C# 如何在mvc中使用newtonsoft反序列化嵌套json字符串#

我一直在尝试反序列化嵌套的json。我正在从中获取JSON。我想从JSON中获取

国家id

，并将其值绑定到dropdownlist中

我不确定，怎么了

其他信息 要反序列化的代码

JObject googleSearch = JObject.Parse(googleSearchText);

// get JSON result objects into a list IList<JToken> results =
googleSearch["responseData"]["results"].Children().ToList();

// serialize JSON results into .NET objects IList<SearchResult>
searchResults = new List<SearchResult>(); foreach (JToken result in results) {
// JToken.ToObject is a helper method that uses JsonSerializer internally
SearchResult searchResult = result.ToObject<SearchResult>();
searchResults.Add(searchResult); }

给出下面的代码。这是我的模型：

Using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

    namespace ejemplo.Models
   {
    public class Paginacion
    {
        public Paginacion()
        {
            this.List = new List<Data>();
        }

        [JsonProperty("page")]
        public int Page { get; set; }

        [JsonProperty("pages")]
        public int Pages { get; set; }

        [JsonProperty("per_page")]
        public string PerPage { get; set; }

        [JsonProperty("total")]
        public int Total { get; set; }

        public List<Data> List { get; set; }
    }

    public class Country
    {
        [JsonProperty("id")]
        public string Id { get; set; }

        [JsonProperty("value")]
        public string Value { get; set; }
    }

    public class Indicator
    {
        [JsonProperty("id")]
        public string Id { get; set; }

        [JsonProperty("value")]
        public string Value { get; set; }
    }

public class Data
{
    public Data()
    {
        this.Indicator = new Indicator();
        this.Country = new Country();
    }

    [JsonProperty("indicator")]
    public Indicator Indicator { get; set; }

    [JsonProperty("country")]
    public Country Country { get; set; }

    [JsonProperty("date")]
    public string Date { get; set; }

    [JsonProperty("value")]
    public string Value { get; set; }

    [JsonProperty("decimal")]
    public string Decimal { get; set; }

   }
}

使用Newtonsoft.Json；
使用制度；
使用System.Collections.Generic；
使用System.Linq；
使用System.Web；
名称空间ejempo.Models
{
公共类分页
{
公共页码（）
{
this.List=新列表（）；
}
[JsonProperty（“第页”）]
公共整型页{get；set；}
[JsonProperty（“页面”）]
公共整型页{get；set；}
[JsonProperty（“每页”）]
每个页面的公共字符串{get；set；}
[JsonProperty（“总计”）]
公共整数总计{get；set；}
公共列表{get；set；}
}
公营国家
{
[JsonProperty（“id”）]
公共字符串Id{get；set；}
[JsonProperty（“价值”）]
公共字符串值{get；set；}
}
公共类指标
{
[JsonProperty（“id”）]
公共字符串Id{get；set；}
[JsonProperty（“价值”）]
公共字符串值{get；set；}
}
公共类数据
{
公共数据（）
{
this.Indicator=newindicator（）；
this.Country=新国家（）；
}
[JsonProperty（“指标”）]
公共指示符{get；set；}
[JsonProperty（“国家”）]
公共国家{get；set；}
[JsonProperty（“日期”）]
公共字符串日期{get；set；}
[JsonProperty（“价值”）]
公共字符串值{get；set；}
[JsonProperty（“十进制”）]
公共字符串十进制{get；set；}
}
}

