如果OWIN使用Ninject OWINHost自托管应用程序需要system.web吗？

Question

我正在尝试使用Ninject创建一个带有OWIN自托管WebAPI的Windows服务.我得到了它的工作,但我不得不添加对system.web的引用,这似乎是错误的.没有对system.web的引用我得到了这些编译错误:

"System.Web.Routing.RouteCollection"类型在未引用的程序集中定义.您必须添加对程序集'System.Web,Version = 4.0.0.0,Culture = neutral,PublicKeyToken = b03f5f7f11d50a3a'的引用.

类型'System.Web.Routing.Route'在未引用的程序集中定义.您必须添加对程序集'System.Web,Version = 4.0.0.0,Culture = neutral,PublicKeyToken = b03f5f7f11d50a3a'的引用.

根据本文设置OWIN WebApi应用程序添加Ninject之后出现错误

我还必须将Microsoft.Owin限制为版本2.1.0,以便Ninject工作.在服务启动期间,Ninject正在寻找Owin 2.1.0.如果你得到最新的Microsoft.Owin它将滚动到3.0.

我正在使用的三个主要NuGet包是:

Microsoft.AspNet.WebApi.OwinSelfHost

Ninject.Web.Common.OwinHost

Ninject.Web.WebApi.OwinHost

这是我的所有包(请注意Microsoft.Owin上的约束)

  <package id="Microsoft.AspNet.WebApi" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.2" targetFramework="net45" />
  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net45" allowedVersions="(,2.1]" />
  <package id="Microsoft.Owin.Host.HttpListener" version="3.0.0" targetFramework="net45" />
  <package id="Microsoft.Owin.Hosting" version="2.0.2" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" />
  <package id="Ninject" version="3.2.2.0" targetFramework="net45" />
  <package id="Ninject.Extensions.ContextPreservation" version="3.2.0.0" targetFramework="net45" />
  <package id="Ninject.Extensions.NamedScope" version="3.2.0.0" targetFramework="net45" />
  <package id="Ninject.Web.Common" version="3.2.2.0" targetFramework="net45" />
  <package id="Ninject.Web.Common.OwinHost" version="3.2.2.0" targetFramework="net45" />
  <package id="Ninject.Web.WebApi" version="3.2.1.0" targetFramework="net45" />
  <package id="Ninject.Web.WebApi.OwinHost" version="3.2.1.0" targetFramework="net45" />
  <package id="Owin" version="1.0" targetFramework="net45" />

这是Windows服务的Program.cs的样子

using Microsoft.Owin.Hosting;
using Ninject;
using Ninject.Web.Common.OwinHost;
using Ninject.Web.WebApi.OwinHost;
using Owin;
using System.Reflection;
using System.ServiceProcess;
using System.Web.Http;


namespace ServiceExample
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        static void Main()
        {
            ServiceBase[] ServicesToRun;
            ServicesToRun = new ServiceBase[] 
            { 
                new Service1() 
            };


            using (WebApp.Start<Startup>("http://localhost:12345"))
            {
                ServiceBase.Run(ServicesToRun);  
            }
        }



        public class Startup
        {
            public void Configuration(IAppBuilder app)
            {
                ConfigureWebAPI(app);

            }

            private void ConfigureWebAPI(IAppBuilder app)
            {
                var config = new HttpConfiguration();
                config.Routes.MapHttpRoute(
                    "DefaultApi",
                    "api/{controller}/{id}",
                    new {id = RouteParameter.Optional});

                app.UseNinjectMiddleware(CreateKernel).UseNinjectWebApi(config);
            }


            private static StandardKernel CreateKernel()
            {
                var kernel = new StandardKernel();
                kernel.Load(Assembly.GetExecutingAssembly());
                return kernel;
            }
        }
    }
}

Answer 1

尝试System.Web.Http.WebHost.dll从引用中删除.

当我想要一个API项目作为类库和单独的主机项目(一个使用控制台和其他IIS)时,我遇到了同样的问题,如本篇博客文章所述

问题是,当我执行Install-Package Microsoft.AspNet.WebApi安装ASP.NET Web API时,它还添加了引用,System.Web.Http.WebHost.dll结果packages.json是:

<packages>
  <package id="Microsoft.AspNet.WebApi" version="5.2.3" targetFramework="net452" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net452" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
</packages>

所以解决办法是删除参考System.Web.Http.WebHost.dll和删除Microsoft.AspNet.WebApi,并Microsoft.AspNet.WebApi.WebHost从packages.json这样就不会再次安装时一定会做的NuGet恢复/重装:

<packages>
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" />
  <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
</packages>

这是我packages.json的工作类库ASP.NET Web API项目:

<package id="Microsoft.AspNet.WebApi.Client" version="5.2.3" targetFramework="net452" />
<package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net452" />
<package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net452" />  
<package id="Microsoft.Owin" version="3.0.1" targetFramework="net452" />
<package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
<package id="Owin" version="1.0" targetFramework="net452" />