CodeDelegateCreateExpression Classe

Definição

public ref class CodeDelegateCreateExpression : System::CodeDom::CodeExpression

public class CodeDelegateCreateExpression : System.CodeDom.CodeExpression

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class CodeDelegateCreateExpression : System.CodeDom.CodeExpression

type CodeDelegateCreateExpression = class
    inherit CodeExpression

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDispatch)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type CodeDelegateCreateExpression = class
    inherit CodeExpression

Public Class CodeDelegateCreateExpression
Inherits CodeExpression

Herança

Object

CodeObject

CodeExpression

CodeDelegateCreateExpression

Atributos

ClassInterfaceAttribute ComVisibleAttribute SerializableAttribute

Exemplos

O código de exemplo a seguir usa um CodeDelegateCreateExpression para criar um delegado.

// Defines a delegate creation expression that creates an EventHandler delegate pointing to a method named TestMethod.
CodeDelegateCreateExpression^ createDelegate1 = gcnew CodeDelegateCreateExpression( gcnew CodeTypeReference( "System.EventHandler" ),gcnew CodeThisReferenceExpression,"TestMethod" );

// Attaches an EventHandler delegate pointing to TestMethod to the TestEvent event.
CodeAttachEventStatement^ attachStatement1 = gcnew CodeAttachEventStatement( gcnew CodeThisReferenceExpression,"TestEvent",createDelegate1 );

// A C# code generator produces the following source code for the preceeding example code:
//     this.TestEvent += new System.EventHandler(this.TestMethod);

// 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);

' Defines a delegate creation expression that creates an EventHandler delegate pointing to TestMethod.
Dim createDelegate1 As New CodeDelegateCreateExpression(New CodeTypeReference("System.EventHandler"), New CodeThisReferenceExpression(), "TestMethod")

' Attaches an EventHandler delegate pointing to TestMethod to the TestEvent event.
Dim attachStatement1 As New CodeAttachEventStatement(New CodeThisReferenceExpression(), "TestEvent", createDelegate1)

' A Visual Basic code generator produces the following source code for the preceeding example code:

'     AddHandler TestEvent, AddressOf Me.TestMethod

Comentários

CodeDelegateCreateExpression representa o código que cria um delegado. CodeDelegateCreateExpression geralmente é usado com CodeAttachEventStatement ou CodeRemoveEventStatement para representar um manipulador de eventos para anexar ou remover de um evento.

A DelegateType propriedade especifica o tipo de delegado a ser criado. A TargetObject propriedade indica o objeto que contém o método manipulador de eventos. A MethodName propriedade indica o nome do método manipulador de eventos cuja assinatura de método corresponde à assinatura do método do delegado.

Em C#, uma expressão de criação de delegado normalmente é da seguinte forma: new EventHandler(this.HandleEventMethod). No Visual Basic, uma expressão de criação de delegado normalmente é da seguinte forma: AddressOf Me.HandleEventMethod.

Construtores

Propriedades

Métodos

Aplica-se a