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FormView.ItemUpdating Event

Occurs when an Update button within a FormView control is clicked, but before the update operation.

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

public:
event FormViewUpdateEventHandler^ ItemUpdating {
	void add (FormViewUpdateEventHandler^ value);
	void remove (FormViewUpdateEventHandler^ value);
}
/** @event */
public void add_ItemUpdating (FormViewUpdateEventHandler value)

/** @event */
public void remove_ItemUpdating (FormViewUpdateEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

The FormView control raises the ItemUpdating event when an Update button (a button with its CommandName property set to "Update") within the control is clicked, but before the FormView control updates the record. This allows you to provide an event-handling method that performs a custom routine, such as HTML encoding the values of a record before updating it in the data source, whenever this event occurs.

A FormViewUpdateEventArgs object is passed to the event-handling method, which allows you to determine the value of an optional command argument sent to the FormView control and to indicate that the update operation should be canceled. The command argument value corresponds to the CommandArgument property of the Update button. When the CommandArgument property of the Update button is set, use the CommandArgument property to determine the value of the command argument. To cancel the update operation, set the Cancel property to true. You can also read or modify the new values entered by the user by using the Keys and NewValues properties. The Keys property contains the key fields, while the NewValues property contains the non-key fields. If you need to access the original non-key field values, use the OldValues property.

For more information about handling events, see Consuming Events.

The following example demonstrates how to use the ItemUpdating event to cancel an update operation.

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

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

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