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FormView.OnModeChanging Method

Raises the ModeChanging event.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)
protected virtual void OnModeChanging(
	FormViewModeEventArgs e
)

Parameters

e
Type: System.Web.UI.WebControls.FormViewModeEventArgs

A FormViewModeEventArgs that contains the event data.

ExceptionCondition
HttpException

This method is called when the FormView control is not bound to a data source control, the mode change was not canceled, and an event handler is not registered for the event.

The OnModeChanging method is called by the FormView control to raise the ModeChanging event. It is generally used by control developers when extending the FormView class.

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

The OnModeChanging 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 OnModeChanging in a derived class, be sure to call the base class's OnModeChanging method so that registered delegates receive the event.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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