winfrom 保存图片

 1  private void btnSave_Click(object sender, EventArgs e)
 2         {
 3             SaveFileDialog sfd = new SaveFileDialog();
 4             sfd.Filter = "BMP (*.bmp)|*.bmp|GIF (*.gif)|*.gif|JPG (*.jpg)|*.jpg|PNG (*.png)|*.png|TIFF (*.tif)|*.tif";
 5             sfd.AddExtension = true;
 6             if (sfd.ShowDialog() == DialogResult.OK)
 7             {
 8                 SaveTypes savetype = SaveTypes.UNSPECIFIED;
 9                 switch (sfd.FilterIndex)
10                 {
                            //图片格式
11                     case 1:  savetype = SaveTypes.BMP; break;
12                     case 2:  savetype = SaveTypes.GIF; break;
13                     case 3:  savetype = SaveTypes.JPG; break;
14                     case 4:  savetype = SaveTypes.PNG; break;
15                     case 5:  savetype = SaveTypes.TIFF; break;
16                     default: break;
17                 }
18                 SaveImage(sfd.FileName, savetype, barcode.Image);
19             }
20         }

     public enum SaveTypes : int { JPG, BMP, PNG, GIF, TIFF, UNSPECIFIED }

 1  public void SaveImage(string Filename, SaveTypes FileType, Image image)
 2         {
 3             try
 4             {
 5                 if (image != null)
 6                 {
 7                     ImageFormat imageformat;
 8                     switch (FileType)
 9                     {
10                         case SaveTypes.BMP: imageformat = ImageFormat.Bmp; break;
11                         case SaveTypes.GIF: imageformat = ImageFormat.Gif; break;
12                         case SaveTypes.JPG: imageformat = ImageFormat.Jpeg; break;
13                         case SaveTypes.PNG: imageformat = ImageFormat.Png; break;
14                         case SaveTypes.TIFF: imageformat = ImageFormat.Tiff; break;
15                         default: imageformat = ImageFormat.Bmp; break;
16                     }
17                     ((Bitmap)image).Save(Filename, imageformat);
18                 }
19             }
20             catch (Exception ex)
21             {
22                 throw new Exception(" 无法保存图像。" + ex.Message);
23             }
24         }