public string Registration(string phoneNumber, string password, string securityNumber, string userName) { IMeiWei.BLL.user bll_user = new IMeiWei.BLL.user(); IMeiWei.Model.user model_user = new IMeiWei.Model.user(); List <IMeiWei.Model.user> old_model_users = new List <IMeiWei.Model.user>(); old_model_users = bll_user.GetModelList(" phoneNumber = '" + phoneNumber + "'"); if (null != old_model_users && old_model_users.Count > 0) { return("DUPLICATE"); } model_user.IsActive = false; model_user.Password = password; model_user.SecurityCode = securityNumber; model_user.UserName = userName; model_user.UserStatusId = 1; model_user.PhoneNumber = phoneNumber; bll_user.Add(model_user); return("SUCCESS"); }