当对象名称是动态的时，如何获取 json 对象的值？答案

【问题标题】：How can I get Value of json object when Object name is dynamic?当对象名称是动态的时，如何获取 json 对象的值？
【发布时间】：2017-03-02 07:59:30
【问题描述】：

我正在使用 c# 在我的 asp.net mvc 项目中使用域名的促销定价 api。我想获得特定产品密钥的经销商价格，例如“dotgold”。在这个 Api 对象名称是动态的，如 59,58 等等。我怎样才能做到这一点。以下是该 api 的 json 对象...

{
  "59": {
    "customerprice": "528.00",
    "timestamp": "2017-02-10 13:59:16.711147+00",
    "actiontype": "addnewdomain",
    "resellerpricecurrencysymbol": "INR",
    "resellerpricetwo": "748.00",
    "isactive": "true",
    "starttime": "1486393372",
    "productkey": "dotjetzt",
    "creationdt": "1486735157",
    "promoid": "13333",
    "serviceprovidersellingcurrency": "INR",
    "istrickleallow": "true",
    "resellerpriceone": "489.50",
    "resellerid": "683272",
    "barrierprice": "680.0",
    "period": "1",
    "endtime": "1491004799",
    "resellerprice": "445.0"
  },
  "58": {
    "customerprice": "302.50",
    "timestamp": "2017-02-10 13:59:16.711147+00",
    "actiontype": "addnewdomain",
    "resellerpricecurrencysymbol": "INR",
    "resellerpricetwo": "451.00",
    "isactive": "true",
    "starttime": "1486393234",
    "productkey": "dotgold",
    "creationdt": "1486735157",
    "promoid": "13332",
    "serviceprovidersellingcurrency": "INR",
    "istrickleallow": "true",
    "resellerpriceone": "264.00",
    "resellerid": "683272",
    "barrierprice": "410.0",
    "period": "1",
    "endtime": "1491004799",
    "resellerprice": "240.0"
  }
}

下面是反序列化 json 对象的代码

string redirect = @"https://test.httpapi.com/api/resellers/promo-details.json?auth-userid=xxxx&api-key=xxxxxxxxxxxx";
string html;
var headers = new System.Net.WebHeaderCollection();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(redirect);
request.AutomaticDecompression = DecompressionMethods.GZip;

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream stream = response.GetResponseStream();
using (StreamReader reader = new StreamReader(stream))
{
    html = reader.ReadToEnd();
}

var stuff = JObject.Parse(html2);

【问题讨论】：

如果不知道您是如何反序列化 JSON 或 JSON 是什么样子，真的很难为您提供帮助。请提供minimal reproducible example - 请注意这不是特定于 ASP.NET 的，因此控制台应用程序将更容易演示。
我已经给了json对象
但是到目前为止，您还没有为您尝试过的内容提供任何代码，而且您提供的 JSON 远非最小 - 我们不需要为每个值查看 18 个属性，只需足以制作有代表性的样本。
现在有一些代码，但它最初是糟糕格式的 - 请在点击提交之前使用预览来确保帖子看起来像您想要的样子。现在，您提供的大部分代码都是关于如何将 JSON 作为字符串获取，这并不是非常重要 - 但至少您已经证明您正在使用 JObject.Parse。现在您可以只遍历JObject 中的所有属性，或者您可以反序列化为Dictionary<int, SomeClass>。
如果您不想为 JSON 创建具体的类类型，那么您可以使用 ExpandoObject 并将其视为动态的。但是，如果您可以创建一个类并管理您想要拥有的属性，那就太好了。然后使用 Json.NET 的 JsonConvert.Deserialize 方法对它进行相应的反序列化以键入 Dictionary。

标签： c# asp.net json

【解决方案1】：

如果您还没有安装Newtonsoft.Json nuget 包，请安装。然后使用它将 json 反序列化为 Dictionary<int, Product> 其中 product 是您的 dto 类。也可以反序列化为Dictinoary<int, dynamic>

