MVC3 Json模型绑定在发送到服务器时不起作用

Question

我对MVC3和模型绑定有一个奇怪的问题.当我将JSON对象发布到我的控制器时,模型绑定器根本无法创建一个类型化的对象.所有属性都是默认属性(即空字符串)

但是,如果我在服务器上创建实例,并将其作为JSON操作结果发送,则线上的数据看起来相同.

我试过了

$.ajaxSettings.traditional = true;

它没有任何区别

作为一个例子,如果我发布

{"RoutineName":"My new routine","Routines":[{"DayName":"Monday","Items":[21,31]}]}

模型绑定器失败,但来自服务器的数据看起来像

{"RoutineName":"Routine From Code","Routines":[{"DayName":"Monday","Items":[1,2]},{"DayName":"Tuesday","Items":[]}]}

用于生成此内容的html看起来像

$('#submitRoutine').click(function () {
            var routines = [];
            $('.DayName').each(function (index, item) {
                var $item = $(item);
                var name = $item.html();
                var routineItems = [];
                $($item.attr('href')).find('.itemId').each(function () {
                    routineItems.push(parseInt($(this).val(), 10));
                });
                routines.push({
                    DayName: name,
                    Items: routineItems
                });
            });
            var routine = {
                RoutineName: $('#routineName').val(),
                Routines: routines
            };

            $.ajaxSettings.traditional = true;
            $.post('/Machine/CreateRoutine', JSON.stringify(routine),function (data) {},'json');
        });

所以看起来从类型化对象到JSON的模型绑定是可以的,但是以另一种方式返回则不行.有没有我错过的东西？

模型在F#中

type RoutineDayViewModel() =
    let mutable _name = String.Empty
    let mutable _items = new ResizeArray<int>()

    member x.DayName with get() = _name and set value = _name <- value
    member x.Items with get() = _items and set value = _items <- value

type RoutineViewModel() =
    let mutable _name = String.Empty
    let mutable _routines = new ResizeArray<RoutineDayViewModel>()

    member x.RoutineName with get() = _name and set value = _name <- value
    member x.Routines with get() = _routines and set value = _routines <- value

编辑:我也试过以下C#类并得到相同的结果

 public class RoutineDayViewModel
    {
        public string DayName { get; set; }
        public List<int> Items{ get; set; }
    }

    public class RoutineViewModel
    {
        public string RoutineName { get; set; }
        public List<RoutineDayViewModel> Routines { get; set; }
    }

我还在global.asax中添加了以下内容

ValueProviderFactories.Factories.Add(new JsonValueProviderFactory())

谢谢

Answer 1

application/json如果您打算发送JSON格式的请求,则需要将请求内容类型设置为您正在使用该JSON.stringify方法执行的操作.所以代替:

$.post('/Machine/CreateRoutine', JSON.stringify(routine),function (data) {},'json');

你可以使用:

$.ajax({
    url: '/Machine/CreateRoutine',
    type: 'POST',
    contentType: 'application/json; charset=utf-8',
    data: JSON.stringify(routine),
    success: function (data) {

    } 
});

有了这个,您不需要设置$.ajaxSettings.traditional也不应该JsonValueProviderFactory在Global.asax中添加任何内容,因为ASP.NET MVC 3中默认添加了此提供程序.