/// <summary>

/// 普通下载

/// </summary>

/// <param name="FileName">文件虚拟路径</param>

public static void DownLoadold(string FileName)

{

    string destFileName = FileName; //MapPathFile(FileName);

    if (File.Exists(destFileName))

    {

        FileInfo fi = new FileInfo(destFileName);

        HttpContext.Current.Response.Clear();

        HttpContext.Current.Response.ClearHeaders();

        HttpContext.Current.Response.Buffer = false;

        HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));

        HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());

        HttpContext.Current.Response.ContentType = "application/octet-stream";

        HttpContext.Current.Response.WriteFile(destFileName);

        HttpContext.Current.Response.Flush();

        HttpContext.Current.Response.End();

    }

}