Json数组反序列化

Posted 2023-03-31

【中文标题】Json数组反序列化

【英文标题】：Json array deserialize

【发布时间】：2015-10-18 08:03:03

【问题描述】：

如何反序列化下面的 json 数组。无法获取 field_options 值和 field_options 数组。我正在使用 DataContractJsonSerializer 进行反序列化。 我需要获取 field_options 之类的大小，然后如果 field_type 是下拉列表，我将需要 field_options -> options -> lebel 和检查值以及 include_blank_option 的值。

string jsonString = @"[""fields"":[""label"":""Untitled"",""field_type"":""paragraph"",""required"":true,""field_options"":""size"":""small"",""cid"":""c2"",""label"":""Untitled"",""field_type"":""text"",""required"":true,""field_options"":""size"":""small"",""cid"":""c6"",""label"":""Untitled"",""field_type"":""dropdown"",""required"":true,""field_options"":""options"":[""label"":""kjhkjh"",""checked"":false,""label"":"",hkjkhkj"",""checked"":false],""include_blank_option"":true,""cid"":""c8""]]";

    DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(List<field>));
    MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
    var obj = (List<field>)ser.ReadObject(stream);


        foreach (Person sp in obj[0].fields)
        
            Response.Write(sp.cid + sp.field_type + sp.label + sp.required + "<BR>");
            List<sizee> si = sp.field_options;
            foreach (sizee sz in si)
            
                Response.Write(sz.size);
            
        

[DataContract]
class field

    [DataMember]
    public List<Person> fields  get; set; 


[DataContract]
class Person

    [DataMember]
    public string label  get; set; 
    [DataMember]
    public string field_type  get; set; 
    [DataMember]
    public string required  get; set; 
    [DataMember]
    public string cid  get; set; 
    [DataMember]
    public List<sizee> field_options  get; set; 


[DataContract]
class sizee

    [DataMember]
    public string size  get; set; 
    [DataMember]
    public List<option> size  get; set; 


[DataContract]
class option

    [DataMember]
    public string checke  get; set; 
    [DataMember]
    public string label  get; set; 

非常感谢。

【参考方案1】：

我通常发现将示例数据写入文件有助于解决这些类型问题。我公开了这些类，并在其中一个类中修复了重复的属性大小。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.IO;

namespace ConsoleApplication1

    class Program
    
        const string FILENAME = @"c:\temp\test.txt";
        static void Main(string[] args)
        
            field f = new field()
            
                fields = new List<Person>() 
                    new Person() 
                        cid = "abc",
                        field_type = "def",
                        label = "ghi",
                        required = "true",
                        field_options = new List<sizee>() 
                            new sizee() 
                                size = "AAA",
                                options = new List<option>() 
                                    new option() 
                                        checke = "123",
                                        label = "456",
                                    ,
                                   new option() 
                                        checke = "789",
                                        label = "012",
                                    
                                
                            ,
                           new sizee() 
                                size = "BBB",
                                options = new List<option>() 
                                    new option() 
                                        checke = "321",
                                        label = "654",
                                    ,
                                   new option() 
                                        checke = "987",
                                        label = "210",
                                    
                                
                            
                        
                    ,
                   new Person() 
                        cid = "xyz",
                        field_type = "def",
                        label = "ghi",
                        required = "true",
                        field_options = new List<sizee>() 
                            new sizee() 
                                size = "AAA",
                                options = new List<option>() 
                                    new option() 
                                        checke = "123",
                                        label = "456",
                                    ,
                                   new option() 
                                        checke = "789",
                                        label = "012",
                                    
                                
                            ,
                           new sizee() 
                                size = "BBB",
                                options = new List<option>() 
                                    new option() 
                                        checke = "321",
                                        label = "654",
                                    ,
                                   new option() 
                                        checke = "987",
                                        label = "210",
                                    
                                
                            
                        
                    
                
            ;

            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(field));
            FileStream stream = File.OpenWrite(FILENAME);
            ser.WriteObject(stream, f);

            stream.Flush();
            stream.Close();
            stream.Dispose();

        
    



    [DataContract]
    public class field
    
        [DataMember]
        public List<Person> fields  get; set; 
    

    [DataContract]
    public class Person
    
        [DataMember]
        public string label  get; set; 
        [DataMember]
        public string field_type  get; set; 
        [DataMember]
        public string required  get; set; 
        [DataMember]
        public string cid  get; set; 
        [DataMember]
        public List<sizee> field_options  get; set; 
    

    [DataContract]
    public class sizee
    
        [DataMember]
        public string size  get; set; 
        [DataMember]
        public List<option> options  get; set; 
    

    [DataContract]
    public class option
    
        [DataMember]
        public string checke  get; set; 
        [DataMember]
        public string label  get; set; 
    


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