CancelCommand Event
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DataList.CancelCommand Event

Occurs when the Cancel button is clicked for an item in the DataList control.

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

public:
event DataListCommandEventHandler^ CancelCommand {
	void add (DataListCommandEventHandler^ value);
	void remove (DataListCommandEventHandler^ value);
}
/** @event */
public void add_CancelCommand (DataListCommandEventHandler value)

/** @event */
public void remove_CancelCommand (DataListCommandEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

The CancelCommand event is raised when the Cancel button is clicked for an item in the DataList control.

A typical handler for the CancelCommand event sets the EditItemIndex property to -1 (to deselect the item) and then rebinds the data to the DataList control.

Caution noteCaution

Text is not HTML encoded before it is displayed in the DataList control. This makes it possible to embed script within HTML tags in the text. If the values for the control come from user input, be sure to validate the values to reduce security vulnerabilities.

For more information about handling events, see How to: Consume Events in a Web Forms Application.

Caution noteCaution

This control can be used to display user input, which might include malicious client script. Check any information that is sent from a client for executable script, SQL statements, or other code before displaying it in your application. You can use validation controls to verify user input before displaying the input text in a control. ASP.NET provides an input request validation feature to block script and HTML in user input. For more information, see Securing Standard ControlsHow to: Protect Against Script Exploits in a Web Application by Applying HTML Encoding to Strings, and Validating User Input in ASP.NET Web Pages.

The following code example demonstrates how to specify and code a handler for the CancelCommand event. It cancels any edits made to an item in the DataList control when the Cancel button is clicked.

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.
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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