ISelectionService.SelectionChanging Event

Occurs when the current selection is about to change.

Namespace: System.ComponentModel.Design
Assembly: System (in system.dll)

event EventHandler SelectionChanging
/** @event */
void add_SelectionChanging (EventHandler value)

/** @event */
void remove_SelectionChanging (EventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

Minimize processing when handling this event, because processing that occurs within this event handler can significantly affect the overall performance of the form designer.

The following example illustrates how to use the SelectionChanging event.

                // Add SelectionChanging event handler to event
                m_selectionService.SelectionChanging += new EventHandler(OnSelectionChanging);

...

    /* This is the OnSelectionChanging handler method.  This method calls
        OnUserChange to display a message that indicates the name of the
        handler that made the call and the type of the event argument. */
    private void OnSelectionChanging(object sender, EventArgs args) 
    {
        OnUserChange("OnSelectionChanging", args.ToString());
    }

        // Add SelectionChanging event handler to event
        mSelectionService.add_SelectionChanging(
            new EventHandler(OnSelectionChanging));

...

/* This is the OnSelectionChanging handler method.  This method calls
        OnUserChange to display a message that indicates the name of the
        handler that made the call and the type of the event argument. 
 */
private void OnSelectionChanging(Object sender, EventArgs args)
{
    OnUserChange("OnSelectionChanging", args.ToString());
} //OnSelectionChanging

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, 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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