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FormViewUpdateEventHandler Delegate

Represents the method that handles the ItemUpdating event of a FormView control.

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

type FormViewUpdateEventHandler = 
    delegate of  
        sender:Object * 
        e:FormViewUpdateEventArgs -> unit

Parameters

sender
Type: System.Object

The source of the event.

e
Type: System.Web.UI.WebControls.FormViewUpdateEventArgs

A FormViewUpdateEventArgs that contains the event data.

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 or validating the values of a record before updating it in the data source, whenever this event occurs.

When you create a FormViewUpdateEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.

The following example demonstrates how to programmatically add a FormViewUpdateEventHandler delegate to the ItemUpdating event of a FormView control.

Security noteSecurity Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

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

The following example demonstrates how to declaratively add a FormViewUpdateEventHandler delegate to the ItemUpdating event of a FormView control.

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

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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