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ListView.OnItemDeleting Method

Raises the ItemDeleting event.

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

protected virtual void OnItemDeleting(
	ListViewDeleteEventArgs e
)

ExceptionCondition
InvalidOperationException

The ListView control is not bound to a data source control by using the DataSourceID property.

The ItemDeleting event is raised when an item's Delete button is clicked or the DeleteItem method is called, but before the ListView control deletes the item. (A Delete button is a button control whose CommandName property is set to "Delete".) This enables you to perform a custom routine whenever this event occurs, such as canceling the delete operation.

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

The OnItemDeleting method also enables 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 Inheritors

When you override OnItemDeleting in a derived class, call the base class's OnItemDeleting method so that registered delegates receive the event.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5
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