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EnumBuilder.SetCustomAttribute Method (CustomAttributeBuilder)

Sets a custom attribute using a custom attribute builder.

Namespace:  System.Reflection.Emit
Assembly:  mscorlib (in mscorlib.dll)

public void SetCustomAttribute(
	CustomAttributeBuilder customBuilder
)

Parameters

customBuilder
Type: System.Reflection.Emit.CustomAttributeBuilder
An instance of a helper class to define the custom attribute.

ExceptionCondition
ArgumentNullException

con is null.

The following code sample illustrates the use of SetCustomAttribute in the context of EnumBuilder, passing a CustomAttributeBuilder.


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


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

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

class MyApplication
{
   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 MyAttribute)
            {
               Console.WriteLine("myBoolValue: " + 
                                       ((MyAttribute)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(MyAttribute);
      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});

   }
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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