ModeState验证

 public static class MVCHellper
    {
        public static string GetErrors(ModelStateDictionary ms)
        {
            System.Text.StringBuilder sbtext = new System.Text.StringBuilder();
            foreach (var item in ms.Keys)
            {
                if (ms[item].Errors.Count <= 0)
                { continue; }
                sbtext.Append("错误消息为：");
                foreach (var itemerror in ms[item].Errors)
                {
                    sbtext.Append(itemerror.ErrorMessage + "<br/>");
                }

            }
            return sbtext.ToString();

        }
    }