Question

我正在运行MVC 6和EF 7并且已经更改了我的模型并希望运行该应用程序，但是我收到错误并且不清楚根本原因是什么。

下面的

是我的project.json

的片段

"dependencies": {
"EntityFramework.Commands": "7.0.0-beta5",
"EntityFramework.SqlServer": "7.0.0-beta5",
"Microsoft.AspNet.Antiforgery": "1.0.0-beta6",
"Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Google": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-beta5",
"Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta5",
"Microsoft.AspNet.Diagnostics": "1.0.0-beta5",
"Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta5",
"Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta5",
"Microsoft.AspNet.Mvc": "6.0.0-beta5",
"Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta5",
"Microsoft.AspNet.Server.IIS": "1.0.0-beta5",
"Microsoft.AspNet.Server.WebListener": "1.0.0-beta5",
"Microsoft.AspNet.Session": "1.0.0-beta6",
"Microsoft.AspNet.StaticFiles": "1.0.0-beta5",
"Microsoft.AspNet.Tooling.Razor": "1.0.0-beta5",
"Microsoft.Framework.Configuration.Abstractions": "1.0.0-beta5",
"Microsoft.Framework.Configuration.Json": "1.0.0-beta5",
"Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta5",
"Microsoft.Framework.Logging": "1.0.0-beta5",
"Microsoft.Framework.Logging.Console": "1.0.0-beta5",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta5"
},

以下是网页错误。

system.missingMethodException而找不到方法：'Boolean Microsoft.Framework.DependencyInjection.ServiceCollectionExtensions.TryAdd（Microsoft.Framework.DependencyInjection.IServiceCollection，Microsoft.Framework.DependencyInjection.ServiceDescriptor）。在Microsoft.Framework.DependencyInjection.LoggingServiceCollectionExtensions.AddLogging（IServiceCollection服务）在Microsoft.AspNet.Hosting.WebHostBuilder.BuildHostingServices（）在Microsoft.AspNet.Hosting.WebHostBuilder.Build（）在Microsoft.AspNet.Loader.IIS.RuntimeHttpApplication.ApplicationStart（IHttpApplication应用程序）在Microsoft.AspNet.Loader.IIS.HttpApplicationBase.InvokeApplicationStart（IHttpApplication application）

Answer 1

从一个测试版到另一个测试版有很多重大变化。

因此我建议您将project.json中的所有版本与beta5或beta6对齐。

添加依赖项并更新模型类后，使用EF 7运行应用程序时出错

1 个答案: