C# JSON转为实体类和List，以及结合使用

「爱情、让人受尽委屈。」 2024-03-27 18:59 80阅读 0赞

## 引用 ##

using Newtonsoft.Json;
    
    using Newtonsoft.Json.Linq;

## JSON转实体类 ##

public class Person
    {
        
    	public string Name {
         get; set; }
    	public int Age {
         get; set; }
    	public string Gender {
         get; set; }
    }

string jsonStr = "{\"name\": \"Tom\", \"age\": 20, \"gender\": \"male\"}";
    Person person = JsonConvert.DeserializeObject<Person>(jsonStr);

## JSON转List ##

### 方法一 ###

**json**

{
        
       "data":{
        
          [
             {
        
                "Id":"0",
                "Username":"Vreeswijk",
                "ProfilePicture":"media/user/0.png"
             }
          ],
          [
             {
        
                "Id":"1",
                "Username":"Mony",
                "ProfilePicture":"media/user/12.png"
             }
          ]
       }
    }

**实现**

JObject obj = JObject.Parse(json);
    
    //Shou是于json中数组一个元素所对应的类
    List<Shou> root = JsonConvert.DeserializeObject<List<Shou>>(obj["data"].ToString());

### 方法二 ###

**json**：

{
        
       "user":{
        
          [
             {
        
                "Id":"0",
                "Username":"Vreeswijk",
                "ProfilePicture":"media/user/0.png"
             }
          ]
       },
       "token":{
        
          [
             {
        
                "access_token":"myToken1",
                "refresh_token":"myToken2",
                "expires_in":3600,
                "expires_on":1577363756
             }
          ]
       }
    }

**两个类**：

**实现**

var jObject = JObject.Parse(json);
    var userPropery = jObject["user"] as JArray;
    List<User> userList= new List<User>();
    
    foreach (var property in userPropery )
    {
        
        var propertyList = JsonConvert.DeserializeObject<List<user>>(property.ToString());
    	//List集合中的AddRange方法和Add方法的不同之处在于，Add方法为在集合末尾添加单个元素对象，而AddRange方法可以为添加整个目标list集合。
        userList.AddRange(propertyList);
    }

## 结合使用 ##

**json**：

{
        
       "number": 1,
       "day": "星期九",
       "user":{
        
          [
             {
        
                "Id":"0",
                "Username":"Vreeswijk",
                "ProfilePicture":"media/user/0.png"
             }
          ]
       },
       "token":{
        
           "access_token":"myToken1",
           "refresh_token":"myToken2",
           "expires_in":3600,
           "expires_on":1577363756
       }
    }

**两个类**：

public class Token
    {
        
        public string access_token {
         get; set; }
        public string refresh_token {
         get; set; }
        public int expire_in {
         get; set; }
        public int expire_on {
         get; set; }
    	//省略了构造方法
    }
    
    public class User
    {
        
        public int Id {
         get; set; }
        public string Username {
         get; set; }
        public string Password {
         get; set; }
        public string ProfilePicture {
         get; set; }
    	//省略了构造方法
    }
    
    public class Data
    {
        
        public int number {
         get; set; }
        public string day {
         get; set; }
    	public List<User> userList {
         get; set; }
        public Token token {
         get; set; }
    	//省略了构造方法
    }

**实现**

var jObject = JObject.Parse(json);
    
    List<User> userList = JsonConvert.DeserializeObject<List<Shou>>(jObject["data"].ToString());
    Token token = JsonConvert.DeserializeObject<Token>(jObject["token"]);
    int number = int.Parse(jObject["number"]);
    string day = jObject["day"].ToString();
    
    Data data = new Data(number,day,userList,token);