为 json 创建和填充数据答案

【问题标题】：Creating and filling data for json为 json 创建和填充数据
【发布时间】：2019-08-07 04:58:55
【问题描述】：

所以...我得到了以下两个用于 json 文件的类

    public class Scorebot
    {
        public string Messagedata { get; set; }
        public string CurrentScoreCt { get; set; }
        public string CurrentScoreT { get; set; }
        public string TeamNameCt { get; set; }
        public string TeamNameT { get; set; }
        public Players[] PlayersCt { get; set; }
        public Players[] PlayersT { get; set; }
    }

    public class Players
    {
        public string Nickname { get; set; }
        public string Weapon { get; set; }
        public string Health { get; set; }
        public string Armor { get; set; }
        public string Money { get; set; }
        public string Adr { get; set; }
        public string Kills { get; set; }
        public string Assists { get; set; }
        public string Deaths { get; set; }
    }

下面的 json 应该是这样的：

{
  "messagedata": "kyoto killed SEGADOBR",
  "currentscoreCT": "10",
  "currentscoreT": "10",
  "teamnameCT": "CT",
  "teamnameT": "T",
  "playersCT": [
            {
              "Nickname": "SEGADOBR",
              "Weapon": "ak47",
              "Health": "100",
              "Armor": "100",
              "Money": "16000",
              "ADR": "13.6",
              "Kills": "16",
              "Assists": "5",
              "Deaths": "18"
            }
  ],
  "playersT": [
            {
              "Nickname": "kyoto",
              "Weapon": "ak47",
              "Health": "100",
              "Armor": "100",
              "Money": "16000",
              "ADR": "13.6",
              "Kills": "999",
              "Assists": "5",
              "Deaths": "18"
            }
  ]     
}

我了解如何访问变量（Messagedata、CurrentScoreCt、CurrentScoreT、TeamNameCt 和 TeamNameT）。但是我应该怎么做才能填充这个（Players [] PlayersCt，Players [] PlayersT）中的元素，如何正确访问它们？

据我了解应该是这样的

Scorebot.PlayersCt[i].Nickname = "something"

但它没有用。怎么做？

【问题讨论】：

But it didn't work. 是什么意思？你面临什么问题？您是尝试从类对象创建 json 还是从 json 创建对象？
当我启动程序时，我得到了System.NullReferenceException: Object reference not set to an instance of an object.，并带有以下代码Scorebot.PlayersT = new Players[5]; Scorebot.PlayersCt = new Players[5]; for (var i = 0; i < 5; i++) { Scorebot.PlayersCt[i].Nickname = "Noone"; } for (var i = 0; i < 5; i++) { Scorebot.PlayersT[i].Nickname = "Noone"; }
@Nicerok1 你有没有初始化这些变量/数组？我猜不是。引用类型将默认为 null，直到您为其赋值。
What is a NullReferenceException, and how do I fix it?的可能重复
我正在尝试从“Scorebot”类创建 json，它一直有效，直到我开始尝试填充数组 PlayersT 和 PlayersCt

标签： c# arrays json class json.net

【解决方案1】：

你可以这样填写你的对象：

var scoreBot = new Scorebot
{
    Messagedata = "kyoto killed SEGADOBR",
    CurrentScoreCt = "10",
    CurrentScoreT = "10",
    TeamNameCt = "CT",
    TeamNameT = "T",
    PlayersCt = new Players[]
    {
        new Players
        {
            Nickname = "SEGADOBR",
            Weapon = "ak47",
            Health = "100",
            Armor = "100",
            Money = "16000",
            Adr = "13.6",
            Kills = "16",
            Assists = "5",
            Deaths = "18"
        }
    },
    PlayersT = new Players[]
    {
        new Players
        {
            Nickname = "kyoto",
            Weapon = "ak47",
            Health = "100",
            Armor = "100",
            Money = "16000",
            Adr = "13.6",
            Kills = "999",
            Assists = "5",
            Deaths = "18"
        }
    }
};

然后您可以使用Newtonsoft.Json 简单地将其转换为 JSON：

var jsonScoreBot = JsonConvert.SerializeObject(scoreBot);

Console.WriteLine(jsonScoreBot);
// {"Messagedata":"kyoto killed SEGADOBR","CurrentScoreCt":"10","CurrentScoreT":"10","TeamNameCt":"CT","TeamNameT":"T","PlayersCt":[{"Nickname":"SEGADOBR","Weapon":"ak47","Health":"100","Armor":"100","Money":"16000","Adr":"13.6","Kills":"16","Assists":"5","Deaths":"18"}],"PlayersT":[{"Nickname":"kyoto","Weapon":"ak47","Health":"100","Armor":"100","Money":"16000","Adr":"13.6","Kills":"999","Assists":"5","Deaths":"18"}]}

现在您也可以简单地调用scoreBot.PlayersCt[i].Nickname = "Noone" 来更新对象。请注意PlayersCt 中只存在一个元素，因此i 必须为0 以避免System.IndexOutOfRangeException。

【讨论】：

谢谢！但我还有一些问题。我会给你写一封电子邮件，所以你能在你的空闲时间帮助我吗？
@Nicerok11 你可以在这里提问。我很乐意为您提供更多帮助，只要它仍然与问题相关。

【解决方案2】：

我对 Scorebot 做了一些改动不要使用数组，而是使用通用列表。

public class Scorebot
    {
        public string Messagedata { get; set; }
        public string CurrentScoreCt { get; set; }
        public string CurrentScoreT { get; set; }
        public string TeamNameCt { get; set; }
        public string TeamNameT { get; set; }
        public List<Players> PlayersCt { get; set; }
        public List<Players> PlayersT { get; set; }
    }

    public class Players
    {
        public string Nickname { get; set; }
        public string Weapon { get; set; }
        public string Health { get; set; }
        public string Armor { get; set; }
        public string Money { get; set; }
        public string Adr { get; set; }
        public string Kills { get; set; }
        public string Assists { get; set; }
        public string Deaths { get; set; }
    }

然后只需创建一个 Scorebot 的对象以及玩家类喜欢

Scorebot objModel = new Scorebot();
List<Players> PlayersCt = new List<Players>();
List<Players> Playersst = new List<Players>();

在这些对象中动态填充您想要的数据。那么

objModel.PlayersCt = PlayersCt ;
objModel.Playersst = Playersst ;

然后最后将该对象转换为 JSON 字符串，如

var jsonScoreBot = JsonConvert.SerializeObject(objModel);

【讨论】：

谢谢！但是我应该如何将数据填充到该列表中？所以我需要在列表中创建一个新玩家，然后填写属性（昵称等）？