这是一个例子

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace Deserialize
{
    public class ProductDto
    {
        public decimal customerprice { get; set; }
        public DateTime timestamp { get; set; }
        public string actiontype { get; set; }
        public string resellerpricecurrencysymbol { get; set; }
        public string resellerpricetwo { get; set; }
        public string isactive { get; set; }
        public string starttime { get; set; }
        public string productkey { get; set; }
        public string creationdt { get; set; }
        public int promoid { get; set; }
        public string serviceprovidersellingcurrency { get; set; }
        public bool istrickleallow { get; set; }
        public decimal resellerpriceone { get; set; }
        public int resellerid { get; set; }
        public decimal barrierprice { get; set; }
        public string period { get; set; }
        public long endtime { get; set; }
        public decimal resellerprice { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var json = "{" + Environment.NewLine +
                "  \"59\": {" + Environment.NewLine +
                "    \"customerprice\": \"528.00\"," + Environment.NewLine +
                "    \"timestamp\": \"2017-02-10 13:59:16.711147+00\"," + Environment.NewLine +
                "    \"actiontype\": \"addnewdomain\"," + Environment.NewLine +
                "    \"resellerpricecurrencysymbol\": \"INR\"," + Environment.NewLine +
                "    \"resellerpricetwo\": \"748.00\"," + Environment.NewLine +
                "    \"isactive\": \"true\"," + Environment.NewLine +
                "    \"starttime\": \"1486393372\"," + Environment.NewLine +
                "    \"productkey\": \"dotjetzt\"," + Environment.NewLine +
                "    \"creationdt\": \"1486735157\"," + Environment.NewLine +
                "    \"promoid\": \"13333\"," + Environment.NewLine +
                "    \"serviceprovidersellingcurrency\": \"INR\"," + Environment.NewLine +
                "    \"istrickleallow\": \"true\"," + Environment.NewLine +
                "    \"resellerpriceone\": \"489.50\"," + Environment.NewLine +
                "    \"resellerid\": \"683272\"," + Environment.NewLine +
                "    \"barrierprice\": \"680.0\"," + Environment.NewLine +
                "    \"period\": \"1\"," + Environment.NewLine +
                "    \"endtime\": \"1491004799\"," + Environment.NewLine +
                "    \"resellerprice\": \"445.0\" " + Environment.NewLine +
                "  }," + Environment.NewLine +
                "  \"58\": {" + Environment.NewLine +
                "    \"customerprice\": \"302.50\"," + Environment.NewLine +
                "    \"timestamp\": \"2017-02-10 13:59:16.711147+00\"," + Environment.NewLine +
                "    \"actiontype\": \"addnewdomain\"," + Environment.NewLine +
                "    \"resellerpricecurrencysymbol\": \"INR\"," + Environment.NewLine +
                "    \"resellerpricetwo\": \"451.00\"," + Environment.NewLine +
                "    \"isactive\": \"true\"," + Environment.NewLine +
                "    \"starttime\": \"1486393234\"," + Environment.NewLine +
                "    \"productkey\": \"dotgold\"," + Environment.NewLine +
                "    \"creationdt\": \"1486735157\"," + Environment.NewLine +
                "    \"promoid\": \"13332\"," + Environment.NewLine +
                "    \"serviceprovidersellingcurrency\": \"INR\"," + Environment.NewLine +
                "    \"istrickleallow\": \"true\"," + Environment.NewLine +
                "    \"resellerpriceone\": \"264.00\"," + Environment.NewLine +
                "    \"resellerid\": \"683272\"," + Environment.NewLine +
                "    \"barrierprice\": \"410.0\"," + Environment.NewLine +
                "    \"period\": \"1\"," + Environment.NewLine +
                "    \"endtime\": \"1491004799\"," + Environment.NewLine +
                "    \"resellerprice\": \"240.0\"" + Environment.NewLine +
                "  }" + Environment.NewLine +
                "}";

            var values = JsonConvert.DeserializeObject<Dictionary<int, ProductDto>>(json);

            foreach (var v in values)
            {
                var poductId = v.Key;
                var product = v.Value;
                Console.WriteLine(poductId + " " + product.resellerpriceone);
            }
        }
    }
}

【讨论】：