Button.OnCommand Method

Raises the Command event of the Button control.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected:
virtual void OnCommand (
	CommandEventArgs^ e
)
protected void OnCommand (
	CommandEventArgs e
)
protected function OnCommand (
	e : CommandEventArgs
)
Not applicable.

Parameters

e

The event data.

The Command event is raised when the Button control is clicked. This event is commonly used when a command name, such as Sort, is associated with the Button control. This allows you to create multiple Button controls on a Web page and programmatically determine which Button control is clicked.

NoteNote:

The Command event is raised through the control hierarchy in the form of the BubbleEvent.

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

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

The following code example demonstrates how to specify and code an event handler for the Command event to sort a list when the Button control is clicked. This example specifies the event handler declaratively, using the OnClick property of the Button control.

No code example is currently available or this language may not be supported.

The following code example demonstrates how to specify the event handler and programmatically add it to the event in the Page_Load method.

No code example is currently available or this language may not be supported.

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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