle:: EnumBuilder.cs

Gibt alle benutzerdefinierten Attribute zurück, die für diesen Konstruktor definiert sind.

public:
 override cli::array <System::Object ^> ^ GetCustomAttributes(bool inherit);

public override object[] GetCustomAttributes (bool inherit);

override this.GetCustomAttributes : bool -> obj[]

Public Overrides Function GetCustomAttributes (inherit As Boolean) As Object()

Parameter

inherit: Boolean

Gibt an, ob die Vererbungskette dieses Members nach den Attributen durchsucht werden soll.

Gibt zurück

Object[]

Gibt ein Objektarray zurück, das alle benutzerdefinierten Attribute des Konstruktors darstellt, der von dieser ConstructorBuilder-Instanz dargestellt wird.

Ausnahmen

NotSupportedException

Diese Methode wird derzeit nicht in Typen unterstützt, die nicht abgeschlossen sind.

Hinweise

Um die benutzerdefinierten Attribute eines fertigen Typs abzurufen, rufen Sie als Problemumgehung den Typ mithilfe von Type.GetType ab, und rufen Sie GetCustomAttributes für den zurückgegebenen Typeauf.

Im folgenden Codebeispiel wird die Verwendung von GetCustomAttribute im Kontext von EnumBuilderveranschaulicht.

using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;

[AttributeUsage(AttributeTargets::All,AllowMultiple=false)]
public ref class MyAttribute: public Attribute
{
public:
   bool myBoolValue;
   MyAttribute( bool myBool )
   {
      this->myBoolValue = myBool;
   }
};

ref class MyApplication
{
private:
   static EnumBuilder^ myEnumBuilder;

public:
   static void Main()
   {
      try
      {
         CreateCallee( Thread::GetDomain() );
         array<Object^>^myAttributesArray = myEnumBuilder->GetCustomAttributes( true );
         
         // Read the attributes and display them on the console.
         Console::WriteLine( "Custom attribute contains: " );
         for ( int index = 0; index < myAttributesArray->Length; index++ )
         {
            if ( dynamic_cast<MyAttribute^>(myAttributesArray[ index ]) )
            {
               Console::WriteLine( "myBoolValue: {0}", (dynamic_cast<MyAttribute^>(myAttributesArray[ index ]))->myBoolValue );
            }
         }
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "The following exception is raised:{0}", e->Message );
      }

   }

private:
   static void CreateCallee( AppDomain^ domain )
   {
      AssemblyName^ myAssemblyName = gcnew AssemblyName;

      // Create a name for the assembly.
      myAssemblyName->Name = "EmittedAssembly";

      // Create the dynamic assembly.
      AssemblyBuilder^ myAssemblyBuilder = domain->DefineDynamicAssembly( myAssemblyName, AssemblyBuilderAccess::Run );
      Type^ myType = MyAttribute::typeid;
      array<Type^>^temp0 = {bool::typeid};
      ConstructorInfo^ myInfo = myType->GetConstructor( temp0 );

      // Create a dynamic module.
      ModuleBuilder^ myModuleBuilder = myAssemblyBuilder->DefineDynamicModule( "EmittedModule" );

      // Create a dynamic Enum.
      myEnumBuilder = myModuleBuilder->DefineEnum( "MyNamespace.MyEnum", TypeAttributes::Public, Int32::typeid );
      FieldBuilder^ myFieldBuilder1 = myEnumBuilder->DefineLiteral( "FieldOne", 1 );
      FieldBuilder^ myFieldBuilder2 = myEnumBuilder->DefineLiteral( "FieldTwo", 2 );
      myEnumBuilder->CreateType();
      array<Byte>^temp1 = {01,00,01};
      myEnumBuilder->SetCustomAttribute( myInfo, temp1 );
   }
};

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

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

[AttributeUsage(AttributeTargets.All, AllowMultiple = false)]
public class MyAttribute2 : Attribute
{
   public bool myBoolValue;

   public MyAttribute2(bool myBool)
   {
      this.myBoolValue = myBool;
   }
}

class MyApplication2
{
   static EnumBuilder myEnumBuilder;

   public static void Main()
   {
      try
      {
         CreateCallee(Thread.GetDomain());
         object[] myAttributesArray = myEnumBuilder.GetCustomAttributes(true);

         // Read the attributes and display them on the console.
         Console.WriteLine("Custom attribute contains: ");
         for(int index=0; index < myAttributesArray.Length; index++)
         {
            if(myAttributesArray[index] is MyAttribute2)
            {
               Console.WriteLine("myBoolValue: " +
                                       ((MyAttribute2)myAttributesArray[index]).myBoolValue);
            }
         }
      }
      catch(Exception e)
      {
         Console.WriteLine("The following exception is raised:" +e.Message);
      }
   }

   private static void CreateCallee(AppDomain domain)
   {
      AssemblyName myAssemblyName = new AssemblyName();
      // Create a name for the assembly.
      myAssemblyName.Name = "EmittedAssembly";

