/// <summary>
  /// 上传文件--返回保存的文件名
  /// </summary>
  private string UpFile()
  {
   //FileUpload为Html的文件上传控件
   HttpPostedFile hpf=FileUpload.PostedFile;
   char[] sep={'\\'};
   string[] AFileName=hpf.FileName.Split(sep);
   string GetFileName=AFileName[AFileName.Length-1];

   string ServerPath=Server.MapPath(@".\UpFiles\");
   if(!Directory.Exists(ServerPath))
   {
    Directory.CreateDirectory(ServerPath);
   }

   string RFileName=DateTime.Now.ToString("yyyyMMddHHmmss")+GetFileName;
   string path=ServerPath+RFileName;
   hpf.SaveAs(path);

   return RFileName;
  }