AssemblyBuilder.SetCustomAttribute Method

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

public:
 void SetCustomAttribute(System::Reflection::Emit::CustomAttributeBuilder ^ customBuilder);

public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);

member this.SetCustomAttribute : System.Reflection.Emit.CustomAttributeBuilder -> unit

Public Sub SetCustomAttribute (customBuilder As CustomAttributeBuilder)

Parameters

Exceptions

Examples

The following code sample illustrates the use of SetCustomAttribute within AssemblyBuilder, using a CustomAttributeBuilder.

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

 public MyAttribute(String s, int x)
 {
 this.s = s;
 this.x = x;
 }
}

class MyApplication
{
 public static void Main()
 {
 Type customAttribute = CreateCallee(Thread.GetDomain());
 object[] attributes = customAttribute.Assembly.GetCustomAttributes(true);
 Console.WriteLine("MyAttribute custom attribute contains : ");
 for(int index=0; index < attributes.Length; index++)
 {
 if(attributes[index] is MyAttribute)
 {
 Console.WriteLine("s : " + ((MyAttribute)attributes[index]).s);
 Console.WriteLine("x : " + ((MyAttribute)attributes[index]).x);
 break;
 }
 }
 }

 private static Type CreateCallee(AppDomain domain)
 {
 AssemblyName myAssemblyName = new AssemblyName();
 myAssemblyName.Name = "EmittedAssembly";
 AssemblyBuilder myAssembly = domain.DefineDynamicAssembly(myAssemblyName,
 AssemblyBuilderAccess.Run);
 Type myType = typeof(MyAttribute);
 ConstructorInfo infoConstructor = myType.GetConstructor(new Type[2]{typeof(String), typeof(int)});
 CustomAttributeBuilder attributeBuilder =
 new CustomAttributeBuilder(infoConstructor, new object[2]{"Hello", 2});
 myAssembly.SetCustomAttribute(attributeBuilder);
 ModuleBuilder myModule = myAssembly.DefineDynamicModule("EmittedModule");
 // Define a public class named "HelloWorld" in the assembly.
 TypeBuilder helloWorldClass = myModule.DefineType("HelloWorld", TypeAttributes.Public);

 return(helloWorldClass.CreateType());
 }
}

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

 Public Sub New(s As String, x As Integer)
 Me.s = s
 Me.x = x
 End Sub
End Class

Class MyApplication
 Public Shared Sub Main()
 Dim customAttribute As Type = CreateCallee(Thread.GetDomain())
 Dim attributes As Object() = customAttribute.Assembly.GetCustomAttributes(True)
 Console.WriteLine("MyAttribute custom attribute contains : ")
 Dim index As Integer
 For index = 0 To attributes.Length - 1
 If TypeOf attributes(index) Is MyAttribute Then
 Console.WriteLine("s : " + CType(attributes(index), MyAttribute).s)
 Console.WriteLine("x : " + CType(attributes(index), MyAttribute).x.ToString())
 Exit For
 End If
 Next index
 End Sub

 Private Shared Function CreateCallee(domain As AppDomain) As Type
 Dim myAssemblyName As New AssemblyName()
 myAssemblyName.Name = "EmittedAssembly"
 Dim myAssembly As AssemblyBuilder = _
 domain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.Run)
 Dim myType As Type = GetType(MyAttribute)
 Dim infoConstructor As ConstructorInfo = _
 myType.GetConstructor(New Type(1) {GetType(String), GetType(Integer)})
 Dim attributeBuilder As New CustomAttributeBuilder(infoConstructor, New Object(1) {"Hello", 2})
 myAssembly.SetCustomAttribute(attributeBuilder)
 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)
 Return helloWorldClass.CreateType()
 End Function 'CreateCallee
End Class

Remarks

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

Source:

AssemblyBuilder.cs

public:
 void SetCustomAttribute(System::Reflection::ConstructorInfo ^ con, cli::array <System::Byte> ^ binaryAttribute);

public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);

[System.Runtime.InteropServices.ComVisible(true)]
public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);

member this.SetCustomAttribute : System.Reflection.ConstructorInfo * byte[] -> unit

[<System.Runtime.InteropServices.ComVisible(true)>]
member this.SetCustomAttribute : System.Reflection.ConstructorInfo * byte[] -> unit

Public Sub SetCustomAttribute (con As ConstructorInfo, binaryAttribute As Byte())

Parameters

Attributes

ComVisibleAttribute

Exceptions

Examples

The following code sample illustrates the use of SetCustomAttribute to attach a custom attribute to a dynamically generated assembly.

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

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

 public MyAttribute(bool s)
 {
 this.s = s;
 }
}

class MyApplication
{
 public static void Main()
 {
 Type customAttribute = CreateCallee(Thread.GetDomain());
 object[] attributes = customAttribute.Assembly.GetCustomAttributes(true);
 Console.WriteLine("MyAttribute custom attribute contains : ");
 for(int index=0; index < attributes.Length; index++)
 {
 if(attributes[index] is MyAttribute)
 {
 Console.WriteLine("s : " + ((MyAttribute)attributes[index]).s);
 break;
 }
 }
 }

 private static Type CreateCallee(AppDomain domain)
 {
 AssemblyName myAssemblyName = new AssemblyName();
 myAssemblyName.Name = "EmittedAssembly";
 AssemblyBuilder myAssembly = domain.DefineDynamicAssembly(myAssemblyName,
 AssemblyBuilderAccess.Run);
 Type myType = typeof(MyAttribute);
 ConstructorInfo infoConstructor = myType.GetConstructor(new Type[]{typeof(bool)});
 myAssembly.SetCustomAttribute(infoConstructor, new byte[]{01,00,01});
 ModuleBuilder myModule = myAssembly.DefineDynamicModule("EmittedModule");
 // Define a public class named "HelloWorld" in the assembly.
 TypeBuilder helloWorldClass = myModule.DefineType("HelloWorld", TypeAttributes.Public);

 return(helloWorldClass.CreateType());
 }
}

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


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

Class MyApplication
 
 Public Shared Sub Main()
 Dim customAttribute As Type = CreateCallee(Thread.GetDomain())
 Dim attributes As Object() = customAttribute.Assembly.GetCustomAttributes(True)
 Console.WriteLine("MyAttribute custom attribute contains : ")
 Dim index As Integer
 For index = 0 To attributes.Length - 1
 If TypeOf attributes(index) Is MyAttribute Then
 Console.WriteLine("s : " + CType(attributes(index), MyAttribute).s.ToString())
 Exit For
 End If
 Next index
 End Sub
 
 Private Shared Function CreateCallee(domain As AppDomain) As Type
 Dim myAssemblyName As New AssemblyName()
 myAssemblyName.Name = "EmittedAssembly"
 Dim myAssembly As AssemblyBuilder = domain.DefineDynamicAssembly(myAssemblyName, _
 AssemblyBuilderAccess.Run)
 Dim myType As Type = GetType(MyAttribute)
 Dim infoConstructor As ConstructorInfo = myType.GetConstructor(New Type() {GetType(Boolean)})
 myAssembly.SetCustomAttribute(infoConstructor, New Byte() {01, 00, 01})
 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)
 
 Return helloWorldClass.CreateType()
 End Function 'CreateCallee
End Class

Remarks

For information on how to format binaryAttribute, see the metadata specification in Partition II of the Common Language Infrastructure (CLI) specification.

RuntimeConstructorInfo is a special type generated by the system. It derives from the ConstructorInfo class, and any ConstructorInfo object you obtain through reflection is actually an instance of RuntimeConstructorInfo.