      // Create the dynamic assembly.
      AssemblyBuilder myAssemblyBuilder
                  = domain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run);

      Type myType = typeof(MyAttribute2);
      ConstructorInfo myInfo = myType.GetConstructor(new Type[]{typeof(bool)});

      // Create a dynamic module.
      ModuleBuilder myModuleBuilder = myAssemblyBuilder.DefineDynamicModule("EmittedModule");

      // Create a dynamic Enum.
      myEnumBuilder =
         myModuleBuilder.DefineEnum("MyNamespace.MyEnum", TypeAttributes.Public, typeof(Int32));

      FieldBuilder myFieldBuilder1 = myEnumBuilder.DefineLiteral("FieldOne", 1);
      FieldBuilder myFieldBuilder2 = myEnumBuilder.DefineLiteral("FieldTwo", 2);

      myEnumBuilder.CreateType();
      myEnumBuilder.SetCustomAttribute(myInfo, new byte[]{01,00,01});
   }
}

Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

<AttributeUsage(AttributeTargets.All, AllowMultiple := False)>  _
Public Class MyAttribute
   Inherits Attribute
   Public myBoolValue As Boolean
   
   Public Sub New(myBool As Boolean)
      Me.myBoolValue = myBool
   End Sub
End Class

Class MyApplication
   Private Shared myEnumBuilder As EnumBuilder
   
   Public Shared Sub Main()
      Try
         CreateCallee(Thread.GetDomain())
         Dim myAttributesArray As Object() = myEnumBuilder.GetCustomAttributes(True)
         
         ' Read the attributes and display them on the console.
         Console.WriteLine("Custom attribute contains: ")
         Dim index As Integer
         For index = 0 To myAttributesArray.Length - 1
            If TypeOf myAttributesArray(index) Is MyAttribute Then
               Console.WriteLine("myBoolValue: " + CType(myAttributesArray(index), MyAttribute). _
                                                                           myBoolValue.ToString())
            End If
         Next index
      Catch e As Exception
         Console.WriteLine("The following exception is raised:" + e.Message)
      End Try
   End Sub
   
   Private Shared Sub CreateCallee(domain As AppDomain)
      Dim myAssemblyName As New AssemblyName()
      ' Create a name for the assembly.
      myAssemblyName.Name = "EmittedAssembly"
      
      ' Create the dynamic assembly.
      Dim myAssemblyBuilder As AssemblyBuilder = domain.DefineDynamicAssembly(myAssemblyName, _
                                                                  AssemblyBuilderAccess.Run)
      
      Dim myType As Type = GetType(MyAttribute)
      Dim myInfo As ConstructorInfo = myType.GetConstructor(New Type() {GetType(Boolean)})
      
      ' Create a dynamic module.
      Dim myModuleBuilder As ModuleBuilder = myAssemblyBuilder.DefineDynamicModule("EmittedModule")
      
      ' Create a dynamic Enum.
      myEnumBuilder = myModuleBuilder.DefineEnum("MyNamespace.MyEnum", TypeAttributes.Public, _
                                                                              GetType(Int32))
      
      Dim myFieldBuilder1 As FieldBuilder = myEnumBuilder.DefineLiteral("FieldOne", 1)
      Dim myFieldBuilder2 As FieldBuilder = myEnumBuilder.DefineLiteral("FieldTwo", 2)
      
      myEnumBuilder.CreateType()
      myEnumBuilder.SetCustomAttribute(myInfo, New Byte() {1, 0, 1})
   End Sub
End Class

Gilt für:

GetCustomAttributes(Type, Boolean)

Quelle:: EnumBuilder.cs

Gibt die benutzerdefinierten Attribute zurück, die durch den angegebenen Typ identifiziert werden.

public:
 override cli::array <System::Object ^> ^ GetCustomAttributes(Type ^ attributeType, bool inherit);

public override object[] GetCustomAttributes (Type attributeType, bool inherit);

override this.GetCustomAttributes : Type * bool -> obj[]

Public Overrides Function GetCustomAttributes (attributeType As Type, inherit As Boolean) As Object()

Parameter

attributeType: Type

Das Type-Objekt, auf das die benutzerdefinierten Attribute angewendet werden.

inherit: Boolean

Gibt an, ob die Vererbungskette dieses Members nach den Attributen durchsucht werden soll.

Gibt zurück

Object[]

Gibt ein Objektarray zurück, das die Attribute dieses Konstruktors mit dem TypeattributeType darstellen.

Ausnahmen

NotSupportedException

Diese Methode wird derzeit nicht in Typen unterstützt, die nicht abgeschlossen sind.

