如何从Json字符串中读取特定的Json对象

本文关键字：Json 对象 读取 字符串 | 更新日期: 2023-09-27 18:13:30

以下是JSON字符串:

{
"ios_info": {
    "serialNumber": "F2LLMBNJFFF",
    "imeiNumber": "01388400413235",
    "meid": "",
    "iccID": "8901410427640096045",
    "firstUnbrickDate": "11/27/13",
    "lastUnbrickDate": "11/27/13",
    "unbricked": "true",
    "unlocked": "false",
    "productVersion": "7.1.2",
    "initialActivationPolicyID": "23",
    "initialActivationPolicyDetails": "US AT&T Puerto Rico and US Virgin Islands Activation Policy",
    "appliedActivationPolicyID": "23",
    "appliedActivationDetails": "US AT&T Puerto Rico and US Virgin Islands Activation Policy",
    "nextTetherPolicyID": "23",
    "nextTetherPolicyDetails": "US AT&T Puerto Rico and US Virgin Islands Activation Policy",
    "macAddress": "ACFDEC6C988A",
    "bluetoothMacAddress": "AC:FD:EC:6C:98:8B",
    "partDescription": "IPHONE 5S SPACE GRAY 64GB-USA"
},
"fmi": {
    "@attributes": {
        "version": "1",
        "deviceCount": "1"
    },
    "fmipLockStatusDevice": {
        "@attributes": {
            "serial": "F2LLMBNJFFFQ",
            "imei": "013884004132355",
            "isLocked": "true",
            "isLost": "false"
        }
    }
},
"product_info": {
    "serialNumber": "F2LLMBNJFFFQ",
    "warrantyStatus": "Apple Limited Warranty",
    "coverageEndDate": "11/25/14",
    "coverageStartDate": "11/26/13",
    "daysRemaining": "498",
    "estimatedPurchaseDate": "11/26/13",
    "purchaseCountry": "United States",
    "registrationDate": "11/26/13",
    "imageURL": "http://service.info.apple.com/parts/service_parts/na.gif",
    "explodedViewURL": "http://service.info.apple.com/manuals-ssol.html",
    "manualURL": "http://service.info.apple.com/manuals-ssol.html",
    "productDescription": "iPhone 5S",
    "configDescription": "IPHONE 5S GRAY 64GB GSM",
    "slaGroupDescription": "",
    "contractCoverageEndDate": "11/25/15",
    "contractCoverageStartDate": "11/26/13",
    "contractType": "C1",
    "laborCovered": "Y",
    "limitedWarranty": "Y",
    "partCovered": "Y",
    "notes": "Covered by AppleCare+ - Incidents Available",
    "acPlusFlag": "Y",
    "consumerLawInfo": {
        "serviceType": "",
        "popMandatory": "",
        "allowedPartType": ""
    }
}
}

以下读取Key:Value中所有 JSON并以表格式显示，但我只需要特定对象即FMIsection json字符串:

private string GetKeyValuePairs(string jsonString)
    {
        var resDict = JsonConvert.DeserializeObject<Dictionary<string, object>>(jsonString);
        string sdict = string.Empty;
        string fmitxt = string.Empty;
        string fmitxt2 = string.Empty;
        foreach (string key in resDict.Keys)
        {
          sdict += "<tr><td> " + key + "</td> " + (resDict[key].GetType() == typeof(Newtonsoft.Json.Linq.JObject) ? "<td>" + GetKeyValuePairs(resDict[key].ToString()) + "</td></tr>" : "<td>" + resDict[key].ToString() + "</td></tr>");
        }
        return sdict;
    }

问题:

我想读取"fmi"部分的所有内容，仅。并显示在key:Value中。表格式

注意:我正在使用框架3.5，因此不能使用dynamic关键字。任何想法?

如何从Json字符串中读取特定的Json对象

我建议你直接使用它作为JObject;如果你使用的是dynamic，这就是你在幕后使用的类。此外，您需要将fmi的选择从递归调用中完成的正常路径中分离出来:这里我在Main中进行了选择。

void Main()
{
    var resObj = JsonConvert.DeserializeObject<JObject>(jsonString);
    var result = GetKeyValuePairs((JObject)resObj["fmi"]);
}
private string GetKeyValuePairs(JObject resObj)
{
    string sDict = string.Empty;
    string fmitxt = string.Empty;
    string fmitxt2 = string.Empty;
    foreach (var pair in resObj)
    {
      sDict += "<tr><td> " + pair.Key + "</td>";
      if (pair.Value is JObject)
        sDict += "<td>" + GetKeyValuePairs((JObject)pair.Value) + "</td></tr>";
      else
        sDict += "<td>" + pair.Value.ToString() + "</td></tr>";
    }
    return sDict;
}

由于您没有将其反序列化为"强类型"对象，因此您可以这样做:

    var fmi = JsonConvert.DeserializeObject<Dictionary<string,object>>(str)["fmi"];
    var keys = JsonConvert.DeserializeObject<Dictionary<string, object>>(fmi.ToString());

这可以用这种方法精确地解决，只需记住，您将需要Newtonsoft.Json;

//using Newtonsoft.Json;
// using System.IO;
string dataPath = @"myfile.json"; // Location of the json
string jsonData = "";
using (StreamReader r = new StreamReader(Path.Combine(dataPath)))
{
    string json = r.ReadToEnd();
    jsonData = json;
}
dynamic obj = JsonConvert.DeserializeObject(jsonData);
string value = obj["name"]; // here name is the object name holding the required data
Console.WriteLine(value);
Console.ReadLine();
/*
* OUTPUT
* itzplayz
*/

JSON示例

{
  "name": "itzplayz"
}

现在您可以在名为value

的字符串中获得JSON对象的值
相关文章：