//************************************************************//
//下面给出三个简单的方法,后面两个方法是扩展,估计有时用得着
//************************************************************//
  /// <summary>
  /// 缩小图片
  /// </summary>
  /// <param name="strOldPic">源图文件名(包括路径)</param>
  /// <param name="strNewPic">缩小后保存为文件名(包括路径)</param>
  /// <param name="intWidth">缩小至宽度</param>
  /// <param name="intHeight">缩小至高度</param>
  public void SmallPic(string strOldPic, string strNewPic, int intWidth, int intHeight)
  {

   System.Drawing.Bitmap objPic,objNewPic;
   try
   {
    objPic = new System.Drawing.Bitmap(strOldPic);
    objNewPic=new System.Drawing.Bitmap(objPic,intWidth,intHeight);
    objNewPic.Save(strNewPic);

   }
   catch(Exception exp){throw exp;}
   finally
   {
    objPic=null;
    objNewPic=null;
   }
  }

  /// <summary>
  /// 按比例缩小图片,自动计算高度
  /// </summary>
  /// <param name="strOldPic">源图文件名(包括路径)</param>
  /// <param name="strNewPic">缩小后保存为文件名(包括路径)</param>
  /// <param name="intWidth">缩小至宽度</param>
  public void SmallPic(string strOldPic, string strNewPic, int intWidth)
  {

   System.Drawing.Bitmap objPic,objNewPic;
   try
   {
    objPic = new System.Drawing.Bitmap(strOldPic);
    int intHeight=(intWidth / objPic.Width) * objPic.Height;
    objNewPic=new System.Drawing.Bitmap(objPic,intWidth,intHeight);
    objNewPic.Save(strNewPic);

   }
   catch(Exception exp){throw exp;}
   finally
   {
    objPic=null;
    objNewPic=null;
   }
  }


  /// <summary>
  /// 按比例缩小图片,自动计算宽度
  /// </summary>
  /// <param name="strOldPic">源图文件名(包括路径)</param>
  /// <param name="strNewPic">缩小后保存为文件名(包括路径)</param>
  /// <param name="intHeight">缩小至高度</param>
  public void SmallPic(string strOldPic, string strNewPic, int intHeight)
  {

   System.Drawing.Bitmap objPic,objNewPic;
   try
   {
    objPic = new System.Drawing.Bitmap(strOldPic);
    int intWidth=(intHeight / objPic.Height) * objPic.Width;
    objNewPic=new System.Drawing.Bitmap(objPic,intWidth,intHeight);
    objNewPic.Save(strNewPic);

   }
   catch(Exception exp){throw exp;}
   finally
   {
    objPic=null;
    objNewPic=null;
   }
  }

posted on 2010-01-06 14:43  冷火  阅读(741)  评论(1编辑  收藏  举报