定义 ASP.NET 服务器控件为处理回发事件而必须实现的方法。
下面的代码示例定义一个自定义按钮服务器控件,该控件可引起回发,使用 RaisePostBackEvent 方法捕获回发,并在服务器上引发 Click 事件。(摘自MSDN)
Imports System
Imports System.Web.UI
Imports System.Collections
Imports System.Collections.Specialized
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Namespace CustomControls
Public Class MyButton
Inherits Control
Implements IPostBackEventHandler
' Define the Click event.
Public Event Click As EventHandler
' Invoke delegates registered with the Click event.
Protected Overridable Sub OnClick(e As EventArgs)
RaiseEvent Click(Me, e)
End Sub
' Define the method of IPostBackEventHandler that raises change events.
Public Sub RaisePostBackEvent(eventArgument As String) _
Implements IPostBackEventHandler.RaisePostBackEvent
OnClick(New EventArgs())
End Sub
Protected Overrides Sub Render(output As HtmlTextWriter)
output.Write("<INPUT TYPE = submit name = " & Me.UniqueID & _
" Value = 'Click Me' />")
End Sub
End Class
End Namespace
keyword: IPostBackEventHandler ,RaisePostBackEvent,控件回发
下面的代码示例定义一个自定义按钮服务器控件,该控件可引起回发,使用 RaisePostBackEvent 方法捕获回发,并在服务器上引发 Click 事件。(摘自MSDN)
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keyword: IPostBackEventHandler ,RaisePostBackEvent,控件回发