.net 文件下载的编写

/**////<summary>
///
///</summary>
///<paramname="path">文件的绝对路径</param>
///<paramname="code">文件的编码</param>
///<returns>是否成功</returns>
publicboolDown(stringpath,stringcode)
...{
boolsucc=false;

try
...{
stringfilename=path.Substring(path.LastIndexOf("\")+1);
HttpResponseres=HttpContext.Current.Response;
res.AppendHeader("Content-Disposition","attachment;filename="+filename);
res.ContentEncoding=System.Text.Encoding.GetEncoding(code);
res.ContentType="application/octet-stream";
res.Clear();
res.WriteFile(path);
res.End();
succ=true;
}
catch
...{
succ=false;
}


returnsucc;
}