虽然它是有效的json，但序列化程序需要一个根对象，因此如果您可以将json输出修改为根对象，则可以正确序列化它：

[  
    {
       "page": {  
          "page":1,
          "pages":31,
          "per_page":"10",
          "total":304
       },
       "data": [  
          {  
             "id":"ABW",
             "iso2Code":"AW",
             "name":"Aruba",
             "region":{  
                "id":"LCN",
                "iso2code":"ZJ",
                "value":"Latin America & Caribbean "
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"HIC",
                "iso2code":"XD",
                "value":"High income"
             },
             "lendingType":{  
                "id":"LNX",
                "iso2code":"XX",
                "value":"Not classified"
             },
             "capitalCity":"Oranjestad",
             "longitude":"-70.0167",
             "latitude":"12.5167"
          },
          {  
             "id":"AFG",
             "iso2Code":"AF",
             "name":"Afghanistan",
             "region":{  
                "id":"SAS",
                "iso2code":"8S",
                "value":"South Asia"
             },
             "adminregion":{  
                "id":"SAS",
                "iso2code":"8S",
                "value":"South Asia"
             },
             "incomeLevel":{  
                "id":"LIC",
                "iso2code":"XM",
                "value":"Low income"
             },
             "lendingType":{  
                "id":"IDX",
                "iso2code":"XI",
                "value":"IDA"
             },
             "capitalCity":"Kabul",
             "longitude":"69.1761",
             "latitude":"34.5228"
          },
          {  
             "id":"AFR",
             "iso2Code":"A9",
             "name":"Africa",
             "region":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "lendingType":{  
                "id":"",
                "iso2code":"",
                "value":"Aggregates"
             },
             "capitalCity":"",
             "longitude":"",
             "latitude":""
          },
          {  
             "id":"AGO",
             "iso2Code":"AO",
             "name":"Angola",
             "region":{  
                "id":"SSF",
                "iso2code":"ZG",
                "value":"Sub-Saharan Africa "
             },
             "adminregion":{  
                "id":"SSA",
                "iso2code":"ZF",
                "value":"Sub-Saharan Africa (excluding high income)"
             },
             "incomeLevel":{  
                "id":"LMC",
                "iso2code":"XN",
                "value":"Lower middle income"
             },
             "lendingType":{  
                "id":"IBD",
                "iso2code":"XF",
                "value":"IBRD"
             },
             "capitalCity":"Luanda",
             "longitude":"13.242",
             "latitude":"-8.81155"
          },
          {  
             "id":"ALB",
             "iso2Code":"AL",
             "name":"Albania",
             "region":{  
                "id":"ECS",
                "iso2code":"Z7",
                "value":"Europe & Central Asia"
             },
             "adminregion":{  
                "id":"ECA",
                "iso2code":"7E",
                "value":"Europe & Central Asia (excluding high income)"
             },
             "incomeLevel":{  
                "id":"UMC",
                "iso2code":"XT",
                "value":"Upper middle income"
             },
             "lendingType":{  
                "id":"IBD",
                "iso2code":"XF",
                "value":"IBRD"
             },
             "capitalCity":"Tirane",
             "longitude":"19.8172",
             "latitude":"41.3317"
          },
          {  
             "id":"AND",
             "iso2Code":"AD",
             "name":"Andorra",
             "region":{  
                "id":"ECS",
                "iso2code":"Z7",
                "value":"Europe & Central Asia"
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"HIC",
                "iso2code":"XD",
                "value":"High income"
             },
             "lendingType":{  
                "id":"LNX",
                "iso2code":"XX",
                "value":"Not classified"
             },
             "capitalCity":"Andorra la Vella",
             "longitude":"1.5218",
             "latitude":"42.5075"
          },
          {  
             "id":"ANR",
             "iso2Code":"L5",
             "name":"Andean Region",
             "region":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "lendingType":{  
                "id":"",
                "iso2code":"",
                "value":"Aggregates"
             },
             "capitalCity":"",
             "longitude":"",
             "latitude":""
          },
          {  
             "id":"ARB",
             "iso2Code":"1A",
             "name":"Arab World",
             "region":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"NA",
                "iso2code":"NA",
                "value":"Aggregates"
             },
             "lendingType":{  
                "id":"",
                "iso2code":"",
                "value":"Aggregates"
             },
             "capitalCity":"",
             "longitude":"",
             "latitude":""
          },
          {  
             "id":"ARE",
             "iso2Code":"AE",
             "name":"United Arab Emirates",
             "region":{  
                "id":"MEA",
                "iso2code":"ZQ",
                "value":"Middle East & North Africa"
             },
             "adminregion":{  
                "id":"",
                "iso2code":"",
                "value":""
             },
             "incomeLevel":{  
                "id":"HIC",
                "iso2code":"XD",
                "value":"High income"
             },
             "lendingType":{  
                "id":"LNX",
                "iso2code":"XX",
                "value":"Not classified"
             },
             "capitalCity":"Abu Dhabi",
             "longitude":"54.3705",
             "latitude":"24.4764"
          },
          {  
             "id":"ARG",
             "iso2Code":"AR",
             "name":"Argentina",
             "region":{  
                "id":"LCN",
                "iso2code":"ZJ",
                "value":"Latin America & Caribbean "
             },
             "adminregion":{  
                "id":"LAC",
                "iso2code":"XJ",
                "value":"Latin America & Caribbean (excluding high income)"
             },
             "incomeLevel":{  
                "id":"UMC",
                "iso2code":"XT",
                "value":"Upper middle income"
             },
             "lendingType":{  
                "id":"IBD",
                "iso2code":"XF",
                "value":"IBRD"
             },
             "capitalCity":"Buenos Aires",
             "longitude":"-58.4173",
             "latitude":"-34.6118"
          }
       ]
    }
]

