public JsonResult Alterar(ClienteModel model) { BoCliente bo = new BoCliente(); if (!this.ModelState.IsValid) { List <string> erros = (from item in ModelState.Values from error in item.Errors select error.ErrorMessage).ToList(); Response.StatusCode = 400; return(Json(string.Join(Environment.NewLine, erros))); } else if (bo.VerificarExistenciaParaAlterar(model.Id, String.Join("", Regex.Split(model.Cpf, @"[^\d]")))) { Response.StatusCode = 400; return(Json("Cpf já cadastrado!")); } else { bo.Alterar(model.Converter()); return(Json("Cadastro alterado com sucesso")); } }