บทนำสู่ JSON และ XML

JSON คืออะไร

{
  "name": "Alice",
  "age": 25,
  "city": "New York"
}

การทำงานกับ JSON ใน C#

using System;
using System.Text.Json;

class Program {
    static void Main() {
        string json = "{\"name\":\"Alice\",\"age\":25,\"city\":\"New York\"}";

        // Deserialize JSON to an object
        var person = JsonSerializer.Deserialize<Person>(json);
        Console.WriteLine($"Name: {person.Name}, Age: {person.Age}, City: {person.City}");

        // Serialize an object to JSON
        string newJson = JsonSerializer.Serialize(person);
        Console.WriteLine("Serialized JSON: " + newJson);
    }
}

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

XML คืออะไร

  Alice
  25
  New York

การทำงานกับ XML ใน C#

using System;
using System.Xml.Serialization;
using System.IO;

class Program {
    static void Main() {
        string xml = "<Person><Name>Alice</Name><Age>25</Age><City>New York</City></Person>";

        // Deserialize XML to an object
        var serializer = new XmlSerializer(typeof(Person));
        using (var reader = new StringReader(xml)) {
            var person = (Person)serializer.Deserialize(reader);
            Console.WriteLine($"Name: {person.Name}, Age: {person.Age}, City: {person.City}");
        }

        // Serialize an object to XML
        var newPerson = new Person { Name = "Bob", Age = 30, City = "San Francisco" };
        using (var writer = new StringWriter()) {
            serializer.Serialize(writer, newPerson);
            Console.WriteLine("Serialized XML: " + writer.ToString());
        }
    }
}

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

JSON เทียบกับ XML

โจทย์ฝึกปฏิบัติ

using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Xml.Serialization;
using System.IO;

class Program {
    static void Main() {
        var people = new List<Person> {
            new Person { Name = "Alice", Age = 25, City = "New York" },
            new Person { Name = "Bob", Age = 30, City = "San Francisco" }
        };

        // Serialize to JSON
        string json = JsonSerializer.Serialize(people);
        Console.WriteLine("JSON:\n" + json);

        // Serialize to XML
        var serializer = new XmlSerializer(typeof(List<Person>));
        using (var writer = new StringWriter()) {
            serializer.Serialize(writer, people);
            Console.WriteLine("XML:\n" + writer.ToString());
        }
    }
}

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

แนวทางปฏิบัติที่ดีสำหรับ JSON และ XML

ทบทวน JSON และ XML