c# – ASP.NET 5 EntityFramework.Core 7.0.0-rc1-final问题 –
我有同样的问题.我在project.json文件中添加了以下依赖项:
"dependencies": { "EntityFramework": "7.0.0-beta4","EntityFramework.Core": "7.0.0-rc1-final","EntityFramework.SqlServer": "7.0.0-beta8","EntityFramework.Commands": "7.0.0-rc1-final" },"commands": { "web": "Microsoft.AspNet.Server.Kestrel","ef": "EntityFramework.Commands" },... 我用dnu安装EntityFramework和dnu安装EntityFramework.SqlServer来安装软件包. “EntityFramework”:“7.0.0-beta4”,由安装程序本身自动编写在依赖节点下. 问题1:令人惊讶的是,当我提到EntityFramework的智能化时,我提供的可用版本只有6.1.3! 问题2:当我使用dnu build编译我的应用程序(我在依赖项节点下手动添加EntityFramework程序集(.Core和.Commands)后运行dnu restore命令,我收到一堆编译错误: The type 'DbContextOptionsBuilder' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework.Core,Version=7.0.0.0,Culture=neutral,PublicKeyToken=null'. D:ProjectsaspnetapiserviceModelsSampleData.cs(12,41): DNXCore,Version=v5.0 error CS0308: The non-generic method 'IServiceProvider.GetService(Type)' cannot be used with type arguments D:ProjectsaspnetapiserviceModelsSampleData.cs(13,32): DNXCore,Version=v5.0 error CS0308: The non-generic method 'IServiceProvider.GetService(Type)' cannot be used with type arguments D:ProjectsaspnetapiserviceModelsSampleData.cs(14,29): DNXCore,Version=v5.0 error CS1061: 'object' does not contain a definition for 'Books' and no extension method 'Books' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) D:ProjectsaspnetapiserviceModelsSampleData.cs(15,42): DNXCore,Version=v5.0 error CS1061: 'object' does not contain a definition for 'Authors' and no extension method 'Authors' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) D:ProjectsaspnetapiserviceModelsSampleData.cs(17,43): DNXCore,Version=v5.0 error CS1061: 'object' does not contain a definition for 'Authors' and no extension method 'Authors' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) D:ProjectsaspnetapiserviceModelsSampleData.cs(19,45): DNXCore,Version=v5.0 error CS1061: 'object' does not contain a definition for 'Authors' and no extension method 'Authors' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) D:ProjectsaspnetapiserviceModelsSampleData.cs(22,Version=v5.0 error CS1061: 'object' does not contain a definition for 'Books' and no extension method 'Books' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) D:ProjectsaspnetapiserviceModelsSampleData.cs(61,Version=v5.0 error CS1061: 'object' does not contain a definition for 'SaveChanges' and no extension method 'SaveChanges' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) 如果我删除.Core和.Commands程序集引用项目构建正常. 然后我将EntityFramework.Core的版本更改为7.0.0.0,如错误所述: The type 'DbContextOptionsBuilder' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework.Core,PublicKeyToken=null'. 但是dnu恢复现在给了我以下内容: Unable to locate Dependency EntityFramework.Core >= 7.0.0 Writing lock file D:Projectsaspnetapiserviceproject.lock.json Restore complete,6675ms elapsed Errors in D:Projectsaspnetapiserviceproject.json Unable to locate Dependency EntityFramework.Core >= 7.0.0 我是一个新手在asp.net 5 Visual Studio代码平台.我不能使用Visual Studio 2015作为开发团队的其他成员使用OSX. 这是一个为我学习的项目.要求很简单.连接SQL Server数据库,使用实体框架来拉大师级关系数据. 搞砸了!帮帮我!! 提前致谢 UPDATE >我可以看到project.json对于版本7.0.0-rc1-final的所有软件包的重大变化.我使用Yeoman生成器工具来创建项目,但是看起来像是通过Visual Studio更正了包.那么,我必须手动更新软件包版本并恢复它们吗? 解决方法
您应该从依赖关系中删除“EntityFramework”(删除“EntityFramework”:“7.0.0-beta4”)并使用
"EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final","EntityFramework.MicrosoftSqlServer.Design": "7.0.0-rc1-final","EntityFramework.Commands": "7.0.0-rc1-final" 只要.如果添加“EntityFramework.MicrosoftSqlServer”:“7.0.0-rc1-final”,因为以下依赖关系,您不需要添加“EntityFramework.Core”:“7.0.0-rc1-final”:“7.0.0-rc1-final” "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final": "EntityFramework.Relational": "7.0.0-rc1-final": "EntityFramework.Core": "7.0.0-rc1-final" 我的意思是EntityFramework.MicrosoftSqlServer需要EntityFramework.Relational,这需要EntityFramework.Core. 您应该另外验证global.json包含“sdk”:{“version”:“1.0.0-rc1-update1”}. UPDATED:我检查了你上传的测试项目.它有很多小问题.我修改了您可以下载修改的项目here.不要忘记修复在appsettings.json中使用的ConnectionString,它包含我在我使用的服务器. 