窗体或控件的两种拖动方式

第一种

音量调节的示例

#region 音量控制

        private Point mouse_offset;

        private void pictureBox7_MouseDown(object sender, MouseEventArgs e)

        {

            mouse_offset = new Point(-e.X, -e.Y);//

        }

private void pictureBox7_MouseMove(object sender, MouseEventArgs e)

        {

            ((Control)sender).Cursor = Cursors.Arrow;//设置拖动时鼠标箭头

            if (e.Button == MouseButtons.Left)

            {

                Point mousePos = Control.MousePosition;

                mousePos.Offset(mouse_offset.X, mouse_offset.Y);//设置偏移

                mousePos.Y = PointToScreen(pictureBox7.Location).Y;

                Point mouse_New = ((Control)sender).Parent.PointToClient(mousePos);

                if (mouse_New.X < panel1.Location.X )

                {

                    mouse_New.X = panel1.Location.X;

                }

                if (mouse_New.X > panel1.Width + panel1.Location.X)

                {

                    mouse_New.X = panel1.Width+ panel1.Location.X ;

                }

                ((Control)sender).Location = mouse_New;
panel2.Width = mouse_New.X-panel1.Location.X;

            }

        }

        #endregion

第二种

命名空间   using System.Runtime.InteropServices;

#region 窗体拖动
       
[DllImport("user32.dll")]
        public
static extern bool ReleaseCapture();
       
[DllImport("user32.dll")]
        public
static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int
lParam);
        ///
<summary>
        ///
pa_top事件
        ///
</summary>
        ///
<param name="sender"></param>
       
/// <param name="e"></param>
       
private void pa_top_MouseDown(object sender, MouseEventArgs e)
       
{
           
ReleaseCapture();
           
SendMessage(this.Handle, 0x0112, 0xF012, 0);
       
}
       
#endregion

两种方式 都可以实现窗体和控件的拖动

第二种方式更适合窗体拖动

窗体或控件的两种拖动方式,布布扣,bubuko.com