/// <summary>
        /// 分享按钮
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ShareBtn_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (shareWindow == null)
            {
                shareWindow            = new ShareWindow();
                shareWindow.mainWindow = this;
                var p = ShareBtn.PointToScreen(new System.Windows.Point(0, 0));

                shareWindow.WindowStartupLocation = WindowStartupLocation.Manual;
                shareWindow.Left  = p.X - 380;
                shareWindow.Top   = p.Y + 40;
                shareWindow.Owner = this;
                shareWindow.ShowDialog();
            }
            else
            {
                shareWindow.Close();
                shareWindow = null;
            }
        }
 /// <summary>
 /// 分享窗口关闭
 /// </summary>
 public void CloseShareWindow()
 {
     shareWindow.Close();
     shareWindow = null;
 }