EventAttributes Enum

Definition

Namespace:

System.Reflection

Assembly:

System.Runtime.dll

Specifies the attributes of an event.

This enumeration supports a bitwise combination of its member values.

public enum class EventAttributes

[System.Flags]
public enum EventAttributes

[<System.Flags>]
type EventAttributes = 

Public Enum EventAttributes

Inheritance

Object

ValueType

Enum

EventAttributes

Attributes

FlagsAttribute

Fields

Name	Value	Description
None	0	Specifies that the event has no attributes.
SpecialName	512	Specifies that the event is special in a way described by the name.
ReservedMask	1024	Specifies a reserved flag for common language runtime use only.
RTSpecialName	1024	Specifies that the common language runtime should check name encoding.

Examples

The following example uses reflection emit to create a type with two events. It uses None to specify that the events have no attributes.

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

ref class MyApplication
{
private:
   delegate void MyEvent( Object^ temp );

public:

   // Create the callee transient dynamic assembly.
   static TypeBuilder^ CreateCallee( AppDomain^ myDomain )
   {
      AssemblyName^ assemblyName = gcnew AssemblyName;
      assemblyName->Name = "EmittedAssembly";
      
      // Create the callee dynamic assembly.
      AssemblyBuilder^ myAssembly = myDomain->DefineDynamicAssembly( assemblyName, AssemblyBuilderAccess::Run );
      
      // Create a dynamic module
      ModuleBuilder^ myModule = myAssembly->DefineDynamicModule( "EmittedModule" );
      
      // Define a public class named "HelloWorld" in the assembly.
      TypeBuilder^ helloWorldClass = myModule->DefineType( "HelloWorld", TypeAttributes::Public );
      array<Type^>^typeArray = gcnew array<Type^>(1);
      typeArray[ 0 ] = Object::typeid;
      MethodBuilder^ myMethod1 = helloWorldClass->DefineMethod( "OnClick", MethodAttributes::Public, void::typeid, typeArray );
      ILGenerator^ methodIL1 = myMethod1->GetILGenerator();
      methodIL1->Emit( OpCodes::Ret );
      MethodBuilder^ myMethod2 = helloWorldClass->DefineMethod( "OnMouseUp", MethodAttributes::Public, void::typeid, typeArray );
      ILGenerator^ methodIL2 = myMethod2->GetILGenerator();
      methodIL2->Emit( OpCodes::Ret );
      
      // Create the events.
      EventBuilder^ myEvent1 = helloWorldClass->DefineEvent( "Click", EventAttributes::None, MyEvent::typeid );
      myEvent1->SetRaiseMethod( myMethod1 );
      EventBuilder^ myEvent2 = helloWorldClass->DefineEvent( "MouseUp", EventAttributes::None, MyEvent::typeid );
      myEvent2->SetRaiseMethod( myMethod2 );
      helloWorldClass->CreateType();
      return (helloWorldClass);
   }
};

int main()
{
   TypeBuilder^ helloWorldClass = MyApplication::CreateCallee( Thread::GetDomain() );
   array<EventInfo^>^info = helloWorldClass->GetEvents( static_cast<BindingFlags>(BindingFlags::Public | BindingFlags::Instance) );
   Console::WriteLine( "'HelloWorld' type has following events :" );
   for ( int i = 0; i < info->Length; i++ )
      Console::WriteLine( info[ i ]->Name );
   return 0;
}

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

public class MyApplication
{
   public delegate void MyEvent(Object temp);
   public static void Main()
   {
      TypeBuilder helloWorldClass = CreateCallee(Thread.GetDomain());

      EventInfo[] info =
         helloWorldClass.GetEvents(BindingFlags.Public | BindingFlags.Instance);
      Console.WriteLine("'HelloWorld' type has following events :");
      for(int i=0; i < info.Length; i++)
         Console.WriteLine(info[i].Name);
   }

   // Create the callee transient dynamic assembly.
   private static TypeBuilder CreateCallee(AppDomain myDomain)
   {
      AssemblyName assemblyName = new AssemblyName();
      assemblyName.Name = "EmittedAssembly";

