图片切换（timer控件与ImagesList结合使用）

1. private void Form3_Load(object sender, EventArgs e)
2.         {
3.             //打开窗体的时候显示第一张图片
4.             this.pictureBox1.Image = this.imageList1.Images[0];
5.             //启动timer控件
6.             this.timer1.Start();
7.         }
8. //计数器
9. private int currIndex = 0;
10. private bool flag = true;//开关
11. private void timer1_Tick(object sender, EventArgs e)
12.         {
13.             if (flag)
14.             {
15.                 //判断是否为第一张
16. 　　　　　  //不是第一张
17.                 if (currIndex > 0)
18.                     //显示上一张图片
19.                     currIndex--;
20.                 else
21.                     //是第一张
22.                     flag = false;
23.             }
24.             else
25.             {
26.                 //判断是否为第一张
27. 　　　　　  //不是最后一张
28.                 if (currIndex < this.imageList1.Images.Count - 1)
29.                     //显示下下一张图片
30.                     currIndex++;
31.                 else//是最后一张
32.                     flag = true;
33.             }
34.             this.pictureBox1.Image = this.imageList1.Images[currIndex];
35.         }
36. private bool flag1 = true;
37. private void pictureBox1_Click(object sender, EventArgs e)
38.         {
39.             if (flag1)
40.             {
41. 　　　　　  //停止
42.                 timer1.Stop();
43.                 flag1 = false;
44.             }
45.             else
46.             {
47.                 //启动
48.                 timer1.Start();
49.                 flag1 = true;
50.             }
51.         }