Json 反序列化错误 „'W' 是值的无效开始

Question

我需要在控制台中创建一个简单的游戏。我有序列化 JSON，当我想反序列化这个文件时，我有这个错误： System.Text.Json.JsonException: „'W' is an invalid start of a value. Path: $ | LineNumber: 0 | BytePositionInLine: 0.”

这是我的代码类:

public class Person
{
    public string Speciality { get; set; }
    public int PWZ { get; set; }
    public string Name { get; set; }
    public string Surname { get; set; }
    public List<string> Items { get; set; }
}

public class Monster
{
    public string Name { get; set; }
    public List<string> Skills { get; set; }
}

public class Root
{
    public List<Person> people { get; set; }
    public List<Monster> monsters { get; set; }
}

Json 文件

{
  "Person": [
    {
      "Speciality": "Archer",
      "PWZ": 432742,
      "Name": "Charlie",
      "Surname": "Evans",
      "Items": [
        "Bow",
        "Arrow",
      ]
    },
    {
      "Speciality": "Soldier",
      "PWZ": 432534879,
      "Name": "Harry",
      "Surname": "Thomas",
      "Items": [
        "Gun",
        "Knife",
     ]
    }
  ],
  "Monster": [
    {
      "Name": "Papua",
      "Skills": [
        "Jump",
        "SlowWalk",
      ]
    },
    {
     "Name": "Geot",
      "Skills": [
        "Run",
        "Push",
      ]
    }
  ]
}

这是我用来反序列化 json 文件的代码：

string fileName = "Local.json";
var options = new JsonSerializerOptions { AllowTrailingCommas = true };
var result = JsonSerializer.Deserialize<Root>(fileName, options);

我没有对 JSON 文件进行序列化和反序列化。提前致谢。

Answer 1

您可以使用以下 Model 结构反序列化您的 JSON:

using System;
using System.Collections.Generic;
using System.Text.Json;
                    
public class Program
{
    public static void Main()
    {
        var myString=@"{'Person':[{'Speciality':'Archer','PWZ':432742,'Name':'Charlie','Surname':'Evans','Items':['Bow','Arrow']},{'Speciality':'Soldier','PWZ':432534879,'Name':'Harry','Surname':'Thomas','Items':['Gun','Knife']}],'Monster':[{'Name':'Papua','Skills':['Jump','SlowWalk']},{'Name':'Geot','Skills':['Run','Push']}]}";
        var options = new JsonSerializerOptions { AllowTrailingCommas = true };
        var result = JsonSerializer.Deserialize<Root>(myString, options);
        foreach(var item in result.Person)
        {
            Console.WriteLine(item.Name);
        }
    }
}

public class Person
{
    public string Speciality { get; set; }
    public int PWZ { get; set; }
    public string Name { get; set; }
    public string Surname { get; set; }
    public List<string> Items { get; set; }
}

public class Monster
{
    public string Name { get; set; }
    public List<string> Skills { get; set; }
}

public class Root
{
    public List<Person> Person { get; set; }
    public List<Monster> Monster { get; set; }
}

Answer 2

在您之前的 you were advised to 中将属性重命名为 Person 和 Monster。

假设这没有恢复，那么这里的问题是您如何读取和尝试反序列化文件。您需要打开文件的内容然后反序列化，但您错误地尝试反序列化 fileName 字符串。正确代码如下：

string fileName = "Local.json";
// open the file contents
string jsonContents = File.ReadAllText(fileName);
var options = new JsonSerializerOptions { AllowTrailingCommas = true };
// deserialize the file contents, not the fileName
var result = JsonSerializer.Deserialize<Root>(jsonContents, options);

Json 反序列化错误 „'W' 是值的无效开始

Json deserialization error „'W' is an invalid start of a value

c#

json

serialization

deserialization