(转)silverlight中button不响应mouseleftbuttondown的原因

How to handle the MouseLeftButtonDown and MouseLeftButtonUp events of the Button control?

Have you ever noticed that the MouseLeftButtonDown and MouseLeftButtonUp events are not fired when a Silverlight button is clicked? The reason for this is that the button handles these two events itself by overriding the OnMouseLeftButtonDown and the OnMouseLeftButtonUp handlers. In the OnMouseLeftButtonDown override, the Click event is raised and the MouseLeftButtonDown event is marked as handled so it couldn't bubble in the visual tree. The OnMouseLeftButtonUp override also marks the MouseLeftButtonUp as handled.

This thing can be changed using the ClickMode property of the Button control. It has the following values - Hover, Press, Release. The default one is Pressed and we have already explained it. When we have ClickMode set to Release, the Click event will be raised in the OnMouseLeftButtonUp override and the MouseLeftButtonDown and MouseLeftButtonUp events will be handled inside the button again. If we set the ClickMode to Hover, the Click event will be raised with the MouseEnter event and we will also be able to use the mouse button events.

转自：http://www.silverlightshow.net/tips/Tip-How-to-handle-the-MouseLeftButtonDown-and-MouseLeftButtonUp-events-of-the-Button-control.aspx