C# 開発で動的ページと RESTful API を扱う方法

// Default.aspx.cs
using System;
using System.Web.UI;

public partial class _Default : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("<h1>Hello world!</h1>");
    }
}

// ProductsController.cs
using System.Collections.Generic;
using System.Web.Http;

public class ProductsController : ApiController
{
    private static List<string> products = new List<string>
    {
        "Product 1",
        "Product 2",
        "Product 3"
    };

    public IEnumerable<string> Get()
    {
        return products;
    }

    public void Post([FromBody] string product)
    {
        products.Add(product);
    }

    public void Put(int id, [FromBody] string product)
    {
        products[id] = product;
    }

    public void Delete(int id)
    {
        products.RemoveAt(id);
    }
}

// Default.aspx.cs
using System;
using System.Web.UI;

public partial class _Default : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("<h1>Dynamic Page</h1>");

        // Call RESTful API
        var apiClient = new System.Net.WebClient();
        string apiUrl = "https://api.example.com/products";
        string apiResponse = apiClient.DownloadString(apiUrl);
        Response.Write($"<p>API Response: {apiResponse}</p>");
    }
}