sliverlight本身没有提供DoubleClick，如果实现可以在网上找到很多实现发方法，

我试了几个，这边这个算是最简单的，不过对于button这种已经绑定了click触发器总是有问题，

对于其他所有控件都可以正常使用，只要绑定了MouseLeftButtonDown和MouseLeftButtonUp这两个触发器就OK了

实现原理很简单，记录MouseLeftButtonUp和MouseLeftButtonDown的时间戳，计算时间差，只要小于1/10秒就可以，大于0就算双击，就是双击中第一次点击和第二次点击时间差小于1/10秒。

实现代码：

    public class GraphicsUtils
    {
        #region Double click

///

/// Holds the millis for the first click.
///

private long lastClickedTime = 0;

///

/// Delegate definition for the call back function.
///

        ///
        ///
        public delegate void DoubleClickHandler(object sender, MouseButtonEventArgs e);

///

/// Holder for the call back function.
///

private DoubleClickHandler doubleClickCallBackFunction;
///

/// This will attach a double click to an object.
///

        ///
        /// Due to Silverlight lack of double click event a custom implementation is needed.
        /// this function and its adjacent handlers will attach a double click event to any object
        /// deriving from UIElement.
        ///
        /// the UIElement to attach the event to.
        /// the function to call upon the double click event.
        public void AttachDoubleClick(object doubleClickTarget, DoubleClickHandler function)
        {
            UIElement target = (UIElement)doubleClickTarget;
            target.MouseLeftButtonUp += new MouseButtonEventHandler(target_MouseLeftButtonUp);
            target.MouseLeftButtonDown += new MouseButtonEventHandler(target_MouseLeftButtonDown);
            doubleClickCallBackFunction = function;
        }

        private void target_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            lastClickedTime = DateTime.Now.Ticks / 10000;
        }

        private void target_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            long currentMillis = DateTime.Now.Ticks / 10000;

            if (currentMillis - lastClickedTime < 100 && currentMillis - lastClickedTime > 0)
            {
                //HERE IS DOUBLE CLICK
                doubleClickCallBackFunction(sender, e);
            }

}

#endregion
}

使用方法，比如里面有个椭圆，名称是doubleclick，那么绑定方法如下：

    GraphicsUtils.DoubleClickHandler dblClickHandler = new GraphicsUtils.DoubleClickHandler(MyMethodToHandleDoubleClick);
            GraphicsUtils gu = new GraphicsUtils();
            gu.AttachDoubleClick(this.doubleclick, dblClickHandler);

MyMethodToHandleDoubleClick是双击触发的事件，很简单，就和click事件一样写、

这个可以放在页面初始化时候进行绑定，是一个比较方便简单的方法，

原载与

http://shemesh.wordpress.com/2009/03/05/silverlight-attach-a-double-click-to-any-object/

ITPub博客

sliverlight简单方法实现双击触发

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