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c# - GlobalConfiguration.Configure(WebApiConfig.Register) 和 Umbraco 的问题

问题描述

我有一个 Umbraco 项目和一个使用 Umbraco 的 WebApi 项目。我已经安装了第二个 UmbracoCms.Core 并且我有一个控制器是 UmbracoAppiController

 public class TestController : UmbracoApiController
    {
        
        [HttpGet]
        public IEnumerable<string> GetAll()
        {
            return new string[] { "value1", "value2" };
        }
}

我有 global.asax.cs：

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

和 WebApiConfig.cs：

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 }
            );
        }
    }

当我尝试进行 WebApi 调用时，我得到：

Server Error in '/' Application.

Object reference not set to an instance of an object.  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error: 


Line 17:             // Code that runs on application startup Line 18: AreaRegistration.RegisterAllAreas(); Line 19:             GlobalConfiguration.Configure(WebApiConfig.Register); Line 20:         RouteConfig.RegisterRoutes(RouteTable.Routes);             Line 21:    }

Source File: C:\Projects\SBSADeviceShop5\ShopApi1\Global.asax.cs    Line: 19 

Stack Trace: 


[NullReferenceException: Object reference not set to an instance of an object.]    Umbraco.Web.WebApi.UnhandledExceptionLogger..ctor() +12    Umbraco.Web.WebApi.UnhandedExceptionLoggerConfigurationAttribute.Initialize(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor) +66 System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type) +188    System.Web.Http.Controllers.HttpControllerDescriptor.InvokeAttributesOnControllerType(HttpControllerDescriptor controllerDescriptor, Type type) +62    System.Web.Http.Controllers.HttpControllerDescriptor..ctor(HttpConfiguration configuration, String controllerName, Type controllerType) +130    System.Web.Http.Dispatcher.DefaultHttpControllerSelector.InitializeControllerInfoCache()
+568    System.Lazy`1.CreateValue() +708    System.Lazy`1.LazyInitValue() +184    System.Web.Http.Dispatcher.DefaultHttpControllerSelector.GetControllerMapping()
+18    System.Web.Http.Routing.AttributeRoutingMapper.AddRouteEntries(SubRouteCollection collector, HttpConfiguration configuration, IInlineConstraintResolver constraintResolver, IDirectRouteProvider directRouteProvider) +76    System.Web.Http.Routing.<>c__DisplayClass1_1.<MapAttributeRoutes>b__1()
+75    System.Web.Http.Routing.RouteCollectionRoute.EnsureInitialized(Func`1 initializer) +66    System.Web.Http.Routing.<>c__DisplayClass1_0.<MapAttributeRoutes>b__0(HttpConfiguration config) +125    ShopApi1.Global.Application_Start(Object sender, EventArgs e) in C:\Projects\SBSADeviceShop5\ShopApi1\Global.asax.cs:19

[HttpException (0x80004005): Object reference not set to an instance of an object.]    System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +520    System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +176    System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +165    System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +267    System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +341

[HttpException (0x80004005): Object reference not set to an instance of an object.]    System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +523    System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context)
+107    System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +688


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3160.0

标签： c#asp.net-web-apiumbraco

解决方案

您根本不需要执行Global.asax.csorWebApiConfig.cs文件 - 如果您从UmbracoApiControlleror继承，路由将由 Umbraco 自动处理SurfaceController。

阅读 our.umbraco.com 上的路由文档，特别是有关 WebApi 的部分：

https://our.umbraco.com/documentation/Reference/Routing/WebApi

基于此，您的 TestController 路由将如下所示：

~/Umbraco/Api/Test/GetAll

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