Page.RaisePostBackEvent(IPostBackEventHandler, String) Method


Notifies the server control that caused the postback that it should handle an incoming postback event.

 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)



The ASP.NET server control that caused the postback. This control must implement the IPostBackEventHandler interface.


The postback argument.


The following example uses the RaisePostBackEvent method to notify ASP.NET that a post-back event is raised when a custom userButton server control is clicked.

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.
    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
  End Sub


The Page object calls the RaisePostBackEvent method when a postback occurs. This call occurs in the page life cycle after loading and change notification are complete but before prerendering occurs.

Applies to

See also