CodeDelegateCreateExpression Class

Definition

Namespace:

System.CodeDom

Assembly:

System.CodeDom.dll

Source:

CodeDelegateCreateExpression.cs

Represents an expression that creates a delegate.

C#

public class CodeDelegateCreateExpression : System.CodeDom.CodeExpression

Inheritance

Object

CodeObject

CodeExpression

CodeDelegateCreateExpression

Examples

The following example code uses a CodeDelegateCreateExpression to create a delegate.

C#

// Defines a delegate creation expression that creates an EventHandler delegate pointing to a method named TestMethod.
CodeDelegateCreateExpression createDelegate1 = new CodeDelegateCreateExpression(
new CodeTypeReference( "System.EventHandler" ), new CodeThisReferenceExpression(), "TestMethod" );
// Attaches an EventHandler delegate pointing to TestMethod to the TestEvent event.
CodeAttachEventStatement attachStatement1 = new CodeAttachEventStatement( new CodeThisReferenceExpression(), "TestEvent", createDelegate1 );

// A C# code generator produces the following source code for the preceeding example code:

//     this.TestEvent += new System.EventHandler(this.TestMethod);

Remarks

CodeDelegateCreateExpression represents code that creates a delegate. CodeDelegateCreateExpression is often used with CodeAttachEventStatement or CodeRemoveEventStatement to represent an event handler to attach or remove from an event.

The DelegateType property specifies the type of delegate to create. The TargetObject property indicates the object that contains the event-handler method. The MethodName property indicates the name of the event-handler method whose method signature matches the method signature of the delegate.

In C#, a delegate creation expression is typically of the following form: new EventHandler(this.HandleEventMethod). In Visual Basic, a delegate creation expression is typically of the following form: AddressOf Me.HandleEventMethod.

Constructors

CodeDelegateCreateExpression()	Initializes a new instance of the CodeDelegateCreateExpression class.
CodeDelegateCreateExpression(CodeTypeReference, CodeExpression, String)	Initializes a new instance of the CodeDelegateCreateExpression class.

Properties

DelegateType	Gets or sets the data type of the delegate.
MethodName	Gets or sets the name of the event handler method.
TargetObject	Gets or sets the object that contains the event-handler method.
UserData	Gets the user-definable data for the current object. (Inherited from CodeObject)

Applies to