//************************************************************//
//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
//************************************************************//
///

/// 缩小图片
///

/// 源图文件名(包括路径)/// 缩小后保存为文件名(包括路径)/// 缩小至宽度/// 缩小至高度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;
}
}

///

/// 按比例缩小图片,自动计算高度
///

/// 源图文件名(包括路径)/// 缩小后保存为文件名(包括路径)/// 缩小至宽度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;
}
}

///

/// 按比例缩小图片,自动计算宽度
///

/// 源图文件名(包括路径)/// 缩小后保存为文件名(包括路径)/// 缩小至高度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;
}
}