几行代码 轻松实现在窗体上按住鼠标实现拖动窗体

3个变量  1个Bool  两个 int

当然这是实时移动的，其实是比较耗资源的，

如果要实现单击后只拖动出来一个虚框，放开鼠标再在目标点重绘

实现的逻辑是一样，唯一不一样的是 Move方法里 不是 实时变动this.Left 和 Top 而是实时在屏幕上画虚框

 

 

private static bool CanMove = false; private static int X_Diff = 0; private static int Y_Diff = 0; private void UCS_Login_MouseDown(object sender, MouseEventArgs e) { X_Diff = Cursor.Position.X - this.Left; Y_Diff = Cursor.Position.Y - this.Top; CanMove = true; } private void UCS_Login_MouseUp(object sender, MouseEventArgs e) { CanMove = false; } private void UCS_Login_MouseMove(object sender, MouseEventArgs e) { if (CanMove) { Point p_Cursor = Cursor.Position; this.Left = p_Cursor.X - X_Diff; this.Top = p_Cursor.Y - Y_Diff; } }