public static void Show(Action callback, string mes = "有一种幸福，叫做等待...")
{
WaitingBox win = new WaitingBox(callback);
win.WindowStartupLocation = WindowStartupLocation.CenterScreen;
win.Text = mes;
win.ShowDialog();
}
/// <summary>
/// 显示等待框，owner指定宿主视图元素，callback为需要执行的方法体（需要自己做异常处理）。
/// 目前等等框为模式窗体
/// </summary>
public static void Show(FrameworkElement owner, Action callback, string mes = "有一种幸福，叫做等待...")
{
WaitingBox win = new WaitingBox(callback);
Window pwin = Window.GetWindow(owner);
win.Owner = pwin;
win.Text = mes;
//var loc = owner.PointToScreen(new Point());
//win.Left = loc.X + (owner.ActualWidth - win.Width) / 2;
//win.Top = loc.Y + (owner.ActualHeight - win.Height) / 2;
win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
win.ShowDialog();
}