如何用C#解析含无命名节点的JSON，获取name值及对应根节点编号？

我来帮你解决这个C#解析无命名根节点JSON的问题，核心思路是把这个结构当成键为周期ID、值为周期对象的字典来处理，下面给你两种常用的实现方案：

先修正JSON语法错误 #

首先你的原始JSON有语法问题（多余的闭合括号和末尾逗号），修正后的正确格式如下：

{
  "3925": {
    "totalExecutions": 2,
    "endDate": "",
    "description": "",
    "totalExecuted": 2,
    "started": "",
    "versionName": "Custom Pipes Development",
    "expand": "executionSummaries",
    "projectKey": "WUSDV007",
    "versionId": 22361,
    "environment": "",
    "totalCycleExecutions": 2,
    "totalDefects": 0,
    "build": "",
    "createdBy": "mghosh",
    "ended": "",
    "name": "SetMaxFutureDateFromCustomerField_Mobile",
    "totalFolders": 0,
    "modifiedBy": "mghosh",
    "projectId": 17101,
    "createdByDisplay": "Mayukh Ghosh",
    "startDate": ""
  },
  "3932": {
    "totalExecutions": 2,
    "endDate": "",
    "description": "",
    "totalExecuted": 2,
    "started": "",
    "versionName": "Custom Pipes Development",
    "expand": "executionSummaries",
    "projectKey": "WUSDV007",
    "versionId": 22361,
    "environment": "",
    "totalCycleExecutions": 2,
    "totalDefects": 0,
    "build": "",
    "createdBy": "nkonda",
    "ended": "",
    "name": "WUSDV007-29779-Fee Validation",
    "totalFolders": 0,
    "modifiedBy": "nkonda",
    "projectId": 17101,
    "createdByDisplay": "Naveen Kumar Konda",
    "startDate": ""
  }
}

方案1：使用Newtonsoft.Json（Json.NET） #

这是.NET生态中广泛使用的JSON库，需要先通过NuGet安装Newtonsoft.Json包。

快速解析（无需实体类） #

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

class Program
{
    static void Main()
    {
        string json = @"[上面修正后的JSON字符串]";

        // 解析为字典，键就是根节点编号，值是对应的JSON对象
        var cycleDict = JsonConvert.DeserializeObject<Dictionary<string, JObject>>(json);

        // 遍历获取每个编号和对应的name值
        foreach (var kvp in cycleDict)
        {
            string cycleId = kvp.Key;
            string cycleName = kvp.Value["name"].ToString();
            Console.WriteLine($"周期ID: {cycleId}, 名称: {cycleName}");
        }
    }
}

类型安全解析（使用实体类） #

先定义对应JSON结构的实体类：

public class TestCycle
{
    public int totalExecutions { get; set; }
    public string endDate { get; set; }
    public string description { get; set; }
    public int totalExecuted { get; set; }
    public string started { get; set; }
    public string versionName { get; set; }
    public string expand { get; set; }
    public string projectKey { get; set; }
    public int versionId { get; set; }
    public string environment { get; set; }
    public int totalCycleExecutions { get; set; }
    public int totalDefects { get; set; }
    public string build { get; set; }
    public string createdBy { get; set; }
    public string ended { get; set; }
    public string name { get; set; }
    public int totalFolders { get; set; }
    public string modifiedBy { get; set; }
    public int projectId { get; set; }
    public string createdByDisplay { get; set; }
    public string startDate { get; set; }
}

然后解析为字典并遍历：

var cycleDict = JsonConvert.DeserializeObject<Dictionary<string, TestCycle>>(json);

foreach (var kvp in cycleDict)
{
    Console.WriteLine($"周期ID: {kvp.Key}, 名称: {kvp.Value.name}");
}

方案2：使用System.Text.Json（.NET Core 3.0+ / .NET 5+） #

如果使用较新的.NET版本，可以直接用内置的System.Text.Json，无需额外安装包。

快速解析（无需实体类） #

using System;
using System.Collections.Generic;
using System.Text.Json;

class Program
{
    static void Main()
    {
        string json = @"[上面修正后的JSON字符串]";

        // 解析为字典，键是周期ID，值是JsonElement类型
        var cycleDict = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(json);

        foreach (var kvp in cycleDict)
        {
            string cycleId = kvp.Key;
            string cycleName = kvp.Value.GetProperty("name").GetString();
            Console.WriteLine($"周期ID: {cycleId}, 名称: {cycleName}");
        }
    }
}

类型安全解析（使用实体类） #

同样使用上面定义的TestCycle类，解析代码如下：

var cycleDict = JsonSerializer.Deserialize<Dictionary<string, TestCycle>>(json);

foreach (var kvp in cycleDict)
{
    Console.WriteLine($"周期ID: {kvp.Key}, 名称: {kvp.Value.name}");
}

内容的提问来源于stack exchange，提问作者mach