Question

我的问题很简单。是否有可能在WPF中的keyup和keydown事件中触发mouseup和mousedown。

我在自定义控件中设置了鼠标按下和鼠标按下的事件处理程序。如果用户尝试按我的自定义按钮上的空格键，我想触发相同的内容。

    private void CustomButton_MouseDown(object sender, MouseButtonEventArgs e)
    {
        eventlabel.Content = "Mousedown event Triggered";            
    }

    private void CustomButton_MouseUp(object sender, MouseButtonEventArgs e)
    {
        eventlabel.Content = "MouseUp event Triggered";
    }

    private void CustomButton_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Space)
        {
            //Need to trigger all the handlers of mousedown
        }
    }

    private void CustomButton_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Space)
        {
            //Need to trigger all the handlers of mouseup
        }
    }

Answer 1

您可以使用RaiseEvent（EventArgs）在所有UIElements中引发事件。 MouseButtonArgsEventsArgs可以在KeyDown-EventHandler中使用：

  MouseDevice mouseDevice = Mouse.PrimaryDevice;
  MouseButtonEventArgs mouseButtonEventArgs = new MouseButtonEventArgs(mouseDevice, 0, MouseButton.Left); 
  mouseButtonEventArgs.RoutedEvent = Mouse.MouseDownEvent;
  mouseButtonEventArgs.Source = this;
  RaiseEvent(mouseButtonEventArgs);

（来自https://social.msdn.microsoft.com/Forums/vstudio/de-DE/7ec6b75b-b808-48ca-a880-fafa9025da6e/how-to-raise-a-click-event-on-an-uielement?forum=wpf的修改示例）

Answer 2

Tobias提到的答案对我有用。但是，它需要一些调整。

elementName.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
  RoutedEvent = Mouse.MouseDownEvent,
  Source = this,
});

Here是参考

在keyup上触发mouseup事件 - WPF

2 个答案: