public JsonResult UpdateRate()
        {
            try
            {
                cn.com.webxml.webservice.ForexRmbRateWebService server = new cn.com.webxml.webservice.ForexRmbRateWebService();
                DataSet ds = server.getForexRmbRate();


                foreach (DataRow dr in ds.Tables[0].Rows)
                {
                    CurrencyType c = new CurrencyType();
                    c.CurrencyCode = dr["Symbol"].ToString();
                    c.CurrencyName = dr["Name"].ToString();
                    NSession.Delete(" from CurrencyType where CurrencyCode='" + c.CurrencyCode + "'");
                    NSession.Flush();
                    c.CurrencySign = "";
                    string str = dr["fBuyPrice"].ToString();
                    if (string.IsNullOrEmpty(str))
                    {
                        str = "0";
                    }
                    c.CurrencyValue = Math.Round(Convert.ToDecimal(str) / 100, 5);
                    c.CreateOn = DateTime.Now; ;
                    NSession.Save(c);
                }
            }
            catch (Exception ee)
            {
                return Json(new { IsSuccess = false, ErrorMsg = "出错了" });
            }
            return Json(new { IsSuccess = true });
        }
 public JsonResult Create(CurrencyType obj)
 {
     try
     {
         NSession.SaveOrUpdate(obj);
         NSession.Flush();
     }
     catch (Exception ee)
     {
         return Json(new { IsSuccess = false, ErrorMsg = "出错了" });
     }
     return Json(new { IsSuccess = true });
 }