1 float cnt = -60; //旋转的角度
2
3 //Timer定时器
4 private void timer1_Tick(object sender, EventArgs e)
5 {
6 timer1.Enabled = false;
7 Image img = Image.FromFile(@"F:\Hanzhaoxun\公司软件备份\其他\仪表盘\指针.png"); //图片路径
8 cnt += 4;
9 if (cnt >= 25)
10 {
11 cnt = -60;
12 }
13 this.pictureBox1.Image = RotateImage(img, cnt);
14 label1.Text = cnt.ToString();
15 timer1.Enabled = true;
16 }
17
18 //实现图片旋转的方法
19 public static Image RotateImage(Image img, float a)
20 {
21 Bitmap b = new Bitmap(img.Width, img.Height);
22 Graphics g = Graphics.FromImage(b);
23 g.TranslateTransform((float)b.Width / 2, (float)b.Height / 2);
24 g.RotateTransform(a);
25 g.TranslateTransform(-(float)b.Width / 2, -(float)b.Height / 2);
26 g.InterpolationMode = InterpolationMode.HighQualityBicubic;
27 g.DrawImage(img, new Point(0, 0));
28 g.Dispose();
29 return b;
30 }
