//是否在拖拽 bool isDrag = false; //鼠标相对于button控件左上角的坐标 Point contextbtnPoint = Point.Empty; private void button1_MouseDown(object sender, MouseEventArgs e) { isDrag = true; if (e.Button == MouseButtons.Left) { contextbtnPoint = button1.PointToClient(Control.MousePosition); //鼠标相对于button左上角的坐标 } } private void button1_MouseMove(object sender, MouseEventArgs e) { if (isDrag) { Point formPoint = this.PointToClient(Control.MousePosition);//鼠标相对于窗体左上角的坐标 int x = formPoint.X - contextbtnPoint.X; int y = formPoint.Y - contextbtnPoint.Y; button1.Location = new Point(x, y); } } private void button1_MouseUp(object sender, MouseEventArgs e) { if (isDrag) { isDrag = false; } }