了解WebApi如何路由请求

Question

我是WebApi的新手，我遵循了以下教程https://www.asp.net/web-api/overview/getting-start-with-aspnet-web-api/tutorial-your-first-web-api

一切都按预期工作--我有两个endpoint

api/products
api/products/id

我试图理解的是它们如何与控制器中定义的方法相关联。

public static void Register(HttpConfiguration config)
{
    // Web API configuration and services

    // Web API routes
    config.MapHttpAttributeRoutes();

    config.Routes.MapHttpRoute(
        name: "DefaultApi",
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );
}

控制器：

Product[] products = new Product[]
{
    new Product { Id = 1, Name = "Tomato Soup", Category = "Groceries", Price = 1 },
    new Product { Id = 2, Name = "Yo-yo", Category = "Toys", Price = 3.75M },
    new Product { Id = 3, Name = "Hammer", Category = "Hardware", Price = 16.99M }
};

public IEnumerable<Product> GetAllProducts()
{
    return products;
}

public IHttpActionResult GetProduct(int id)
{
    var product = products.FirstOrDefault((p) => p.Id == id);
    if (product == null)
    {
        return NotFound();
    }
    return Ok(product);
}

Answer 1

我想你会发现这个链接非常有启发性：

https://www.asp.net/web-api/overview/web-api-routing-and-actions/routing-and-actions-selection

要选择一个操作，它将查看以下内容：