Deserialize a nested json

Question

I was trying to deserialize nested json, however I got the below error, please advise,

Exception: Newtonsoft.Json.JsonReaderException: After parsing a value an unexpected character was encountered: {. Path 'ShppingAddress[0]', line 14, position 2.

 static void Main(string[] args)
        {
            string json = @"{
 'firstname':'test',
 'lastname':'test',

 'ShppingAddress':
 [
 {
 'ont_addressline1':'1',
 'ont_addressline2':'',
 'ont_city':'1',
 'ont_province':'',
 'ont_postalcode':''
 }
 {
 'ont_addressline1':'2',
 'ont_addressline2':'',
 'ont_city':'2',
 'ont_province':'',
 'ont_postalcode':''
 }
 ],

}";
            Console.WriteLine(json);
            ShippingInfo shippingInfo = JsonConvert.DeserializeObject<ShippingInfo>(json);
            Console.WriteLine("success");
        }

        public class ShippingInfo
        {
            public string firstname { get; set; }
            public string lastname { get; set; }
            public address address { get; set; }
        }

        public class address
        {
            public string ont_addressline1 { get; set; }
            public string ont_addressline2 { get; set; }

            public string ont_city { get; set; }
            public string ont_province { get; set; }
            public string ont_postalcode { get; set; }
        }
    }

Answer 1

See if the following would suit your needs.

See full source in one of my GitHub repositories done in Visual Studio 2019, C#8. Make sure to read the readme.md file.

Edit
I added another code sample that actually does a nested property (thought I had before), updated the repository. So the original below has this too.

private void SerializeShipInfoListNestedButton_Click(object sender, EventArgs e)  
{  
    var fileName = "ShipListNested.json";  
  
    var (success, createException) = Mockups.ShippingInfoNestedList().ModelToJson(fileName);  
    if (success)  
    {  
        var (shippingInfos, readException) = Helpers.JsonToListModel<ShippingInfo>(fileName);  
        if (readException == null)  
        {  
            foreach (var shippingInfo in shippingInfos)  
            {  
                Console.WriteLine($"{shippingInfo.ToString()}");  
                foreach (var somethingNested in shippingInfo.SomethingNested)  
                {  
                    Console.WriteLine($@" {somethingNested.Id}, {somethingNested.Value}");  
                }  
  
                Console.WriteLine();  
            }  
              
        }  
        else  
        {  
            MessageBox.Show(readException.Message);  
        }  
  
    }  
    else  
    {  
        MessageBox.Show(createException.Message);  
    }  
}  

Original.

using System;  
using System.Text;  
using System.Windows.Forms;  
using JsonCodeSamples.Classes;  
using JsonCodeSamples.Models;  
  
namespace JsonCodeSamples  
{  
    public partial class Form1 : Form  
    {  
        public Form1()  
        {  
            InitializeComponent();  
        }  
  
        private void SerializeShipInfoButton_Click(object sender, EventArgs e)  
        {  
            var fileName = "Ship1.json";  
              
            var (success, createException) = Mockups.singleShipInfo().ModelToJson(fileName);  
            if (success)  
            {  
                var (shippingInfo, readException) = Helpers.JsonToModel<ShippingInfo>(fileName);  
                MessageBox.Show(readException == null ? shippingInfo.ToString() : readException.Message);  
            }  
            else  
            {  
                MessageBox.Show(createException.Message);  
            }  
        }  
  
        private void SerializeShipInfoListButton_Click(object sender, EventArgs e)  
        {  
            var fileName = "ShipList.json";  
              
            var (success, createException) = Mockups.ShippingInfoList().ModelToJson(fileName);  
            if (success)  
            {  
                var (shippingInfos, readException) = Helpers.JsonToListModel<ShippingInfo>(fileName);  
                if (readException == null)  
                {  
                    var sb = new StringBuilder();  
                    shippingInfos.ForEach(item => sb.AppendLine(item.ToString()));  
                    MessageBox.Show(sb.ToString());  
                }  
                  
            }  
            else  
            {  
                MessageBox.Show(createException.Message);  
            }  
  
        }  
    }  
}  

single instance json

{  
  "AddressDetails": {  
    "Street": "1 Maple Drive",  
    "City": "Portland",  
    "State": "OR",  
    "PostalCode": "97666"  
  },  
  "FirstName": "Jim",  
  "LastName": "Adams",  
  "Gender": 0  
}  

list json

[  
  {  
    "AddressDetails": {  
      "Street": "1 Maple Drive",  
      "City": "Portland",  
      "State": "OR",  
      "PostalCode": "97666"  
    },  
    "FirstName": "Jim",  
    "LastName": "Adams",  
    "Gender": 0  
  },  
  {  
    "AddressDetails": {  
      "Street": "1 Maple Drive",  
      "City": "Portland",  
      "State": "OR",  
      "PostalCode": "97666"  
    },  
    "FirstName": "Mary",  
    "LastName": "Adams",  
    "Gender": 1  
  }  
]  

---

Answer 2

As the exception message says, your Json string has a format error. Please add a comma between the two objects.

          ......  
          'ont_province':'',  
          'ont_postalcode':''  
        },  
        {  
           'ont_addressline1':'2',  
           'ont_addressline2':'',  
           'ont_city':'2',  
           ......  

---

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