"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:\Projects\aspnet\APIservice\Models\SampleData.cs(12,41): DNxcore,Version=v5.0 error CS0308: The non-generic method 'IServiceProvIDer.GetService(Type)' cannot be used with type argumentsD:\Projects\aspnet\APIservice\Models\SampleData.cs(13,32): DNxcore,Version=v5.0 error CS0308: The non-generic method 'IServiceProvIDer.GetService(Type)' cannot be used with type argumentsD:\Projects\aspnet\APIservice\Models\SampleData.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:\Projects\aspnet\APIservice\Models\SampleData.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:\Projects\aspnet\APIservice\Models\SampleData.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:\Projects\aspnet\APIservice\Models\SampleData.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:\Projects\aspnet\APIservice\Models\SampleData.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:\Projects\aspnet\APIservice\Models\SampleData.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 >= 7.0.0Writing lock file D:\Projects\aspnet\APIservice\project.lock.JsonRestore complete,6675ms elapsedErrors in D:\Projects\aspnet\APIservice\project.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？
>当项目由Yeoman创建/生成时,默认情况下没有添加global.Json文件.我可以手动添加这个代码吗？这会工作吗
>我还可以看到一些额外的包引用被添加到project.Json文件,默认情况下没有被Yeoman生成器添加 – 如Microsoft.AspNet.Tooling.Razor,Microsoft.Extensions.Logging.Console,Microsoft.Extensions.Logging.DeBUG,Microsoft.Extensions.Logging等.这些项目是否都被有效地使用？因为生成器没有自动添加它们,可以再次手动添加它们,并使用dnu还原进行还原？如果我们手动添加,这会对项目有任何影响吗？
"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 Initialdnx 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.
总结以上是内存溢出为你收集整理的c# – ASP.NET 5 EntityFramework.Core 7.0.0-rc1-final问题 – 编译器想要7.0.0.0被引用,没有找到全部内容，希望文章能够帮你解决c# – ASP.NET 5 EntityFramework.Core 7.0.0-rc1-final问题 – 编译器想要7.0.0.0被引用,没有找到所遇到的程序开发问题。
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