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 } }