课程：

public class RootObject
{
    public Page page { get; set; }
    public List<Datum> data { get; set; }
}

public class Page
{
    public int page { get; set; }
    public int pages { get; set; }
    public string per_page { get; set; }
    public int total { get; set; }
}

公共类根对象
{
公共页页面{get；set；}
公共列表数据{get；set；}
}
公共类页面
{
公共整型页{get；set；}
公共整型页{get；set；}
每个页面的公共字符串{get；set；}
公共整数总计{get；set；}
}

您的json是一个数组，因此需要使用JArroy.Parse而不是JObject.Parse

替换

JObject googleSearch = JObject.Parse(googleSearchText);

为了

然后，您可以导航到de JArray以查找您的值

// get JSON result objects into a list IList<JToken> results =
var results = googleSearch.Last.ToList();

// serialize JSON results into .NET objects IList<SearchResult>
List<Country> countyList = new List<Country>();

foreach (JToken result in results)
{
    // JToken.ToObject is a helper method that uses JsonSerializer internally
    var country = new Country { Id = result["id"].ToString(), Value = result["name"].ToString() };
    countyList.Add(country);
}

//将JSON结果对象放入IList结果列表中=
var results=googleSearch.Last.ToList（）；
//将JSON结果序列化为.NET对象IList
List countyList=新列表（）；
foreach（JToken result in results）
{
//ToObject是一个在内部使用JsonSerializer的助手方法
var country=new country{Id=result[“Id”].ToString（），Value=result[“name”].ToString（）}；
countyList.Add（国家）；
}

是否出现错误？请尝试使用此@MarkC生成模型。我在第行得到了错误：Info=JsonConvert.DeserializeObject（json）；无法将当前JSON数组（例如[1,2,3]）反序列化为类型“eJompo.Models.PaginAction”，因为该类型需要一个JSON对象（例如{“name”：“value”}）才能正确反序列化。

JArray googleSearch = JArray.Parse(googleSearchText);

// get JSON result objects into a list IList<JToken> results =
var results = googleSearch.Last.ToList();

// serialize JSON results into .NET objects IList<SearchResult>
List<Country> countyList = new List<Country>();

foreach (JToken result in results)
{
    // JToken.ToObject is a helper method that uses JsonSerializer internally
    var country = new Country { Id = result["id"].ToString(), Value = result["name"].ToString() };
    countyList.Add(country);
}