ImageButton::OnClick Method
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Parameters
- e
- Type: System.Web.UI::ImageClickEventArgs
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 InheritorsWhen 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.
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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. |
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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