Question

我正在尝试制作.NET核心Web应用程序，当我构建解决方案时，出现以下错误提示，请帮帮我。

它还显示有关程序包兼容性的错误这一切都是在我更新图书馆后发生的

我尝试更改csproj文件中的版本号，但是它会产生更多错误帮我解决这个问题

输出标签中的错误

Exception thrown: 'System.InvalidOperationException' in Microsoft.AspNetCore.Identity.EntityFrameworkCore.dll
An exception of type 'System.InvalidOperationException' occurred in Microsoft.AspNetCore.Identity.EntityFrameworkCore.dll but was not handled in user code
AddEntityFrameworkStores can only be called with a user that derives from IdentityUser<TKey>.

Startup.cs文件

{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });


            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
            services.AddDbContext<MyContext>(options => options.UseSqlServer(Configuration["ConnectionStrings:DefaultConnection"]));
            services.AddIdentity<Customer, ApplicationRole>()
                .AddEntityFrameworkStores<MyContext>()
                .AddDefaultTokenProviders();

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();
            app.UseIdentity();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");

                //Admin area routes
                routes.MapRoute(
                    name: "AdminAreaRoute",
                    template: "{area:exists}/{controller=Products}/{action=Index}/{id?}");
            });
        }
    }
}

我也收到此错误

1>D:\Projects\Ghost- depricated\Ghost\Ghost.csproj : warning NU1701: Package 'EntityFramework 6.2.0' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project.
1>D:\Projects\Ghost- depricated\Ghost\Ghost.csproj : warning NU1701: Package 'Microsoft.AspNet.Identity.AspNetCoreCompat 0.3.4' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project.
1>D:\Projects\Ghost- depricated\Ghost\Ghost.csproj : warning NU1701: Package 'Microsoft.AspNet.Identity.Core 2.2.2' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project.
1>D:\Projects\Ghost- depricated\Ghost\Ghost.csproj : warning NU1701: Package 'Microsoft.AspNet.Identity.EntityFramework 2.2.2' was restored using '.NETFramework,Version=v4.6.1' instead of the project target framework '.NETCoreApp,Version=v2.2'. This package may not be fully compatible with your project.

Answer 1

尝试卸载EntityFramework 6.2.0，然后安装Microsoft.EntityFrameworkCore软件包：

在包管理器控制台中执行Install-Package Microsoft.EntityFrameworkCore -Version 2.2.6命令

或手动安装：

右键单击项目>管理nuget软件包...>浏览选项卡>键入Microsoft.EntityFrameworkCore，然后安装它

Microsoft.AspNetCore.Identity.EntityFrameworkCore.dll

1 个答案: