c# - 无法在 MVC 项目中访问 Web API 2 Controller

Question

我无法使用我在 MVC 项目中使用 ASP.Net Web API 2 Controller 编写的 API。

localhost:57323/api/billpayment/getbillers/10 有效，但 localhost:57323/api/billpayment/getbillers 无效。

WebAPI.config

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

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

Global.asax

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        GlobalConfiguration.Configure(WebApiConfig.Register);
    }
}

Answer 1

由于路由的配置方式，您遇到了路由冲突。

Web API 路由需要在标准 MVC 路由之前添加到路由表中。

更新

public class MvcApplication : System.Web.HttpApplication {
    protected void Application_Start() {
        AreaRegistration.RegisterAllAreas();
        GlobalConfiguration.Configure(WebApiConfig.Register); //<-- This MUST come before
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes); //<-- THIS to avoid conflicts
        BundleConfig.RegisterBundles(BundleTable.Bundles);        
    }
}