cefsharp 模拟点击的坑

网上说的基本都是：

 host.SendMouseClickEvent(x, y, MouseButtonType.Left, false, 1, CefEventFlags.None);//按下鼠标左键
            Thread.Sleep(50);
 host.SendMouseClickEvent(x, y, MouseButtonType.Left, true, 1, CefEventFlags.None);//松开鼠标左键

但现实如下：

 var host = browser.GetHost();
            var x = Convert.ToInt32(left) + 5;
            var y = Convert.ToInt32(top) + 5;
            host.SendMouseMoveEvent(x, y, false, CefEventFlags.None);//移动鼠标
            Thread.Sleep(50);
            host.SendMouseClickEvent(x, y, MouseButtonType.Left, false, 1, CefEventFlags.None);//按下鼠标左键
            Thread.Sleep(50);
            host.SendMouseClickEvent(x, y, MouseButtonType.Left, true, 1, CefEventFlags.None);//松开鼠标左键