ObjectDataSourceView.OnUpdating Method (ObjectDataSourceMethodEventArgs)
Raises the Updating event before the ObjectDataSourceView object attempts an update operation.
Assembly: System.Web (in System.Web.dll)
abstract OnUpdating : e:ObjectDataSourceMethodEventArgs -> unit override OnUpdating : e:ObjectDataSourceMethodEventArgs -> unit
Parameters
- e
-
Type:
System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs
An ObjectDataSourceMethodEventArgs that contains the event data.
Raising an event invokes the event handler through a delegate. For more information, see NIB: Consuming Events.
The OnUpdating method also allows 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 overriding the OnUpdating method in a derived class, be sure to call the OnUpdating method for the base class so that registered delegates receive the event.
The following code example demonstrates how to use a DropDownList control, TextBox controls, and several ObjectDataSource controls to update data. The DropDownList displays the name of a NorthwindEmployee, while the TextBox controls are used to enter and update address information. Because the UpdateParameters collection contains a ControlParameter object that is bound to the selected value of the DropDownList, the button that triggers the Update operation is enabled only after an employee is selected.
Available since 2.0