如何在Asp.Net MVC中序列化后返回Json数组

Question

我有一个Action，我使用它来使用GeoJson返回GeoJson.Net数据。行动方法如下：

public ActionResult GetWorldGeometry()
{
    var worldgeo = (from w in _bdEntities.worlds1 select w);
    foreach (var w in  worldgeo )
    {
        var world = SqlGeometry.STGeomFromText(new SqlChars(w.geom.AsText()), 4326);
        var worldGeometry = world.ToGeoJSONGeometry();
        var worldFeatureProperties = new Dictionary<string, object>
        {
            {"Name", w.NAME},
            {"Population(05)", w.POP2005},
            {"Region", w.REGION},
            {"ISO2", w.ISO2},
            {"ISO3", w.ISO3},
            {"Area", w.AREA}
        };
        var feature = new Feature(worldGeometry, worldFeatureProperties);

        var serializedData = JsonConvert.SerializeObject(feature, Formatting.Indented,
            new JsonSerializerSettings
            {
                ContractResolver = new CamelCasePropertyNamesContractResolver(),
                NullValueHandling = NullValueHandling.Ignore
            });

        return Content(serializedData, "application/json");
    } 
    return null;
}

在我看来，我想将这个GeoJson绘制成传单或OpenLayers，但是我目前正在使用下面的代码测试Action方法的输出：

        <div>
           <p>
             <span id="add_here"></span>
           </p>
         </div>

         @section scripts
           {
            <script>
              $.ajax({
                  url: '@Url.Action("GetJsonResult", "Home")',
                  dataType: "json", 
                  type: "GET", 
                  contentType: 'application/json; charset=utf-8',
                  cache: false, 
                  data: {}, 
                  traditional: true,
                  success: function(data) {
                  var reslen = data.length;
                  alert(reslen);
                  var result = JSON.stringify(data);
                  alert(result);
                  $('#add_here').text(result);
                       },
                  error: function(xhr) {
                  alert('error');
                       }
                    });
                </script>
               }

我没有得到一个数据数组，而是得到了第一个警告结果长度的result.On，它写着“未定义”。在我的视图中，如何获得由Action方法中的查询返回的所有数据？下面是返回的单个结果的片段和警告消息：输出结果

Answer 1

这是你什么，我希望它会成功，没有测试出来。

    public class WorldFeatureProperties
    {
        public string Name { get; set; }
        public string Population05 { get; set; }
        public string Region { get; set; }
        public string ISO2 { get; set; }
        public string ISO3 { get; set; }
        public string Area { get; set; }
        public string WorldGeometry { get; set; }
    }


    public ActionResult GetWorldGeometry()
    {
        var worldgeo = (from w in _bdEntities.worlds1 select w);

        var retval = new List<WorldFeatureProperties>();



        foreach (var w in worldgeo)
        {

            var currentLocation = JsonConvert.DeserializeObject<WorldFeatureProperties>(w);

            currentLocation.WorldGeometry = WorldGeometry.STGeomFromText(new SqlChars(w.geom.AsText()), 4326).ToGeoJSONGeometry();

            retval.Add(currentLocation);
       }

        var serializedData = JsonConvert.SerializeObject(retval, Formatting.Indented,
              new JsonSerializerSettings
              {
                  ContractResolver = new CamelCasePropertyNamesContractResolver(),
                  NullValueHandling = NullValueHandling.Ignore
              });
        return Json(serializedData, JsonRequestBehavior.AllowGet);

    }