Page.RaisePostBackEvent(IPostBackEventHandler, String) 方法

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

通知引起回发的服务器控件：它应处理传入的回发事件。

protected:
 virtual void RaisePostBackEvent(System::Web::UI::IPostBackEventHandler ^ sourceControl, System::String ^ eventArgument);

protected virtual void RaisePostBackEvent (System.Web.UI.IPostBackEventHandler sourceControl, string eventArgument);

abstract member RaisePostBackEvent : System.Web.UI.IPostBackEventHandler * string -> unit
override this.RaisePostBackEvent : System.Web.UI.IPostBackEventHandler * string -> unit

Protected Overridable Sub RaisePostBackEvent (sourceControl As IPostBackEventHandler, eventArgument As String)

参数

sourceControl

IPostBackEventHandler

引起回发的 ASP.NET 服务器控件。 该控件必须实现 IPostBackEventHandler 接口。

eventArgument

String

回发参数。

示例

以下示例使用此方法RaisePostBackEvent通知 ASP.NET 单击自定义userButton服务器控件时引发帖子后事件。

void DisplayUserName(Object sender, EventArgs ea) 
{
   Response.Write("Welcome to " + Server.HtmlEncode(userName.Text));
}
void RaiseEvent(Object sender, EventArgs ea)
{
   // Raise a post back event for a control.
   this.RaisePostBackEvent(userButton, "");
}
void Page_Load(Object sender, EventArgs ea)
{
   // Register a control as one that requires postback handling.
   this.RegisterRequiresRaiseEvent(userButton);
}

    Sub DisplayUserName(Sender As Object, e As EventArgs) 
       Response.Write("Welcome to " + Server.HtmlEncode(userName.Text))
    End Sub

   Sub MyRaiseEvent(Sender As Object, e As EventArgs)
       'Raises a post back event for a control.
        Me.RaisePostBackEvent(userButton, "")
   End Sub 
    
    Sub Page_Load(Sender As Object, e As EventArgs)

      'Registers a control as one that requires postback handling
      Me.RegisterRequiresRaiseEvent(userButton)
  End Sub

注解

当发生回发时，对象 Page 将调用 RaisePostBackEvent 该方法。 加载和更改通知完成后，此调用在页面生命周期中发生，但在预呈现之前发生。

另请参阅

• IPostBackEventHandler
• ASP.NET 页生命周期简介
• ASP.NET 服务器控制事件模型