ASP.NET在图片上加入图片版权信息(在图片上打水印)

N年前写的在图片上打水印的程序：

  /// <summary>
  /// 在图片上加入图片版权信息
  /// </summary>
  /// <param name="strFileName">输入图片(绝对路径)</param>
  /// <param name="strOutfileName">输出图片(绝对路径)</param>
  /// <param name="strCopyRightFile">水印图片(绝对路径)</param>
  /// <param name="StrPlace">水印位置</param>
  /// <param name="bolFileName">是否删除输入图片</param>
  public static void CreateCopyRightImage(string strFileName, string strOutfileName, string strCopyRightFile, string StrPlace, bool bolFileName)
  {
   System.Drawing.Image MyImage     = System.Drawing.Image.FromFile( strFileName );
   System.Drawing.Image CopyMyImage = System.Drawing.Image.FromFile( strCopyRightFile );
   System.Drawing.Bitmap OutPut     = new System.Drawing.Bitmap( MyImage );
   System.Drawing.Graphics GImage   = System.Drawing.Graphics.FromImage( OutPut );

   int IntX = 0;
   int IntY = 0;
   if (StrPlace == "1")   // 在左上
   {
    IntX = 0;
    IntY = 0;
   }
   else if (StrPlace == "2")  // 在正上
   {
    IntX = (MyImage.Width-CopyMyImage.Width)/2;
    IntY = 0;
   }
   else if (StrPlace == "3")  // 在右上
   {
    IntX = MyImage.Width-CopyMyImage.Width;
    IntY = 0;
   }
   else if (StrPlace == "4")  // 在正左
   {
    IntX = 0;
    IntY = (MyImage.Height-CopyMyImage.Height)/2;
   }
   else if (StrPlace == "5")  // 在中间
   {
    IntX = (MyImage.Width-CopyMyImage.Width)/2;
    IntY = (MyImage.Height-CopyMyImage.Height)/2;
   }
   else if (StrPlace == "6")  // 在正右
   {
    IntX = MyImage.Width-CopyMyImage.Width;
    IntY = (MyImage.Height-CopyMyImage.Height)/2;
   }
   else if (StrPlace == "7")  // 在左下
   {
    IntX = 0;
    IntY = MyImage.Height-CopyMyImage.Height;
   }
   else if (StrPlace == "8")  // 在正下
   {
    IntX = (MyImage.Width-CopyMyImage.Width)/2;
    IntY = MyImage.Height-CopyMyImage.Height;
   }
   else if (StrPlace == "9")  // 在右下
   {
    IntX = MyImage.Width-CopyMyImage.Width;
    IntY = MyImage.Height-CopyMyImage.Height;
   }
   else
   {
    IntX = MyImage.Width-CopyMyImage.Width-10;
    IntY = MyImage.Height-CopyMyImage.Height-10;
   }

   // 画出水印的位置
   GImage.DrawImage(CopyMyImage, IntX, IntY, CopyMyImage.Width, CopyMyImage.Height);

   string strExtend = strFileName.Substring(strFileName.LastIndexOf(".") + 1).ToLower();

   switch ( strExtend )
   {
    case "bmp" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Bmp);
     break;
    case "jpg" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Jpeg);
     break;
    case "gif" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Gif);
     break;
    case "icon" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Icon);
     break;
    case "png" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Png);
     break;
    case "tif" :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Tiff);
     break;
    default :
     OutPut.Save(strOutfileName, System.Drawing.Imaging.ImageFormat.Jpeg);
     break;
   }
  
   GImage.Dispose();
   OutPut.Dispose();
   MyImage.Dispose();
   CopyMyImage.Dispose();

   if( bolFileName )
    File.Delete( strFileName );
  }