问题
I made Button in Xaml. I would like to fire MouseDown event:
MouseDown="Button_MouseDown_1"
I implemented this method in codeBehind, but it doesn't work. But if I implement this method:
MouseMove="Button_MouseMove_1"
Implementation works. Where is the problem ?
Seba.
回答1:
The Button element itself is handling the mouse down event before your event handler gets called - meaning your event handler wont get called.
More than likely what you're actually wanting to implement is the Click event though (e.g.):
Click="button1_Click"
This will respond to the button getting clicked by the mouse or if it has focus and enter is pressed etc...
But if you really do need to specifically implement a handler for the mousedown event on the button you can use the PreviewMouseDown event which your handler will be notified of.
MSDN: Routed Events Overview can give more detail of how routed events work.
来源：https://stackoverflow.com/questions/11961084/mousemove-works-mousedown-does-not-wpf-xaml