使用.net 4.0任务模式，使用HTTPClient . readasasync将JSON反序列化为数组或列表

我正在尝试使用。net 4.0任务模式反序列化从http://api.usa.gov/jobs/search.json?query=nursing+jobs返回的JSON。它返回这个JSON ('Load JSON data' @ http://jsonviewer.stack.hu/)。

[
  {
    "id": "usajobs:353400300",
    "position_title": "Nurse",
    "organization_name": "Indian Health Service",
    "rate_interval_code": "PA",
    "minimum": 42492,
    "maximum": 61171,
    "start_date": "2013-10-01",
    "end_date": "2014-09-30",
    "locations": [
      "Gallup, NM"
    ],
    "url": "https://www.usajobs.gov/GetJob/ViewDetails/353400300"
  },
  {
    "id": "usajobs:359509200",
    "position_title": "Nurse",
    "organization_name": "Indian Health Service",
    "rate_interval_code": "PA",
    "minimum": 42913,
    "maximum": 61775,
    "start_date": "2014-01-16",
    "end_date": "2014-12-31",
    "locations": [
      "Gallup, NM"
    ],
    "url": "https://www.usajobs.gov/GetJob/ViewDetails/359509200"
  },
  ...
]

指数行动:

  public class HomeController : Controller
  {
    public ActionResult Index()
    {
      Jobs model = null;
      var client = new HttpClient();
      var task = client.GetAsync("http://api.usa.gov/jobs/search.json?query=nursing+jobs")
        .ContinueWith((taskwithresponse) =>
        {
          var response = taskwithresponse.Result;
          var jsonTask = response.Content.ReadAsAsync<Jobs>();
          jsonTask.Wait();
          model = jsonTask.Result;
        });
      task.Wait();
      ...
     }

Job和Job类:

  [JsonArray]
  public class Jobs { public List<Job> JSON; }
  public class Job
  {
    [JsonProperty("organization_name")]
    public string Organization { get; set; }
    [JsonProperty("position_title")]
    public string Title { get; set; }
  }

当我在jsonTask.Wait();上设置断点并检查jsonTask时，状态为指责。InnerException是"类型ProjectName"。乔布斯不是一个集合。"

我开始使用Jobs类型，没有JsonArray属性和Jobs作为数组(Job[])，并得到此错误。

  public class Jobs { public Job[] JSON; }
    +       InnerException  {"Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'ProjectName.Models.Jobs' because the type requires a JSON object (e.g. {'"name'":'"value'"}) to deserialize correctly.'r'n
    To fix this error either change the JSON to a JSON object (e.g. {'"name'":'"value'"}) or change the deserialized type to an array or a type that implements a collection interface
 (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.'r'n
Path '', line 1, position 1."}  System.Exception {Newtonsoft.Json.JsonSerializationException}

我将如何处理这个网站的JSON与。net 4.0任务模式?我希望在进入。net 4.5的await async模式之前让它工作。

回答更新:

下面是一个使用。net 4.5 async await模式和brumScouse的答案的例子。

 public async Task<ActionResult>Index()
 {
    List<Job> model = null;
    var client = newHttpClient();
    // .NET 4.5 async await pattern
    var task = await client.GetAsync(http://api.usa.gov/jobs/search.json?query=nursing+jobs);
    var jsonString = await task.Content.ReadAsStringAsync();
    model = JsonConvert.DeserializeObject<List<Job>>(jsonString);
    returnView(model);
 }

您需要引入System.Threading.Tasks命名空间。
注意:在.Content上没有可用的.ReadAsString方法，这就是为什么我使用.ReadAsStringAsync方法。