ImageButton.OnClick Method

Raises the Click event and allows you to handle the Click event directly.

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

protected:
virtual void OnClick (
	ImageClickEventArgs^ e
)
protected void OnClick (
	ImageClickEventArgs e
)
protected function OnClick (
	e : ImageClickEventArgs
)

Parameters

e

A System.Web.UI.ImageClickEventArgs that contains the event data.

The Click event is raised when the ImageButton control is clicked. By using the OnClick event handler, you can programmatically determine the coordinates where the image is clicked. You can then code a response, based on the values of these coordinates. Note that the origin (0, 0) is located at the upper left corner of the image.

Raising an event invokes the event handler through a delegate. For more information, see How to: Consume Events in a Web Forms Application.

The OnClick method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors When overriding OnClick in a derived class, be sure to call the base class's OnClick method so that registered delegates receive the event.

The following example demonstrates how to specify and code a handler for the Click event to display the coordinates where the user clicks the image.

NoteNote

The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Page Code Model.

No code example is currently available or this language may not be supported.

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

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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