HiddenField.OnValueChanged(EventArgs) Method

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

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Raises the ValueChanged event.

protected:
 virtual void OnValueChanged(EventArgs ^ e);

protected virtual void OnValueChanged(EventArgs e);

abstract member OnValueChanged : EventArgs -> unit
override this.OnValueChanged : EventArgs -> unit

Protected Overridable Sub OnValueChanged (e As EventArgs)

Parameters

e: EventArgs

An EventArgs object that contains the event data.

Remarks

The ValueChanged event is raised when the value of the 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 Handling and Raising Events.

The OnValueChanged 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 OnValueChanged(EventArgs) method in a derived class, be sure to call the base class' OnValueChanged(EventArgs) method so that registered delegates receive the event.

Applies to

Продукт	Версії
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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