ListViewUpdateEventArgs Class
Provides data for the ItemUpdating event.
Assembly: System.Web.Extensions (in System.Web.Extensions.dll)
The ListView control raises the ItemUpdating event when the UpdateItem method is called or when an item's Update button is clicked, but before the ListView control updates the item. (An Update button is a button whose CommandName property set to "Update".) This enables you to provide an event-handling method that performs a custom routine whenever this event occurs, such as canceling the update operation.
A ListViewUpdateEventArgs object is passed to the event-handling method. This object enables you to determine the index of the current item, and to specify that the update operation should be canceled. To cancel the update operation, set the Cancel property of the ListViewUpdateEventArgs object to true. You can also work with the Keys, OldValues, and NewValues collections before the values are passed to the data source. A typical way to use these collections is to validate or to HTML-encode the values that are supplied by the user before these values are stored in the data source. This can help prevent script-injection attacks.
For a list of initial property values for an instance of the ListViewUpdateEventArgs class, see the ListViewSelectEventArgs constructor.
The following example shows how to use the NewValues property to make sure that the user has supplied all values before the data source is updated.
Security Note: |
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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. |
- AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand. Associated enumeration: AspNetHostingPermissionLevel::Minimal
- AspNetHostingPermission
for operating in a hosted environment. Demand value: InheritanceDemand. Associated enumeration: AspNetHostingPermissionLevel::Minimal
System::EventArgs
System.ComponentModel::CancelEventArgs
System.Web.UI.WebControls::ListViewUpdateEventArgs
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Security Note: