.net 解析嵌套JSON

JSON格式文件如下：我们是要取出msgJsoncontent里面GeneralReportInfo下serviceData中的totalUseValue数据

{
    "responseCode": "100000",
    "message": "运行正确",
    "result": {
        "pageNum": 1,
        "pageSize": 10,
        "size": 10,
        "startRow": 1,
        "endRow": 10,
        "total": 27,
        "pages": 3,
        "list": [{
            "id": "7bcba4b7508a433db7664ec9f60fef2a",
            "registTime": "2019-07-01 23:49:17",
            "updateTime": "2019-07-01 23:49:48",
            "gmId": "9999999000008888",
            "concentratorNum": "",
            "deviceType": "",
            "subdeviceType": "",
            "anysType": 0,
            "port": 0,
            "ip": "",
            "msgJsoncontent": "{"identifier":"9000008888","hasMore":0,"mid":598,"msgType":"deviceReq","data":[{"serviceId":"GeneralReportInfo","serviceData":{"dfCount":"0","dfId":"0","connType":"0","deviceType":"2","subDeviceType":"12","companyNo":"999999","meterType":"0000","dataType":"00","totalUseValue":"7.90","recentFreezeValue":"7.90","deviceStatus":{"loseTrack":"0","valueLack":"0","leakAlarm":"0","remoteCloseValve":"1","vibrationStop":"0","buttonMode":"0","deviceLock":"0","isAccount":"1","breakLine":"0","singleCount":"0","magneticInterference":"0","superFlow":"0","factoryMode":"1","pressureLack":"0","valveState":"1"},"deviceTime":"20190701T234910Z","voltage":"4.91","identityCode":"89860317492039663768","moduleIMEI":"863703038784190","signalIntensity":"2","signalStrength":-1194,"signalPower":-1088,"signalCellID":163869138,"signalECL":1,"signalSNR":7,"signalPCI":295,"linkQuality":-136,"softWareVer":"9","firmwareVer":"R2027"}},{"serviceId":"FreezeDataReportInfo","serviceData":{"dfCount":"0","dfId":"0","connType":"0","deviceType":"2","subDeviceType":"12","companyNo":"999999","freezeCount":"0","freezeDatas":null}}]}",
            "msgContent": "BB01025602080C9999999000008888000000006000A8B670678C9E3DC24A5CF51A67E0003E8C6F3CF513378103CF2B221B965DCA91F5DD1A7834337C1FA61DE71B04CC54F916701A5A77CF0544A2FEACA2DD6942BBB9718B7CDF5EAF5B2E63A5FE28E3794644F3EEA39D6CAD30A08199991C43DC25626C",
            "hasTestHang": 0,
            "callbackResult": 1,
            "msgDeviceType": 0,
            "linkType": 0
        },{
            "id": "e33b54d057c34f10bfecfe55d2e9684d",
            "registTime": "2019-07-01 15:49:11",
            "updateTime": "2019-07-01 15:49:12",
            "gmId": "9999999000008888",
            "concentratorNum": "",
            "deviceType": "",
            "subdeviceType": "",
            "anysType": 0,
            "port": 0,
            "ip": "",
            "msgJsoncontent": "{"identifier":"9000008888","hasMore":0,"mid":586,"msgType":"deviceReq","data":[{"serviceId":"GeneralReportInfo","serviceData":{"dfCount":"0","dfId":"0","connType":"0","deviceType":"2","subDeviceType":"12","companyNo":"999999","meterType":"0000","dataType":"00","totalUseValue":"7.90","recentFreezeValue":"7.90","deviceStatus":{"loseTrack":"0","valueLack":"0","leakAlarm":"0","remoteCloseValve":"1","vibrationStop":"0","buttonMode":"0","deviceLock":"0","isAccount":"1","breakLine":"0","singleCount":"0","magneticInterference":"0","superFlow":"0","factoryMode":"1","pressureLack":"0","valveState":"1"},"deviceTime":"20190701T154905Z","voltage":"5.39","identityCode":"89860317492039663768","moduleIMEI":"863703038784190","signalIntensity":"3","signalStrength":-1139,"signalPower":-1069,"signalCellID":80010836,"signalECL":1,"signalSNR":93,"signalPCI":183,"linkQuality":-111,"softWareVer":"9","firmwareVer":"R2027"}},{"serviceId":"FreezeDataReportInfo","serviceData":{"dfCount":"0","dfId":"0","connType":"0","deviceType":"2","subDeviceType":"12","companyNo":"999999","freezeCount":"1","freezeDatas":[{"freezeDate":"20190701T150000Z","freezeValue":"7.90"}]}}]}",
            "msgContent": "BB01024A02080C9999999000008888000000006000544E03707B118B43F50857CFED37915A97599E43DD2E90FDD58B0D41820A81DD7390E567D81CD14E5ACF7330A1238A89141DB5F37AD1C70876BE7DA16F50BB85FA930EA0E8D1DDABFB8F91528D762A55B706CFC565D19B8C75B333D6FFE81F7FAB4E",
            "hasTestHang": 0,
            "callbackResult": 1,
            "msgDeviceType": 0,
            "linkType": 0
        }],
        "firstPage": 1,
        "prePage": 0,
        "nextPage": 2,
        "lastPage": 3,
        "isFirstPage": true,
        "isLastPage": false,
        "hasPreviousPage": false,
        "hasNextPage": true,
        "navigatePages": 8,
        "navigatepageNums": [1, 2, 3]
    },
    "args": ""
}

第一步：

responsecontent为上文的文件

将JSON字符串JObject格式化：JObject job = JObject.Parse(responsecontent);

第二步：将list里面的数据Jarray化： JArray array2 = JArray.Parse(job["result"]["list"].ToString());

循环array2得到我们想要的数据，命名比较随意请见谅，以下是具体的解析代码：

                        for (int j = 0; j < array2.Count; j++)
                        {
                            dr = dt.NewRow();
                            JObject jObject = JObject.Parse(array2[j].ToString());
                            
                            string ss = jObject["msgJsoncontent"].ToString();
                            JObject js = JObject.Parse(ss);
                            
                            string sss = js["data"].ToString();
                            JArray array = JArray.Parse(sss);
                            //通过lamda表达式选择data里面serviceId=GeneralReportInfo再获取下面的totalUseValue值
                            foreach (var item in array.Where(a => a["serviceId"].ToString() == "GeneralReportInfo"))
                            {
                                JObject a = JObject.Parse(item["serviceData"].ToString());
                                string totalUseValue  = a["totalUseValue"].ToString();//此处我们就得到了我们想要的数据 
                                
                            } 
                         }