C# 实现无标题栏窗口拖动效果

1  /* 首先将窗体的边框样式修改为None，让窗体没有标题栏
2  * 实现这个效果使用了三个事件：鼠标按下、鼠标弹起、鼠标移动
3  * 鼠标按下时更改变量isMouseDown标记窗体可以随鼠标的移动而移动
4  * 鼠标移动时根据鼠标的移动量更改窗体的location属性，实现窗体移动
5  * 鼠标弹起时更改变量isMouseDown标记窗体不可以随鼠标的移动而移动
6  */
7 private bool isMouseDown = false;
8 private Point FormLocation;     //form的location
9 private Point mouseOffset;      //鼠标的按下位置
10 private void Form1_MouseDown(object sender, MouseEventArgs e)
11 {
12     if (e.Button == MouseButtons.Left)
13     {
14         isMouseDown = true;
15         FormLocation = this.Location;
16         mouseOffset = Control.MousePosition;
17     }
18 }
19
20 private void Form1_MouseUp(object sender, MouseEventArgs e)
21 {
22     isMouseDown = false;
23 }
24
25 private void Form1_MouseMove(object sender, MouseEventArgs e)
26 {
27     int _x = 0;
28     int _y = 0;
29     if (isMouseDown)
30     {
31         Point pt = Control.MousePosition;
32         _x = mouseOffset.X - pt.X;
33         _y = mouseOffset.Y - pt.Y;
34
35         this.Location = new Point(FormLocation.X - _x, FormLocation.Y - _y);
36     }
37
38 }