winform移动图片

 1         private bool canMove = false;
 2         private Point mousePos;
 3
 4         private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
 5         {
 6             if (this.canMove)
 7             {
 8                 pictureBox1.Location = new Point(pictureBox1.Location.X
 9                 - mousePos.X + e.X, pictureBox1.Location.Y
10                 - mousePos.Y + e.Y);
11             }
12         }
13 
14         private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
15         {
16             this.canMove = true;
17             this.mousePos = new Point(e.X, e.Y);  
18         }
19 
20         private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
21         {
22             this.canMove = false;   
23         }