Question

在asp.net核心应用程序中，我正试图迁移EF代码拳头。

我收到了以下错误，

调用方法＆＃39; ConfigureServices＆＃39;时发生错误在启动时   class＆＃39; WebAppHandOn.Startup＆＃39;。考虑使用IDbContextFactory   在设计时覆盖DbContext的初始化。错误：   无法加载文件或程序集＆＃39; Microsoft.AspNetCore.Routing，   Version = 1.0.1.0，Culture = neutral，PublicKeyToken = adb9793829ddae60＆＃39;要么   其中一个依赖项。定位程序集的清单定义   与装配参考不匹配。（HRESULT的例外情况：   0x80131040）

在＆＃39; ApplicationDbContext＆＃39;上找不到无参数构造函数。   将无参数构造函数添加到＆＃39; ApplicationDbContext＆＃39;要么   添加＆＃39; IDbContextFactory＆＃39;的实现在   与＆＃39; ApplicationDbContext＆＃39;。
相同的程序集

以下是不同的代码文件

启动类

public void ConfigureServices(IServiceCollection services)
{
    // Add framework services.
    services.AddMvc();

    // Add EntityFramework's Identity support.
    services.AddEntityFramework();

    // Add ApplicationDbContext.
    services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]));
}

ApplicationDBContext Class

public class ApplicationDbContext : DbContext {
    #region Constructor

    public ApplicationDbContext(DbContextOptions options) : base(options)
    {
    }
    #endregion Constructor

    #region Methods
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
    }
    #endregion Methods

    #region Properties
    public DbSet<Item> Items { get; set; }
    public DbSet<Comment> Comments { get; set; }
    public DbSet<ApplicationUser> Users { get; set; }
    #endregion Properties
}

Project.json Class

＆＃13;

 {
      "dependencies": {
     "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Routing": "1.0.0",
    "Microsoft.AspNetCore.Authentication.JwtBearer": "1.0.0",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Newtonsoft.Json": "9.0.1",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final",
    "TinyMapper": "2.0.8"
  },

  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
  },

＆＃13;

Answer 1

检查yourproject.csproj文件，删除任何PackageReference标记中的任何预览版本，并使用manage NuGet包重新安装稳定版本。希望有所帮助

添加迁移时，asp.net核心和EF核心错误

1 个答案: