ListView.OnItemDeleting(ListViewDeleteEventArgs) Method

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.Extensions.dll

Important

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Raises the ItemDeleting event.

protected:
 virtual void OnItemDeleting(System::Web::UI::WebControls::ListViewDeleteEventArgs ^ e);

protected virtual void OnItemDeleting (System.Web.UI.WebControls.ListViewDeleteEventArgs e);

abstract member OnItemDeleting : System.Web.UI.WebControls.ListViewDeleteEventArgs -> unit
override this.OnItemDeleting : System.Web.UI.WebControls.ListViewDeleteEventArgs -> unit

Protected Overridable Sub OnItemDeleting (e As ListViewDeleteEventArgs)

Parameters

e: ListViewDeleteEventArgs

The event data.

Exceptions

InvalidOperationException

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

Remarks

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 Handling and Raising Events.

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(ListViewDeleteEventArgs) in a derived class, call the base class's OnItemDeleting(ListViewDeleteEventArgs) method so that registered delegates receive the event.

Applies to