Hinweise

Um die benutzerdefinierten Attribute eines fertigen Typs abzurufen, rufen Sie als Problemumgehung den Typ mithilfe von Type.GetType ab, und rufen Sie MemberInfo.GetCustomAttributes für den zurückgegebenen Typeauf.

Im folgenden Codebeispiel wird die Verwendung von GetCustomAttribute im Kontext von EnumBuilderveranschaulicht.


[AttributeUsage(AttributeTargets::All,AllowMultiple=false)]
public ref class MyAttribute: public Attribute
{
public:
   String^ myString;
   int myInteger;
   MyAttribute( String^ myString1, int myInteger1 )
   {
      this->myString = myString1;
      this->myInteger = myInteger1;
   }

};

ref class MyApplication
{
private:
   static AssemblyBuilder^ myAssemblyBuilder;
   static EnumBuilder^ myEnumBuilder;

public:
   static void Main()
   {
      try
      {
         CreateCallee( Thread::GetDomain() );
         if ( myEnumBuilder->IsDefined( MyAttribute::typeid, false ) )
         {
            array<Object^>^myAttributesArray = myEnumBuilder->GetCustomAttributes( MyAttribute::typeid, false );
            Console::WriteLine( "Custom attribute contains: " );

            // Read the attributes and display them on the console.
            for ( int index = 0; index < myAttributesArray->Length; index++ )
            {
               if ( dynamic_cast<MyAttribute^>(myAttributesArray[ index ]) )
               {
                  Console::WriteLine( "The value of myString  is: {0}", (dynamic_cast<MyAttribute^>(myAttributesArray[ index ]))->myString );
                  Console::WriteLine( "The value of myInteger is: {0}", (dynamic_cast<MyAttribute^>(myAttributesArray[ index ]))->myInteger );
               }
            }
         }
         else
         {
            Console::WriteLine( "Custom Attributes are not set for the EnumBuilder" );
         }
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "The following exception is raised:{0}", e->Message );
      }

   }

private:
   static void CreateCallee( AppDomain^ domain )
   {
      // Create a name for the assembly.
      AssemblyName^ myAssemblyName = gcnew AssemblyName;
      myAssemblyName->Name = "EmittedAssembly";

      // Create the dynamic assembly.
      myAssemblyBuilder = domain->DefineDynamicAssembly( myAssemblyName, AssemblyBuilderAccess::Run );
      Type^ myType = MyAttribute::typeid;
      array<Type^>^temp0 = {String::typeid,int::typeid};
      ConstructorInfo^ myInfo = myType->GetConstructor( temp0 );
      array<Object^>^temp1 = {"Hello",2};
      CustomAttributeBuilder^ myCustomAttributeBuilder = gcnew CustomAttributeBuilder( myInfo,temp1 );

      // Create a dynamic module.
      ModuleBuilder^ myModuleBuilder = myAssemblyBuilder->DefineDynamicModule( "EmittedModule" );

      // Create a dynamic Enum.
      myEnumBuilder = myModuleBuilder->DefineEnum( "MyNamespace.MyEnum", TypeAttributes::Public, Int32::typeid );
      FieldBuilder^ myFieldBuilder1 = myEnumBuilder->DefineLiteral( "FieldOne", 1 );
      FieldBuilder^ myFieldBuilder2 = myEnumBuilder->DefineLiteral( "FieldTwo", 2 );
      myEnumBuilder->CreateType();
      myEnumBuilder->SetCustomAttribute( myCustomAttributeBuilder );
   }
};

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

[AttributeUsage(AttributeTargets.All, AllowMultiple = false)]
public class MyAttribute : Attribute
{
   public String myString;
   public int myInteger;

   public MyAttribute(String myString1, int myInteger1)
   {
      this.myString = myString1;
      this.myInteger = myInteger1;
   }
}

class MyApplication
{
   static AssemblyBuilder myAssemblyBuilder;
   static EnumBuilder myEnumBuilder;

   public static void Main()
   {
      try
      {
         CreateCallee(Thread.GetDomain());
         if(myEnumBuilder.IsDefined(typeof(MyAttribute),false))
         {
            object[] myAttributesArray = myEnumBuilder.GetCustomAttributes(typeof(MyAttribute),false);
            Console.WriteLine("Custom attribute contains: ");
            // Read the attributes and display them on the console.
            for(int index=0; index < myAttributesArray.Length; index++)
            {
               if(myAttributesArray[index] is MyAttribute)
               {
                  Console.WriteLine("The value of myString  is: "
                                    + ((MyAttribute)myAttributesArray[index]).myString);
                  Console.WriteLine("The value of myInteger is: "
                                    + ((MyAttribute)myAttributesArray[index]).myInteger);
               }
            }
         }
         else
         {
            Console.WriteLine("Custom Attributes are not set for the EnumBuilder");
         }
      }
      catch(Exception e)
      {
         Console.WriteLine("The following exception is raised:" +e.Message);
      }
  }

   private static void CreateCallee(AppDomain domain)
   {
      // Create a name for the assembly.
      AssemblyName myAssemblyName = new AssemblyName();
      myAssemblyName.Name = "EmittedAssembly";

