图片缩放代码,CSharp代码库,德仔网

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代码分类
【CSharp】图片缩放
作者:dezai / 发布于2014/3/11/ 516
/// <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

 ///http://www.xuehai.net

 /// </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;
 }
 }
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