The HiddenField.ValueChanged event is raised when the value of the System.Web.UI.WebControls.HiddenField control changes between posts to the server. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.

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

The HiddenField.OnValueChanged(EventArgs) 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.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0