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

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未能加载类型 'Microsoft.Extensions.DependencyInjection.Extensions.ServiceCollectionExtensions' 从程序集“Microsoft.Extensions.DependencyInjection.Abstractions， 版本= 1.0.0.0，文化=中性公钥= adb9793829ddae60' 。在 Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.AddOptions（IServiceCollection 服务）在 Microsoft.Extensions.DependencyInjection.MvcCoreServiceCollectionExtensions.AddMvcCore（IServiceCollection 服务，行动setupAction）在 Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddMvc（IServiceCollection 服务，动作setupAction）在 POC.Startup.ConfigureServices（IServiceCollection服务）

System.Reflection.TargetInvocationException 异常已通过调用的目标引发异常 。在 System.RuntimeMethodHandle.InvokeMethod（对象目标，对象[] 参数，签名Sig，布尔构造函数）在 System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal（obj对象， 对象[]参数，对象[]参数）在 系统.Reflection.RuntimeMethodInfo.Invoke在 微软（obj对象，的BindingFlags invokeAttr，粘结剂粘结剂，对象[]参数，CultureInfo的培养物） 在 Microsoft.AspNetCore.Hosting.Internal.ConfigureServicesBuilder.Invoke（对象 例如，IServiceCollection exportServices） .AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices（） at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication（）

以下是我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"} 
       )); 
     } 
    } 
} 

我在启动时service.AddMvc（）线得到错误。 cs文件 请为此建议一个解决方案。

Answer 1

您是否尝试过使用这种依赖对MVC在project.json：

"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" 

这有可能是使用AspNetCore与AspNet为你的MVC的依赖导致冲突。