C#实现鼠标拖动自定义窗口

1. 首先要把Winform默认的边框去掉：

this.FormBorderStyle = FormBorderStyle.None;

    

图1 默认窗口                    图2 去掉默认边框

 

1. 在窗体上拖入一个panel，设置panel属性，并拖入本身想要的控件。

1. panel1.Dock = DockStyle.Fill;
2. panel1.BackgroundImage = 诚信.Properties.Resources.login;
3. panel1.BackgroundImageLayout = ImageLayout.Stretch;
   1. 给panel添加三个事件: MouseUp、MouseMove、MouseDown。便可实现鼠标拖动窗体移动。
4. private bool formMove = false;//窗体是否移动
5. private Point formPoint;//记录窗体的位置
6.  
7. #region 拖动窗体移动
8. private void panel1_MouseUp(object sender, MouseEventArgs e)
9. {
10.  
11.     if (e.Button == MouseButtons.Left)//按下的是鼠标左键
12.     {
13.          formMove = false;//中止移动
14.     }
15.  
16. }
17.  
18. private void panel1_MouseMove(object sender, MouseEventArgs e)
19. {
20.     if (formMove == true)
21.     {
22.         Point mousePos = Control.MousePosition;
23.         mousePos.Offset(formPoint.X, formPoint.Y);
24.         Location = mousePos;
25.     }
26. }
27.  
28. private void panel1_MouseDown(object sender, MouseEventArgs e)
29. {
30.     formPoint = new Point();
31.     int xOffset;
32.     int yOffset;
33.     if (e.Button == MouseButtons.Left)
34.     {
35.         xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
36.         yOffset = -e.Y - SystemInformation.FrameBorderSize.Height;//SystemInformation.CaptionHeight -
37.         formPoint = new Point(xOffset, yOffset);
38.         formMove = true;//开始移动
39.     }
40. }
41. #endregion
    1. 运行结果

       图3 运行结果