最重要的更改是使用更简单的BookContext.cs: using Microsoft.Data.Entity; namespace apiservice.Models { public class BookContext : DbContext { public DbSet<Author> Authors { get; set; } public DbSet<Book> Books { get; set; } } } 使用以下SampleData.cs using System; using System.Linq; using Microsoft.Data.Entity; using Microsoft.Extensions.DependencyInjection; namespace apiservice.Models { public static class SampleData { public static void Initialize(IServiceProvider serviceProvider) { var context=serviceProvider.GetService<BookContext>(); context.Database.Migrate(); if (!context.Books.Any()) { var austen = context.Authors.Add( new Author { LastName = "Austen",FirstName = "Jane" }).Entity; var dickens = context.Authors.Add( new Author { LastName = "Dickens",FirstName = "Charles" }).Entity; var cervantes = context.Authors.Add( new Author { LastName = "Cervantes",FirstName = "Miguel" }).Entity; context.Books.AddRange( new Book { Title = "Pride and Prejudice",Year = 1813,Author = austen,Price = 9.99M,Genre = "Comedy of manners" },new Book { Title = "Northanger Abbey",Year = 1817,Price = 12.95M,Genre = "Gothic parody" },new Book { Title = "David Copperfield",Year = 1850,Author = dickens,Price = 15,Genre = "Bildungsroman" },new Book { Title = "Don Quixote",Year = 1617,Author = cervantes,Price = 8.95M,Genre = "Picaresque" } ); context.SaveChanges(); } } } } 具有以下依赖项的project.json的用法部分: { "dependencies": { "Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final","Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final","Microsoft.AspNet.Mvc": "6.0.0-rc1-final","Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final","Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final","Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final","Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final","Microsoft.Extensions.Configuration.FileProviderExtensions": "1.0.0-rc1-final","Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final","Microsoft.Extensions.Logging": "1.0.0-rc1-final","Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final","Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final","Microsoft.Extensions.DependencyInjection": "1.0.0-rc1-final","Microsoft.Extensions.CodeGenerators.Mvc": "1.0.0-rc1-final","Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final","EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final","EntityFramework.Commands": "7.0.0-rc1-final","System.Net.Http": "4.0.1-beta-23516","Microsoft.Net.Http": "2.2.29","Newtonsoft.Json": "8.0.1" },"frameworks": { "dnx451": { },"dnxcore50": { } } } 固定appsettings.json从 { "Logging": { "IncludeScopes": false,"LogLevel": { "Default": "Verbose","System": "Information","Microsoft": "Information" },"Data": { "DefaultConnection":{ "ConnectionString": "Server=localhost;Database=BookStore;User Id=sa; Password=******;Trusted_Connection=true;" } } } } 至 { "Logging": { "IncludeScopes": false,"Microsoft": "Information" } },"Data": { "DefaultConnection": { "ConnectionString": "Server=localhost;Database=BookStore;User Id=sa; Password=******;Trusted_Connection=true;" } } } (数据不应该在日志记录下) 并使用以下Startup.cs using apiservice.Models; using Microsoft.AspNet.Builder; using Microsoft.AspNet.Hosting; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Logging; using Microsoft.Data.Entity; namespace apiservice { public class Startup { public static IConfigurationRoot Configuration {get; set;} public Startup(IHostingEnvironment env) { // Set up configuration sources. var builder = new ConfigurationBuilder() .AddJsonFile("appsettings.json") .AddJsonFile($"appsettings.{env.EnvironmentName}.json",optional: true) .AddEnvironmentVariables(); Configuration = builder.Build(); } // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { // Add framework services. services.AddEntityFramework() .AddSqlServer() .AddDbContext<BookContext>(options => options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]) ); services.AddMvc(); } public void Configure(IApplicationBuilder app,ILoggerFactory loggerFactory) { loggerFactory.AddConsole(Configuration.GetSection("Logging")); loggerFactory.AddDebug(); // we need to execute the following two commands before // dnu restore // dnx ef migrations add Initial // dnx ef database update // For more details on creating database during deployment see http://go.microsoft.com/fwlink/?LinkID=615859 try { using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>() .CreateScope()) { serviceScope.ServiceProvider.GetService<BookContext>() .Database.Migrate(); } } catch { } app.UseIISPlatformHandler(); app.UseStaticFiles(); app.UseMvc(routes => { routes.MapRoute( name: "default",template: "{controller=Home}/{action=Index}/{id?}"); }); SampleData.Initialize(app.ApplicationServices); } // Entry point for the application. public static void Main(string[] args) => WebApplication.Run<Startup>(args); } } 我在配置方法中的注释中写道,应该执行命令 dnx ef migrations add Initial dnx ef database update 所有包恢复后. dnx ef migrations add Initial将在项目中创建其他Migrations文件夹,其中包含像20160101205609_Initial.cs和BookContextModelSnapshot.cs这样的文件.在appsettings.json中定义的数据库将由dnx ef数据库更新创建,并且在使用该程序进行分组时将从SampleData.cs填充测试数据. 顺便说一句,我将package.json移动到包文件夹(与project.json相同的级别)内.您使用的包不是,但运动使得npm包可见和管理在Visual Studio中. 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