c# - 如何使用 MVC 6 解决 System.InvalidOperationException - 相同的模板

Question

一般来说，我是 ASP.NET 的新手，最近遇到了这个我在网上找不到的错误(可能是因为最近发布的 MVC 6？)

System.InvalidOperationException The following errors occurred with attribute routing information:

错误 1:

Attribute routes with the same name 'GetByIdRoute' must have the same template: Action: 'Appname.Web.Controllers.MemberController.GetById' - Template: 'api/Member/{id:int}' Action: 'Appname.Web.Controllers.PaymentController.GetById' - Template: 'api/Payment/{id:int}' Action: 'Appname.Web.Controllers.PlanController.GetById' - Template: 'api/Plan/{id:int}'

这为 startup.cs 提供了一个代码片段

Line 73:  
Line 74:              // Add MVC to the request pipeline.
Line 75:              app.UseMvc(routes =>
Line 76:              {
Line 77:                  routes.MapRoute(

突出显示第 75 行

还有这个:

at Microsoft.AspNet.Mvc.ControllerActionDescriptorBuilder.Build(ApplicationModel application) 
at Microsoft.AspNet.Mvc.Core.ControllerActionDescriptorProvider.GetDescriptors() 
at Microsoft.AspNet.Mvc.Core.ControllerActionDescriptorProvider.OnProvidersExecuting(ActionDescriptorProviderContext context) 
at Microsoft.AspNet.Mvc.Core.DefaultActionDescriptorsCollectionProvider.GetCollection() 
at Microsoft.AspNet.Mvc.Core.DefaultActionDescriptorsCollectionProvider.get_ActionDescriptors() 
at Microsoft.AspNet.Mvc.Routing.AttributeRoute.GetInnerRoute() 
at Microsoft.AspNet.Mvc.Routing.AttributeRoute..ctor(IRouter target, IActionDescriptorsCollectionProvider actionDescriptorsCollectionProvider, IInlineConstraintResolver constraintResolver, ILoggerFactory loggerFactory) 
at Microsoft.AspNet.Mvc.Routing.AttributeRouting.CreateAttributeMegaRoute(IRouter target, IServiceProvider services) 
at Microsoft.AspNet.Builder.BuilderExtensions.UseMvc(IApplicationBuilder app, Action<IRouteBuilder> configureRoutes) 
at Appname.Web.Startup.Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerfactory) in ... Startup.cs:line 75

Answer 1

您可以指定路由名称。

In Web API, every route has a name. Route names are useful for generating links, so that you can include a link in an HTTP response.

http://www.asp.net/web-api/overview/web-api-routing-and-actions/attribute-routing-in-web-api-2#route-names

    [HttpGet("{id}", Name = "GetPerson")]
    public IActionResult Get(int id)
    {
        var item = this.PeopleRepository.GetById(id);

        if (item == null)
        {
            return this.HttpNotFound();
        }

        return new ObjectResult(item);
    }

通过这样做，您可以拥有另一个具有相同操作名称(但不同路由名称)的 Controller

    [HttpGet("{id}", Name = "GetPurchase")]
    public IActionResult Get(int id)
    {
        var item = this.PurchaseRepository.GetById(id);

        if (item == null)
        {
            return this.HttpNotFound();
        }

        return new ObjectResult(item);
    }