使用jQuery异步传递Model到控制器方法,并异步返回错误信息

    public class Person

    {

        public string Name { get; set; }

        public int Age { get; set; } 

    }

    public class PersonVm

    {

        public string Message { get; set; } 

    }

      public ActionResult Demo()

        {

            return View();

        }

        [HttpPost]

        public ActionResult SavePerson(Person person)

        {

            if (ModelState.IsValid)

            {

                string message = string.Format("用户姓名:{0},年龄：{1}", person.Name, person.Age);

                return Json(new PersonVm() {Message = message});

            }

            else

            {

                string errorMessage = "<div class=\"validation-summary-errors\">发生以下错误：<ul>";

                foreach (var key in ModelState.Keys)

                {

                    var error = ModelState[key].Errors.FirstOrDefault();

                    if (error != null)

                    {

                        errorMessage += "<li class=\"field-validation-error\">"+error.ErrorMessage+"</li>";

                    }

                }

                errorMessage += "</ul>";

                return Json(new PersonVm() {Message = errorMessage});

            }

        }    

@model MvcApplication1.Models.Person

@{

    ViewBag.Title = "Demo";

    Layout = "~/Views/Shared/_Layout.cshtml";

}

@Html.EditorForModel()

<input type="submit" value="保存" id="personCreate"/>

<div>

    <span id="resultMessage"></span>

</div>

@section scripts

{

    <script src="~/Scripts/json.js"></script>

    <script type="text/javascript">

        $(function() {

            $(‘#personCreate‘).click(function() {

                var person = getPerson();

                if (person == null) {

                    alert("用户名不能为空");

                    return;

                }

                var json = $.toJSON(person);

                $.ajax({

                    url: ‘@Url.Action("SavePerson","Home")‘,

                    type: ‘POST‘,

                    dataType: ‘json‘,

                    data: json,

                    contentType: ‘application/json; charset=utf-8‘,

                    success: function(data) {

                        var message = data.Message;

                        $("#resultMessage").html(message);

                    }

                });

            });

        });

        function getPerson() {

            var name = $(‘#Name‘).val();

            var age = $(‘#Age‘).val();

            return (name == "") ? null : { Name: name, Age: age };

        }

    </script>

}