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MouseButtonEventHandler, délégué

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

Espace de noms: System.Windows.Input
Assembly : PresentationCore (dans presentationcore.dll)

public delegate void MouseButtonEventHandler (
	Object sender,
	MouseButtonEventArgs e
)
/** @delegate */
public delegate void MouseButtonEventHandler (
	Object sender, 
	MouseButtonEventArgs e
)
Dans XAML, vous pouvez utiliser des délégués, mais vous ne pouvez pas définir vos propres délégués.

Paramètres

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 Événements et délégués.

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;
        }
    }
}

Microsoft .NET Framework 3.0 est pris en charge sur Windows Vista, Microsoft Windows XP SP2 et Windows Server 2003 SP1.

.NET Framework

Prise en charge dans : 3.0
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