.net常用下载文件代码

private void downLoad(string filenamed) { string path = Server.MapPath("attPath/") + filenamed; FileInfo fi = new FileInfo(path); if (fi.Exists) { Response.Clear(); Response.AddHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(filenamed)); Response.AddHeader("Content-Length", fi.Length.ToString()); Response.ContentType = "application/octet-stream;charset=gb2321"; Response.WriteFile(fi.FullName); Response.Flush(); Response.Close(); Response.End(); } }