传递给asp.net mvc JsonResult动作的javascript对象属性始终为null

Question

我一直试图将对象数组传递给在Controller类上创建的JsonResult操作方法，我尝试了来自不同答案的所有可能解决方案，但无济于事。 这是我的js函数：

function CalculateCost() {
var distancecost = [];
//prepare the List<DistanceCost> object
for (i = 0; i < _SELECTED_POINTS.length; i++) {
    console.log('point::' + _SELECTED_POINTS[i]);
    let dist = {
        PlaceId: _SELECTED_POINTS[i].place_id,
        PointSequence: _SELECTED_POINTS[i].PointSequence,
        controlId: _SELECTED_POINTS[i].controlId,
        FromLatitude: (i == (_SELECTED_POINTS.length - 1)) ? _SELECTED_POINTS[0].geometry.location.lat() : _SELECTED_POINTS[i].geometry.location.lat(),
        FromLongitude: (i == (_SELECTED_POINTS.length - 1)) ? _SELECTED_POINTS[0].geometry.location.lng() : _SELECTED_POINTS[i].geometry.location.lng(),
        ToLatitude: _SELECTED_POINTS[i].geometry.location.lat(),
        ToLongitude: _SELECTED_POINTS[i].geometry.location.lng(),
        DistanceType: 'Mile',
        DistanceCalculateType: (i == (_SELECTED_POINTS.length - 1)) ? 'TotalDistance' : 'PickDrop',
        TotalPrice: '0',
        TotalDistance: '0'
    };

    console.log(dist);
    distancecost.push({
        dist
    });
}

$.ajax({
    method: 'GET',
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    url: '/Dashboard/CalculateDistanceAndPrice',
    data: JSON.parse(JSON.stringify({ 'distanceCost': distancecost })),
    success: function (response) {
        console.log('DistanceCalculation Response:: ' + JSON.stringify(response));
    },
    error: function (response) {
        console.log(response);
    }
});

}

这是Jsonresult操作方法：

编辑： 正如尼古拉斯建议的那样，我更改了类型，但仍然无法正常工作，在插入任何数据时使用了AFAIK POST，在更新任何数据时使用了PUT，但是这里我只是通过计算每个点之间的距离来获取数据：

$.ajax({
    method: 'POST',
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    url: '/Dashboard/CalculateDistanceAndPrice',
    data: JSON.stringify({ 'distanceCost': distancecost }),
    success: function (response) {
        console.log('DistanceCalculation Response:: ' + JSON.stringify(response));
    },
    error: function (response) {
        console.log(response);
    }
});

编辑： 我更改了对象的创建，但仍然没有运气：

var DistanceCost = new Object();
    DistanceCost.PlaceId = _SELECTED_POINTS[i].place_id;
    DistanceCost.PointSequence = _SELECTED_POINTS[i].PointSequence;
    DistanceCost.controlId = "";//_SELECTED_POINTS[i].controlId,
    DistanceCost.FromLatitude = (i == (_SELECTED_POINTS.length - 1)) ? _SELECTED_POINTS[0].geometry.location.lat() : _SELECTED_POINTS[i].geometry.location.lat();
    DistanceCost.FromLongitude = (i == (_SELECTED_POINTS.length - 1)) ? _SELECTED_POINTS[0].geometry.location.lng() : _SELECTED_POINTS[i].geometry.location.lng();
    DistanceCost.ToLatitude = _SELECTED_POINTS[i].geometry.location.lat();
    DistanceCost.ToLongitude = _SELECTED_POINTS[i].geometry.location.lng();
    DistanceCost.DistanceType = 'Mile';
    DistanceCost.DistanceCalculateType = (i == (_SELECTED_POINTS.length - 1)) ? 'TotalDistance' : 'PickDrop';
    DistanceCost.TotalPrice = '0';
    DistanceCost.TotalDistance = '0';

Answer 1

尝试删除distanceCost的报价  +> data: JSON.parse(JSON.stringify({ distanceCost: distancecost }))