C#中无边框窗体拖动

         //定义一个bool变量标识是否拖动窗体
         private bool isMove = false;
         //记录鼠标的位置
         private Point point;

定义的变量

         /// <summary>
         /// 窗体的鼠标按下事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Form1_MouseDown(object sender, MouseEventArgs e)
         {
             isMove = true;
             //记录鼠标的位置
             point = e.Location;
         }        

窗体的鼠标按下事件

         /// <summary>
         /// 窗体的鼠标移动事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Form1_MouseMove(object sender, MouseEventArgs e)
         {
             //是否移动窗体
             if (isMove)
             {
                 //记录鼠标移动后的值
                 Point p = e.Location;
                 //计算鼠标按下和移动后的距离
                 int x = p.X - point.X;
                 int y = p.Y - point.Y;
                 //窗体的位置
                 this.Location = new Point(this.Location.X + x, this.Location.Y + y);
             }
         }

鼠标移动事件

         /// <summary>
         /// 鼠标弹起事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void Form1_MouseUp(object sender, MouseEventArgs e)
         {
             //不允许在移动窗体
             isMove = false;
         }

鼠标弹起事件

Demo下载地址：

无边框拖动窗体.zip