C#實現鼠標拖動自定義窗口

1. 首先要把Winform默認的邊框去掉：

this.FormBorderStyle = FormBorderStyle.None;

    

圖1 默認窗口                    圖2 去掉默認邊框

 

1. 在窗體上拖入一個panel，設置panel屬性，並拖入本身想要的控件。

1. panel1.Dock = DockStyle.Fill;
2. panel1.BackgroundImage = 誠信.Properties.Resources.login;
3. panel1.BackgroundImageLayout = ImageLayout.Stretch;
   1. 給panel添加三個事件: MouseUp、MouseMove、MouseDown。便可實現鼠標拖動窗體移動。
4. private bool formMove = false;//窗體是否移動
5. private Point formPoint;//記錄窗體的位置
6.  
7. #region 拖動窗體移動
8. private void panel1_MouseUp(object sender, MouseEventArgs e)
9. {
10.  
11.     if (e.Button == MouseButtons.Left)//按下的是鼠標左鍵
12.     {
13.          formMove = false;//中止移動
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;//開始移動
39.     }
40. }
41. #endregion
    1. 運行結果

       圖3 運行結果