在不使用 RouteAttribute 的情况下使用 ApiControllerAttribute

Question

在 ASP.NET Core (v 2.1.5) 中，您可以创建控制器，而无需让它们继承自 Controller class（如您所知）。如果这样做，则必须使用 RouteAttribute 来定义路线。但是，如果我们可以将隐式路由（而不是属性路由）与 ApiController 属性一起使用，我很感兴趣。示例：在 Startup.cs:

中具有此隐式路由

app.UseMvc(routeBuilder => 
{
    routeBuilder.MapRoute("api_default", "{controller}/{action}/{id?}");
});

还有这个Cotroller

[ApiController]
public class ValuesController 
{
    [HttpGet] 
    public string Get(int id) => id.ToString();
}

会抛出这个异常：

InvalidOperationException: Action 'TestApi.Controllers.ValuesController.Get' does not have an attribute route. Action methods on controllers annotated with ApiControllerAttribute must be attribute routed.

有没有办法避免异常？

Answer 1

But, I'm interested if we can use implicit routing (and not attribute routing) along with ApiController attribute together.

根据官方文档

Attribute routing becomes a requirement. For example:

[Route("api/[controller]")]
[ApiController]
public class ValuesController 

Actions are inaccessible via conventional routes defined in UseMvc or by UseMvcWithDefaultRoute in Startup.Configure.

注：强调我的

引用Build web APIs with ASP.NET Core: Attribute routing requirement