Page.RegisterRequiresRaiseEvent(IPostBackEventHandler) Page.RegisterRequiresRaiseEvent(IPostBackEventHandler) Page.RegisterRequiresRaiseEvent(IPostBackEventHandler) Page.RegisterRequiresRaiseEvent(IPostBackEventHandler) Method

定義

將 ASP.NET 伺服器控制項註冊為,在 Page 物件上處理控制項時,要求引發事件的控制項。Registers an ASP.NET server control as one requiring an event to be raised when the control is processed on the Page object.

public:
 virtual void RegisterRequiresRaiseEvent(System::Web::UI::IPostBackEventHandler ^ control);
public virtual void RegisterRequiresRaiseEvent (System.Web.UI.IPostBackEventHandler control);
abstract member RegisterRequiresRaiseEvent : System.Web.UI.IPostBackEventHandler -> unit
override this.RegisterRequiresRaiseEvent : System.Web.UI.IPostBackEventHandler -> unit
Public Overridable Sub RegisterRequiresRaiseEvent (control As IPostBackEventHandler)

參數

control
IPostBackEventHandler IPostBackEventHandler IPostBackEventHandler IPostBackEventHandler

要登錄的控制項。The control to register.

範例

下列程式碼範例會使用RegisterRequiresRaiseEvent方法來Button註冊 Web 服務器控制項,以要求引發事件。The following code example uses the RegisterRequiresRaiseEvent method to register a Button Web server control as requiring an event to be raised. 註冊第一個Button控制項之後,您可以讓程式碼中宣告Button的第二個控制項將第一個按鈕的 click 事件結果張貼至頁面。After you have registered the first Button control, you can cause the second Button control declared in the code to post the results of the first button's click event to the page.

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

備註

每個頁面要求只能註冊一個伺服器控制項。Only one server control can be registered per page request. RegisterRequiresRaiseEvent控制項未在 post 資料格式中包含控制項識別碼時,必須使用。The RegisterRequiresRaiseEvent must be used when the control does not include its control ID in the form post data. 此外,已註冊的控制項必須執行IPostBackEventHandler介面。Also, the control that is registered must implement the IPostBackEventHandler interface.

適用於

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