Question

我是Asp.Net Core的新手。在创建一个简单的MVC项目时，我遇到了以下错误。

System.TypeLoadException无法加载类型   ＆＃39; Microsoft.Extensions.DependencyInjection.Extensions.ServiceCollectionExtensions＆＃39;   来自assembly＆＃39; Microsoft.Extensions.DependencyInjection.Abstractions，   Version = 1.0.0.0，Culture = neutral，PublicKeyToken = adb9793829ddae60＆＃39;。在   Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.AddOptions（IServiceCollection   服务）   Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.AddMvcCore（IServiceCollection   服务，行动设置行动）   Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddMvc（IServiceCollection   服务，行动设置行动）   POC.Startup.ConfigureServices（IServiceCollection服务）

System.Reflection.TargetInvocationException   抛出异常   通过调用的目标。在   System.RuntimeMethodHandle.InvokeMethod（object target，Object []   参数，签名sig，bool构造函数）at   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal（object obj，   Object []参数，Object []参数）at   System.Reflection.RuntimeMethodInfo.Invoke（object obj，BindingFlags   invokeAttr，Binder binder，Object []参数，CultureInfo文化）   在   Microsoft.AspNetCore.Hosting.Internal.ConfigureServicesBuilder.Invoke（对象   实例，IServiceCollection exportServices）at   Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices（）   在Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication（）

以下是我的Project.json文件

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel":"1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.Core": "6.0.0-rc1-final"
  },

  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "web.config"
    ]
  },

  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

以下是我的Startup.cs文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNet.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.DependencyInjection;

namespace POC
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app)
        {
            app.UseMvc( m=> 
            m.MapRoute(
                name:"Default",
                template:"{controller}/{action}/{id?}",
                defaults:new { controller="Home", action="index"}
                ));
        }
    }
}

我确实在startup.cs文件的service.AddMvc()行收到错误。请为此建议解决方案。

Answer 1

您是否尝试在 project.json 中使用此依赖关系MVC：

"Microsoft.AspNetCore.Mvc": "1.0.0"

而不是这些？

"Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
"Microsoft.AspNet.Mvc.Core": "6.0.0-rc1-final"

将AspNetCore和AspNet用于MVC依赖关系可能会导致冲突。

ASP.NET Core System.TypeLoadException DependencyInjection.Extensions.ServiceCollectionExtensions错误

1 个答案: