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MouseButtonEventHandler Delegate

Represents the method that will handle mouse button related events such as MouseDown and MouseUp.

Namespace: System.Windows.Input
Assembly: PresentationCore (in presentationcore.dll)

public delegate void MouseButtonEventHandler (
	Object sender,
	MouseButtonEventArgs e
)
/** @delegate */
public delegate void MouseButtonEventHandler (
	Object sender, 
	MouseButtonEventArgs e
)
In XAML, you can use delegates but you cannot define your own.

Parameters

sender

The source of the event.

e

The event data.

This delegate is used with the following events: MouseDown, MouseUp, MouseLeftButtonDown, MouseLeftButtonUp, MouseRightButtonDown, MouseRightButtonUp, and the corresponding tunneling events.

When you create a MouseButtonEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.

The following example creates a MouseDown event handler that changes the background color of the source of the event. The background color is determined by which button is pressed.

private void MouseButtonDownHandler(object sender, MouseButtonEventArgs e)
{
    Control src = e.Source as Control;

    if (src != null)
    {
        switch (e.ChangedButton)
        {
            case MouseButton.Left:
                src.Background = Brushes.Green;
                break;
            case MouseButton.Middle:
                src.Background = Brushes.Red;
                break;
            case MouseButton.Right:
                src.Background = Brushes.Yellow;
                break;
            case MouseButton.XButton1:
                src.Background = Brushes.Brown;
                break;
            case MouseButton.XButton2:
                src.Background = Brushes.Purple;
                break;
            default:
                break;
        }
    }
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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

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