Control.OnBubbleEvent Method

Determines whether the event for the server control is passed up the page's UI server control hierarchy.

Namespace: System.Web.UI
Assembly: System.Web (in system.web.dll)

virtual bool OnBubbleEvent (
	Object^ source, 
	EventArgs^ args
protected boolean OnBubbleEvent (
	Object source, 
	EventArgs args
protected function OnBubbleEvent (
	source : Object, 
	args : EventArgs
) : boolean
Not applicable.



The source of the event.


An EventArgs object that contains the event data.

Return Value

true if the event has been canceled; otherwise, false. The default is false.

ASP.NET server controls such as the Repeater, DataList and GridView Web controls can contain child controls that raise events. For example, each row in a GridView control can contain one or more buttons created dynamically by templates. Rather than each button raising an event individually, events from the nested controls are "bubbled"—that is, they are sent to the naming container. The naming container in turn raises a generic event called RowCommand with parameter values. These values allow you to determine which individual control that raised the original event. By responding to this single event, you can avoid having to write individual event-handling methods for child controls.

The following example overrides the OnBubbleEvent method in a custom ASP.NET server control, ParentControl. This method is invoked when a child control of ParentControl calls the RaiseBubbleEvent method. When this happens, the ParentControl class writes two strings to the containing ASP.NET page, the first stating that its OnBubbleEvent method has been called, the second identifying the source control of the RaiseBubbleEvent method.

No code example is currently available or this language may not be supported.
public class ParentControl extends Control
    protected boolean OnBubbleEvent(Object sender, EventArgs e) 
            + " OnBubbleEvent called.");
        get_Context().get_Response().Write(("<br>Source of event is: "
            + sender.ToString()));
        return true ;
    } //OnBubbleEvent      
    protected void Render(HtmlTextWriter myWriter) 
    } //Render
} //ParentControl

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0