using System.Collections.Generic;

using System.Linq;

using System.Web.Mvc;

namespace MvcSample.Extensions

{

    public static class ModelStateExtensions

    {

        private static string GetErrorMessage(ModelError error, ModelState modelState)

        {

            if (!string.IsNullOrEmpty(error.ErrorMessage))

            {

                return error.ErrorMessage;

            }

            if (modelState.Value == null)

            {

                return error.ErrorMessage;

            }

            var args = new object[] { modelState.Value.AttemptedValue };

            return string.Format("属性的值不合法=值 '{0}' 非法！", args);

        }

        public static object SerializeErrors(this ModelStateDictionary modelState)

        {

            return modelState.Where(entry => entry.Value.Errors.Any())

                .ToDictionary(entry => entry.Key, entry => SerializeModelState(entry.Value));

        }

        private static Dictionary<string, object> SerializeModelState(ModelState modelState)

        {

            var dictionary = new Dictionary<string, object>();

            dictionary["errors"] = modelState.Errors.Select(x => GetErrorMessage(x, modelState)).ToArray();

            return dictionary;

        }

        public static object ToDataSourceResult(this ModelStateDictionary modelState)

        {

            if (!modelState.IsValid)

            {

                return modelState.SerializeErrors();

            }

            return null;

        }

    }

}

        [HttpPost]

        public ActionResult ModifyProduct(ProductInfoModifyViewModel viewModel,

            [ModelBinder(typeof(CommaSeparatedModelBinder))] List<int> orderStatusIds = null)

        {

            if (!ModelState.IsValid)

            {

                return Json(new DataSourceResult { Errors = ModelState.SerializeErrors() });

            }

            ProductInfoService.TryModifyById(viewModel.ProductId, viewModel.NewYear);

            return Json(new { Success = true, Message = "保存成功" });

        }

    public class DataSourceResult

    {

        public object ExtraData { get; set; }

        public IEnumerable Data { get; set; }

        public object Errors { get; set; }

        public int Total { get; set; }

    }

        jQuery.ajax({

            type: "POST",

            url: "@Url.Action("ModifyProduct")",

            //data: { productId: productId, newYear: nowValue, orderStatusIds: "1,2,3,4", ProductName: " abc d e " }, //

            data: { productId: , ProductName: "" }, //

            success: function (data) {

                alert(data.Message);

                jObj.attr("old-value", nowValue);

            },

            error: function (xmlHttpRequest, textStatus, errorThrown) {

                alert(textStatus);

            }

        });

using MvcSample.Extensions;

using System;

using System.Collections.Generic;

using System.ComponentModel.DataAnnotations;

using System.Linq;

using System.Web;

namespace MvcSample.Models

{

    public class ProductInfoModifyViewModel : BaseSkyViewModel

    {

        [Required]

        [Range(, int.MaxValue, ErrorMessage = "产品 ID 必须大于 0")]

        public int ProductId { get; set; }

        /// <summary>

        /// 假设有一个这个 Property

        /// </summary>

        [Display(Name = "产品名称")]

        [Required(ErrorMessage = "{0}不能为空！")]

        [StringLength(, MinimumLength = , ErrorMessage = "{0}的长度必须在 {2} 和 {1} 之间")] //产品名称的长度必须在 1 和 30 之间

        public string ProductName { get; set; }

        public int NewYear { get; set; }

    }

}

{

    "ExtraData": null,

    "Data": null,

    "Errors": {

        "ProductId": {

            "errors": ["产品 ID 必须大于 0"]

        },

        "ProductName": {

            "errors": ["产品名称不能为空！"]

        }

    },

    "Total":

}