DataContractJsonSerializer: Serialize objects

Create a C# program that serialize and deserialize objects in JSON format. To do this, you can use the DataContractJsonSerializer class included in the System.Web.Extensions namespace.

First implement a Person class with three properties (Name, Age and City). The City class will have two properties (Name and Population). Then create a person object and use the serializer of the DataContractJsonSerializer object to save the data in file.json, later deserialize the file.json and print it on the screen. Remember to prepare a ToString() method to print the Person class.

Input

Output

Solution

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;

public class JSONDataContractJsonSerializer
{
    static string nameFile = "out.json";

    public static void Main(string[] args)
    {
        Person person = new Person(){ Name = "Nauj", Age = 26, 
            City = new City(){ Name = "Spain", Population = 13456766 } };

        Serialize(person);
        person = Deserialize();

        Console.WriteLine(person.ToString());
    }

    public static void Serialize(Person p)
    {
        DataContractJsonSerializer js = new DataContractJsonSerializer(typeof(Person));
        using (MemoryStream msObj = new MemoryStream())
        {
            js.WriteObject(msObj, p);
            msObj.Position = 0;
            using (StreamReader sr = new StreamReader(msObj))
            {
                string jsonData = sr.ReadToEnd();
                File.WriteAllText(nameFile, jsonData);
            }
        }
    }

    public static Person Deserialize()
    {
        DataContractJsonSerializer js = new DataContractJsonSerializer(typeof(Person));
        Person person;

        string jsonData = File.ReadAllText(nameFile);
        using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(jsonData)))
        {
            person = (Person)js.ReadObject(ms);
        }

        return person;
    }

    [DataContract]
    public class Person
    {
        [DataMember]
        public string Name { get; set; }

        [DataMember]
        public int Age { get; set; }

        [DataMember]
        public City City { get; set; }

        public override string ToString()
        {
            StringBuilder str = new StringBuilder();

            str.AppendLine("Name: " + Name);
            str.AppendLine("Age: " + Age);
            str.AppendLine("City: " + City.Name);

            return str.ToString();
        }
    }

    [DataContract]
    public class City
    {
        [DataMember]
        public string Name { get; set; }

        [DataMember]
        public int Population { get; set; }
    }
}