为超图三维场景添加屏幕快照功能

 1 public static void saveSceneScreenShot(Control control)
 2 {
 3     Image objImage = getSceneScreenShot(control);
 4     if (objImage != null)
 5     {
 6         SaveFileDialog saveImageDialog = new SaveFileDialog();
 7         saveImageDialog.Title = "场景快照";
 8         saveImageDialog.Filter = @"png|*.png|jpeg|*.jpg|bmp|*.bmp";
 9         if (saveImageDialog.ShowDialog() == DialogResult.OK)
10         {
11             string fileName = saveImageDialog.FileName.ToString();
12             if (fileName != "" && fileName != null)
13             {
14                 string fileExtName = fileName.Substring(fileName.LastIndexOf(".") + 1).ToString();
15                 System.Drawing.Imaging.ImageFormat imgformat = System.Drawing.Imaging.ImageFormat.Png;
16                 if (fileExtName != "")
17                 {
18                     switch (fileExtName)
19                     {
20                         case "jpg":
21                             imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
22                             break;
23                         case "bmp":
24                             imgformat = System.Drawing.Imaging.ImageFormat.Bmp;
25                             break;
26                         case "png":
27                             imgformat = System.Drawing.Imaging.ImageFormat.Png;
28                             break;
29                         default:
30                             break;
31                     }
32                             
33                     objImage.Save(fileName, imgformat);                           
34                 }
35             }
36         }
37     }
38 }
39 
40 public static Image getSceneScreenShot(Control control)
41 {
42     Image objImage = null;
43 
44     try
45     {
46         int width = control.Width;
47         int height = control.Height;
48         Point pt = control.PointToScreen(new Point(0, 0)); // 客户区坐标转换为屏幕坐标
49 
50         objImage = new Bitmap(width, height);
51 
52         Graphics g = Graphics.FromImage(objImage);
53                 
54         g.CopyFromScreen(pt, new Point(0, 0), new Size(width, height));
55 
56         IntPtr dc1 = g.GetHdc();
57 
58         g.ReleaseHdc(dc1);
59     }
60     catch(Exception ex)
61     {
62         MessageBox.Show(ex.Message);
63     }
64 
65     return objImage;
66 }