      // Create the callee dynamic assembly.
      AssemblyBuilder myAssembly =
         myDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
      // Create a dynamic module named "CalleeModule" in the callee.
      ModuleBuilder myModule = myAssembly.DefineDynamicModule("EmittedModule");

      // Define a public class named "HelloWorld" in the assembly.
      TypeBuilder helloWorldClass =
         myModule.DefineType("HelloWorld", TypeAttributes.Public);

      MethodBuilder myMethod1 = helloWorldClass.DefineMethod("OnClick",
         MethodAttributes.Public, typeof(void), new Type[]{typeof(Object)});
      ILGenerator methodIL1 = myMethod1.GetILGenerator();
      methodIL1.Emit(OpCodes.Ret);
      MethodBuilder myMethod2 = helloWorldClass.DefineMethod("OnMouseUp",
         MethodAttributes.Public, typeof(void), new Type[]{typeof(Object)});
      ILGenerator methodIL2 = myMethod2.GetILGenerator();
      methodIL2.Emit(OpCodes.Ret);

      // Create the events.
      EventBuilder myEvent1 = helloWorldClass.DefineEvent("Click", EventAttributes.None,
         typeof(MyEvent));
      myEvent1.SetRaiseMethod(myMethod1);
      EventBuilder myEvent2 = helloWorldClass.DefineEvent("MouseUp", EventAttributes.None,
         typeof(MyEvent));
      myEvent2.SetRaiseMethod(myMethod2);

      helloWorldClass.CreateType();
      return(helloWorldClass);
   }
}

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

Public Class MyApplication

   Delegate Sub MyEvent(temp As Object)

   Public Shared Sub Main()
      Dim helloWorldClass As TypeBuilder = CreateCallee(Thread.GetDomain())

      Dim info As EventInfo() = helloWorldClass.GetEvents(BindingFlags.Public Or _
                                                          BindingFlags.Instance)
      Console.WriteLine("'HelloWorld' type has following events :")
      Dim i As Integer
      For i = 0 To info.Length - 1
         Console.WriteLine(info(i).Name)
      Next i
   End Sub

   ' Create the callee transient dynamic assembly.
   Private Shared Function CreateCallee(myDomain As AppDomain) As TypeBuilder
      Dim myAssemblyName As New AssemblyName()
      myAssemblyName.Name = "EmittedAssembly"

      ' Create the callee dynamic assembly.
      Dim myAssembly As AssemblyBuilder = myDomain.DefineDynamicAssembly _
                                          (myAssemblyName, AssemblyBuilderAccess.Run)
      ' Create a dynamic module named "CalleeModule" in the callee
      Dim myModule As ModuleBuilder = myAssembly.DefineDynamicModule("EmittedModule")

      ' Define a public class named "HelloWorld" in the assembly.
      Dim helloWorldClass As TypeBuilder = myModule.DefineType _
                                           ("HelloWorld", TypeAttributes.Public)

      Dim myMethod1 As MethodBuilder = helloWorldClass.DefineMethod _
                    ("OnClick", MethodAttributes.Public, Nothing, New Type() {GetType(Object)})
      Dim methodIL1 As ILGenerator = myMethod1.GetILGenerator()
      methodIL1.Emit(OpCodes.Ret)
      Dim myMethod2 As MethodBuilder = helloWorldClass.DefineMethod _
                   ("OnMouseUp", MethodAttributes.Public, Nothing, New Type() {GetType(Object)})
      Dim methodIL2 As ILGenerator = myMethod2.GetILGenerator()
      methodIL2.Emit(OpCodes.Ret)

      ' Create the events.
      Dim myEvent1 As EventBuilder = helloWorldClass.DefineEvent _
                                         ("Click", EventAttributes.None, GetType(MyEvent))
      myEvent1.SetRaiseMethod(myMethod1)
      Dim myEvent2 As EventBuilder = helloWorldClass.DefineEvent _
                                         ("MouseUp", EventAttributes.None, GetType(MyEvent))
      myEvent2.SetRaiseMethod(myMethod2)

      helloWorldClass.CreateType()
      Return helloWorldClass
   End Function 'CreateCallee
End Class

Remarks

EventAttributes values may be combined using the bitwise OR operation to get the appropriate combination.

These enums are defined in the corhdr.h file and are a combination of bits and enumerators.