public ActionResult CheckEmailIsAvailable(string email)
        {
            Regex reg       = new Regex(@"^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})");
            bool  available = true;

            if (!reg.IsMatch(email))
            {
                available = false;
            }
            else if (BLLEnterprise.GetEnterpriseByEmailOnly(email) != null)
            {
                available = false;
            }


            if (available)
            {
                Response.Write("Yes");
            }
            else
            {
                Response.Write("No");
            }

            Response.Flush();
            Response.End();

            return(null);
        }
        public ActionResult Register(string enterpriseName, string enterpriseEmail, string password, string enterpriseAddress, string enterpriseTel)
        {
            if (!string.IsNullOrEmpty(enterpriseName) &&
                !string.IsNullOrEmpty(enterpriseEmail)  &&
                !string.IsNullOrEmpty(password)  &&
                !string.IsNullOrEmpty(enterpriseAddress)  &&
                !string.IsNullOrEmpty(enterpriseTel) &&
                BLLEnterprise.GetEnterpriseByEmailOnly(enterpriseEmail) == null)
            {
                bool isSuccess = BLLEnterprise.RegisterEnterprise(enterpriseName, enterpriseEmail, password, enterpriseAddress, enterpriseTel);

                if (isSuccess)
                {
                    //发送邮件,等待审核
                    EmailHelper.SendMail(enterpriseEmail, "企业信息管理系统激活", "请激活");

                    Response.Write("Success");
                    Response.Flush();
                    Response.End();
                }
                else
                {
                    Response.Write("Fail");
                }
            }

            return(View());
        }