Question

我有一个包含Web API的ASP.NET Webforms网站。该站点在Windows 8上使用Visual Studio 2013和.NET 4.5进行开发和测试，并使用IIS Express作为Web服务器。

我在根目录中添加了Web Api控制器，其定义如下：

[RoutePrefix("api")]
public class ProductsController : ApiController
{
    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 } 
    };
    [Route("ProductsController")]
    [HttpGet]
    public IEnumerable<Product> GetAllProducts()
    {
        return products;
    }

    public Product GetProductById(int id)
    {
        var product = products.FirstOrDefault((p) => p.Id == id);
        if (product == null)
        {
            throw new HttpResponseException(HttpStatusCode.NotFound);
        }
        return product;
    }

    public IEnumerable<Product> GetProductsByCategory(string category)
    {
        return products.Where(
            (p) => string.Equals(p.Category, category,
                StringComparison.OrdinalIgnoreCase));
    }
}

Global.asax看起来像这样：

public class Global : HttpApplication
{
    void Application_Start(object sender, EventArgs e)
    {
        // Code that runs on application startup
        AreaRegistration.RegisterAllAreas();
        RouteConfig.RegisterRoutes(RouteTable.Routes);


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

    }
}

我已将这两行包含在我的web.config文件中

<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true"/>

当我使用以下Url http://localhost:5958/api/products发出get请求时，我收到HTTP错误404.0。我尝试了不同的解决方案但没有任何效果有什么东西我不见了吗？我该如何纠正这个问题？

提前致谢。

Answer 1

您为Web api混合了一些基于约定的属性和属性路由。

Attribute Routing in ASP.NET Web API 2

如果您要使用属性路由，则需要正确add the routes到控制器。

[RoutePrefix("api/products")]
public class ProductsController : ApiController
{
    //...code removed for brevity

    //eg: GET /api/products
    [HttpGet]
    [Route("")]
    public IEnumerable<Product> GetAllProducts(){...}

    //eg: GET /api/products/2
    [HttpGet]
    [Route("{id:int}")]
    public Product GetProductById(int id){...}

    //eg: GET /api/products/categories/Toys
    [HttpGet]
    [Route("categories/{category}")]
    public IEnumerable<Product> GetProductsByCategory(string category){...}
}

现在您已正确定义路线，您需要enable attribute routing。

WebApiConfig.cs

public static class WebApiConfig {
    public static void Register(HttpConfiguration config) {

        // Enable attribute routing
        config.MapHttpAttributeRoutes();

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

请务必将Global.asax代码更新为以下内容：

public class Global : HttpApplication {
    void Application_Start(object sender, EventArgs e) {
        //ASP.NET WEB API CONFIG
        // Pass a delegate to the Configure method.
        GlobalConfiguration.Configure(WebApiConfig.Register);

        // Code that runs on application startup
        AreaRegistration.RegisterAllAreas();
        RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
}

WebForm的RouteConfig

public static class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        var settings = new FriendlyUrlSettings();
        settings.AutoRedirectMode = RedirectMode.Permanent;
        routes.EnableFriendlyUrls(settings);
    }
}

资源：

Can you use the attribute-based routing of WebApi 2 with WebForms?

Answer 2

根据您的代码，您没有包含webapi的路由。如果从Nuget安装Webapi，您可以在App_Start下找到包含WebApi的Route配置的 WebApiConfig 文件。如果没有为webapi创建新的路由配置文件

using System.Web.Http;
public static class WebApiConfig
{
    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 }
        );
    }
}

在Global.ascx中使用此静态方法。

using System.Web.Http;
 void Application_Start(object sender, EventArgs e)
    {

        GlobalConfiguration.Configure(WebApiConfig.Register);
        // Code that runs on application startup
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
    }

在Webforms中使用Web Api返回404错误

2 个答案: