CodeRemoveEventStatement Classe

Definição

public ref class CodeRemoveEventStatement : System::CodeDom::CodeStatement

public class CodeRemoveEventStatement : System.CodeDom.CodeStatement

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

type CodeRemoveEventStatement = class
    inherit CodeStatement

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

Public Class CodeRemoveEventStatement
Inherits CodeStatement

Herança

Object

CodeObject

CodeStatement

CodeRemoveEventStatement

Atributos

ClassInterfaceAttribute ComVisibleAttribute SerializableAttribute

Exemplos

O exemplo a seguir demonstra o uso de um CodeRemoveEventStatement para remover um delegado de um evento.

// Creates a delegate of type System.EventHandler pointing to a method named OnMouseEnter.
CodeDelegateCreateExpression mouseEnterDelegate = new CodeDelegateCreateExpression( new CodeTypeReference("System.EventHandler"), new CodeThisReferenceExpression(), "OnMouseEnter" );
// Creates a remove event statement that removes the delegate from the TestEvent event.
CodeRemoveEventStatement removeEvent1 = new CodeRemoveEventStatement( new CodeThisReferenceExpression(), "TestEvent", mouseEnterDelegate );

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

//     this.TestEvent -= new System.EventHandler(this.OnMouseEnter);

' Creates a delegate of type System.EventHandler pointing to a method named OnMouseEnter.
Dim mouseEnterDelegate As New CodeDelegateCreateExpression(New CodeTypeReference("System.EventHandler"), New CodeThisReferenceExpression(), "OnMouseEnter")
' Creates a remove event statement that removes the delegate from the TestEvent event.
Dim removeEvent1 As New CodeRemoveEventStatement(New CodeThisReferenceExpression(), "TestEvent", mouseEnterDelegate)

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

'   RemoveHandler TestEvent, AddressOf Me.OnMouseEnter

Comentários

CodeRemoveEventStatement pode ser usado para representar uma instrução que remove um manipulador de eventos para um evento.

A Event propriedade especifica o evento do qual remover o manipulador de eventos. A Listener propriedade especifica o manipulador de eventos a ser removido.