c# - 在 Windows Phone 8 中解析复杂的 JSON 对象(字典键/值对)

Question

我是 windows phone 8 开发的新手...如何在 windows phone 8 中解析以下数据:

   [
   {
      "detail":{
         "single_selection":[
            {
               "Questions":"If  -2<1\/2x< 4 ,  then",
               "Question Type":"text",
               "Url":"NO URL",
               "options":{
                  "2379":"4 > x < -8",
                  "2380":"4 < x > -8",
                  "2381":"4 < x < -8",
                  "2382":"4 > x > -8"
               },
               "correct Ans":[
                  "2382"
               ],
               "marks":"1",
               "description":"4 > x > -8"
            }
         ]
      }
   }
]

我正在尝试以下列方式解析它:

 namespace TestSample
{
    public partial class MainPage : PhoneApplicationPage
    {
        private const string Con_String = @"isostore:/DataBase.sdf";
        // Constructor
        public MainPage()
        {
            InitializeComponent();
            Loaded += new RoutedEventHandler(MainPage_Loaded);         


        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            WebClient webClient = new WebClient();
            webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClient_DownloadStringCompleted);
            webClient.DownloadStringAsync(new Uri("SomeURL"));
        }

        public void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
        {
            var rootObject = JsonConvert.DeserializeObject<RootObject1[]>(e.Result);

            foreach (var r in rootObject)
            {
                var s = r.detail.single_selection;
                for (int i = 0; i < s.Count; i++)
                {


                }
            }






        }


        public class RootObject1
        {
            public Detail detail { get; set; }
            [JsonProperty("total questions and marks")]
            public List<TotalQuestionsAndMark> totalquestionsandmarks { get; set; }
        }

        public class TotalQuestionsAndMark
        {
            [JsonProperty("total questions")]
            public int totalquestions { get; set; }
            [JsonProperty("total test marks")]
            public int totaltestmarks { get; set; }
            public string Duration { get; set; }
        }

        public class Detail
        {
            public List<SingleSelection> single_selection { get; set; }            
        }

        public class SingleSelection
        {
            public string Questions { get; set; }
            [JsonProperty("Question Type")]
            public string QuestionType { get; set; }
            public string Url { get; set; }
            public string marks { get; set; }
            public string description { get; set; }
            public Options option { get; set; }
            [JsonProperty("correct Ans")]
            public List<string> correctAns { get; set; }
        }

        public class Options
        {


            public string optionid { get; set; }
            public string option_name { get; set; }


        }
    }
}

我能够解析一些数据，但我不知道如何解析选项。请帮我解析完整的代码。请帮我解析完整的数据……提前谢谢……

Answer 1

您的代码存在的问题是您试图将键值对字典解析为对象项数组。

这是不可能的，因为解析引擎会认为 optionid 和 option_name 都是选项列表中每个对象项的属性。如果我们假设这些是属性，则属性必须有一个常量名称，而在您的 json 中不是这种情况。

唯一可能的解析方法是使用字符串/字符串的键值对字典。你的代码必须是这样的，你应该删除选项类。

    [JsonProperty(PropertyName = "options")]
    public Dictionary<string, string> Options { get; set; }