判断图片上传

 1 private bool IsImage(string filePath)
 2         {
 3             Image image;
 4             try
 5             {
 6                 image = Image.FromFile(filePath);
 7                 image.Dispose();
 8                 return true;
 9             }
10             catch (Exception ex)
11             {
12                 return false;
13             }
14         }