用于图片切割，图片压缩，缩略图的生成代码,CSharp代码库,德仔网

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【CSharp】用于图片切割，图片压缩，缩略图的生成
作者:Dezai.CN / 发布于2012/3/6/ 685
<div> /// <summary></div>
<div>  /// 图片切割函数</div>
<div>  /// </summary></div>
<div>  /// <param name="sourceFile">原始图片文件</param></div>
<div>  /// <param name="xNum">在Ｘ轴上的切割数量</param></div>
<div>  /// <param name="yNum">在Ｙ轴上的切割数量</param></div>
<div>  /// <param name="quality">质量压缩比</param></div>
<div>  /// <param name="outputFile">输出文件名，不带后缀</param></div>
<div>  /// <returns>成功返回true，失败则返回false</returns></div>
<div>  public static bool imageCut(String sourceFile, int xNum, int yNum, long quality, String outputFile)</div>
<div>  {</div>
<div>    try</div>
<div>    {</div>
<div>      long imageQuality            =  quality;</div>
<div>      Bitmap sourceImage            =  new Bitmap(sourceFile);</div>
<div>      ImageCodecInfo myImageCodecInfo     =  GetEncoderInfo("image/jpeg");</div>
<div>      Encoder myEncoder            =  Encoder.Quality;</div>
<div>      EncoderParameters myEncoderParameters  =  new EncoderParameters(1);</div>
<div>      EncoderParameter myEncoderParameter   =  new EncoderParameter(myEncoder, imageQuality);</div>
<div>      myEncoderParameters.Param[0]       =  myEncoderParameter;</div>
<div>      float xWidth               =  sourceImage.Width / xNum;</div>
<div>      float yWidth               =  sourceImage.Height / yNum;</div>
<div>      String outputImage            =  "";</div>
<div>     </div>
<div>      for (int countY = 0; countY < yNum; countY++)</div>
<div>        for (int countX = 0; countX < xNum; countX++)</div>
<div>        {</div>
<div></div>
<div>          RectangleF cloneRect       =  new RectangleF(countX * xWidth, countY * yWidth, xWidth, yWidth);</div>
<div>          Bitmap newImage         =  sourceImage.Clone(cloneRect, PixelFormat.Format24bppRgb);</div>
<div>          outputImage           =  outputFile + countX + countY + ".jpg";</div>
<div>          newImage.Save(outputImage, myImageCodecInfo, myEncoderParameters);</div>
<div></div>
<div>        }
<div>      return true;</div>
<div>    }
<div>    catch</div>
<div>    {</div>
<div>      return false;</div>
<div>    }
<div></div>
<div>  }
<div>  #endregion imageCut</div>
<div></div>
<div>  #region imageCompress</div>
<div>  /// <summary></div>
<div>  /// 图片压缩函数</div>
<div>  /// </summary></div>
<div>  /// <param name="sourceFile">原始图片文件</param></div>
<div>  /// <param name="quality">质量压缩比</param></div>
<div>  /// <param name="ouputFile">输出文件名,请用 .jpg 后缀 </param></div>
<div>  /// <returns>成功返回true，失败则返回false</returns></div>
<div>  public static bool imageCompress(String sourceFile,long quality,String outputFile)</div>
<div>  {</div>
<div>    try</div>
<div>    {</div>
<div>      long imageQuality           =  quality;</div>
<div>      Bitmap sourceImage           =  new Bitmap(sourceFile);</div>
<div>      ImageCodecInfo myImageCodecInfo    =  GetEncoderInfo("image/jpeg");</div>
<div>      Encoder myEncoder           =  Encoder.Quality;</div>
<div>      EncoderParameters myEncoderParameters =  new EncoderParameters(1);</div>
<div>      EncoderParameter myEncoderParameter  =  new EncoderParameter(myEncoder, imageQuality);</div>
<div>      myEncoderParameters.Param[0]      =  myEncoderParameter;</div>
<div>     </div>
<div>      sourceImage.Save(outputFile, myImageCodecInfo, myEncoderParameters);</div>
<div>      return true;</div>
<div></div>
<div>    }
<div>    catch</div>
<div>    {</div>
<div>      return false;</div>
<div>    }
<div></div>
<div>  }
<div>  #endregion imageCompress</div>
<div></div>
<div>  #region getThumImage</div>
<div>  /// <summary></div>
<div>  /// 生成缩略图</div>
<div>  /// </summary></div>
<div>  /// <param name="sourceFile">原始图片文件</param></div>
<div>  /// <param name="quality">质量压缩比</param></div>
<div>  /// <param name="multiple">收缩倍数</param></div>
<div>  /// <param name="outputFile">输出文件名</param></div>
<div>  /// <returns>成功返回true,失败则返回false</returns></div>
<div>  public static bool getThumImage(String sourceFile, long quality, int multiple, String outputFile)</div>
<div>  {</div>
<div>    try</div>
<div>    {</div>
<div>      long imageQuality           =  quality;</div>
<div>      Bitmap sourceImage           =  new Bitmap(sourceFile);</div>
<div>      ImageCodecInfo myImageCodecInfo    =  GetEncoderInfo("image/jpeg");</div>
<div>      Encoder myEncoder           =  Encoder.Quality;</div>
<div>      EncoderParameters myEncoderParameters =  new EncoderParameters(1);</div>
<div>      EncoderParameter myEncoderParameter  =  new EncoderParameter(myEncoder, imageQuality);</div>
<div>      myEncoderParameters.Param[0]      =  myEncoderParameter;</div>
<div>      float xWidth              =  sourceImage.Width;</div>
<div>      float yWidth              =  sourceImage.Height;</div>
<div>      Bitmap newImage            =  new Bitmap((int)(xWidth /multiple), (int)(yWidth /multiple));</div>
<div>      Graphics g               =  Graphics.FromImage(newImage);</div>
<div>     </div>
<div>      g.DrawImage(sourceImage, 0, 0, xWidth / multiple, yWidth / multiple);</div>
<div>      g.Dispose();</div>
<div>      newImage.Save(outputFile,myImageCodecInfo,myEncoderParameters);</div>
<div>      return true;</div>
<div>    }
<div>    catch</div>
<div>    {</div>
<div>      return false;</div>
<div>    }
<div>  }
<div>  #endregion getThumImage</div>
<div></div>
<div>  #region ImageCodecInfo</div>
<div>  /// <summary></div>
<div>  /// 获取图片编码信息</div>
<div>  /// </summary></div>
<div>  private static ImageCodecInfo GetEncoderInfo(String mimeType)</div>
<div>  {</div>
<div>    int j;</div>
<div>    ImageCodecInfo[] encoders;</div>
<div>    encoders = ImageCodecInfo.GetImageEncoders();</div>
<div>    for (j = 0; j < encoders.Length; ++j)</div>
<div>    {</div>
<div>      if (encoders[j].MimeType == mimeType)</div>
<div>        return encoders[j];</div>
<div>    }
<div>    return null;</div>
<div>  }
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　图片切割　
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