      // Create the dynamic assembly.
      myAssemblyBuilder = domain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run);

      Type myType = typeof(MyAttribute);
      ConstructorInfo myInfo = myType.GetConstructor(new Type[2]{typeof(String), typeof(int)});
      CustomAttributeBuilder myCustomAttributeBuilder =
                                    new CustomAttributeBuilder(myInfo, new object[2]{"Hello", 2});

      // Create a dynamic module.
      ModuleBuilder myModuleBuilder = myAssemblyBuilder.DefineDynamicModule("EmittedModule");

      // Create a dynamic Enum.
      myEnumBuilder = myModuleBuilder.DefineEnum("MyNamespace.MyEnum", TypeAttributes.Public, typeof(Int32));

      FieldBuilder myFieldBuilder1 = myEnumBuilder.DefineLiteral("FieldOne", 1);
      FieldBuilder myFieldBuilder2 = myEnumBuilder.DefineLiteral("FieldTwo", 2);

      myEnumBuilder.CreateType();
      myEnumBuilder.SetCustomAttribute(myCustomAttributeBuilder);
   }
}

<AttributeUsage(AttributeTargets.All, AllowMultiple := False)>  _
Public Class MyAttribute
   Inherits Attribute
   Public myString As String
   Public myInteger As Integer

   Public Sub New(myString1 As String, myInteger1 As Integer)
      Me.myString = myString1
      Me.myInteger = myInteger1
   End Sub
End Class

Class MyApplication
   Private Shared myAssemblyBuilder As AssemblyBuilder
   Private Shared myEnumBuilder As EnumBuilder

   Public Shared Sub Main()
      Try
         CreateCallee(Thread.GetDomain())
         If myEnumBuilder.IsDefined(GetType(MyAttribute), False) Then
            Dim myAttributesArray As Object() = myEnumBuilder.GetCustomAttributes _
                                                      (GetType(MyAttribute), False)
            Console.WriteLine("Custom attribute contains: ")
            ' Read the attributes and display them on the console.
            Dim index As Integer
            For index = 0 To myAttributesArray.Length - 1
               If TypeOf myAttributesArray(index) Is MyAttribute Then
                  Console.WriteLine("The value of myString  is: " + CType(myAttributesArray(index), _
                                                                           MyAttribute).myString)
                  Console.WriteLine("The value of myInteger is: " + CType(myAttributesArray(index), _
                                                               MyAttribute).myInteger.ToString())
               End If
            Next index
         Else
            Console.WriteLine("Custom Attributes are not set for the EnumBuilder")
         End If
      Catch e As Exception
         Console.WriteLine("The following exception is raised:" + e.Message)
      End Try
   End Sub

   Private Shared Sub CreateCallee(domain As AppDomain)
      ' Create a name for the assembly.
      Dim myAssemblyName As New AssemblyName()
      myAssemblyName.Name = "EmittedAssembly"

      ' Create the dynamic assembly.
      myAssemblyBuilder = domain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run)

      Dim myType As Type = GetType(MyAttribute)
      Dim myInfo As ConstructorInfo = myType.GetConstructor(New Type(1) {GetType(String), _
                                                                           GetType(Integer)})
      Dim myCustomAttributeBuilder As New CustomAttributeBuilder(myInfo, New Object(1) {"Hello", 2})

      ' Create a dynamic module.
      Dim myModuleBuilder As ModuleBuilder = myAssemblyBuilder.DefineDynamicModule("EmittedModule")

      ' Create a dynamic Enum.
      myEnumBuilder = myModuleBuilder.DefineEnum("MyNamespace.MyEnum", TypeAttributes.Public, _
                                                                                 GetType(Int32))

      Dim myFieldBuilder1 As FieldBuilder = myEnumBuilder.DefineLiteral("FieldOne", 1)
      Dim myFieldBuilder2 As FieldBuilder = myEnumBuilder.DefineLiteral("FieldTwo", 2)

      myEnumBuilder.CreateType()
      myEnumBuilder.SetCustomAttribute(myCustomAttributeBuilder)
   End Sub
End Class

Gilt für:

Freigeben über

EnumBuilder.GetCustomAttributes Methode

Definition

Überlädt

GetCustomAttributes(Boolean)

Parameter

Gibt zurück

Ausnahmen

Hinweise

Gilt für:

GetCustomAttributes(Type, Boolean)

Parameter

Gibt zurück

Ausnahmen

Hinweise

Gilt für:

Zusätzliche Ressourcen