C# “无法打开数据库”；“身份”；由登录请求。登录失败。用户登录失败'；桌面\用户'；

所以当我试着运行我的项目时，我得到了这个错误。。。这个项目是我的一个小组成员发给我的

无法打开登录请求的数据库“标识”。登录失败。 用户“”的登录失败

该项目本身是一个使用MVC的web应用程序。我们有一个俱乐部/球员名单数据库。我目前所做的只是运行它，看看我的小组完成了什么，但它一直向我显示上面的错误。我已经在网上搜索了很多次，但都没有结果，这就是为什么我在这里发帖寻求帮助的原因

以下是：

IdentitySeedData.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection;

namespace P0.Models
{
    public static class IdentitySeedData
    {
        private const string adminUser = "Admin";
        private const string adminPassword = "Secret123$";
        public static async void EnsurePopulated(IApplicationBuilder app)
        {
            UserManager<IdentityUser> userManager = app.ApplicationServices
                .GetRequiredService<UserManager<IdentityUser>>();

            IdentityUser user = await userManager.FindByNameAsync(adminUser);

            if (user == null)
            {
                user = new IdentityUser("Admin");
                await userManager.CreateAsync(user);
            }
        }
    }
}

---

您的应用程序正在使用到SQL Server数据库的“受信任连接”。因此，它正在尝试使用计算机的当前用户登录

您需要进入SQL Server对象资源管理器或SQL Server Management Studio，并将“桌面\用户”添加为SQL Server的登录名和数据库中的用户

以下是步骤

添加用户页面的屏幕截图

---

确保进入“用户映射”选项卡并勾选要使用的数据库。如果这是开发，您可以勾选“db_owner”，这样您就拥有了所有权限。

谢谢您的帮助。我不想在没有发布我为解决问题所做的事情的情况下将此标记为已解决

我通过SQL server对象资源管理器手动将数据库添加到服务器中，并在Package Manager控制台中执行以下操作，从而获得了修复：

update-database Initial -context AppIdentityDBContext

然后是对服务器/数据库的SQL查询：

CREATE TABLE [dbo].[AspNetRoles] (
    [Id]                NVARCHAR(256) NOT NULL,
    [ConcurrencyStamp]  NVARCHAR(MAX) NULL,
    [Name]              NVARCHAR(256) NULL,
    [NormalizedName]    NVARCHAR(256) NULL,
    CONSTRAINT [PK_AspNetRoles] PRIMARY KEY ([Id])
);

CREATE TABLE [dbo].[AspNetUsers] (
[Id]                   NVARCHAR (256) NOT NULL,
[AccessFailedCount]    INT            NOT NULL,
[ConcurrencyStamp]     NVARCHAR (MAX) NULL,
[Email]                NVARCHAR (256) NULL,
[EmailConfirmed]       BIT            NOT NULL,
[LockoutEnabled]       BIT            NOT NULL,
[LockoutEnd]           DATETIME       NULL,
[NormalizedEmail]      NVARCHAR (256) NULL,
[NormalizedUserName]   NVARCHAR (256) NULL,
[PasswordHash]         NVARCHAR (MAX) NULL,
[PhoneNumber]          NVARCHAR (MAX) NULL,
[PhoneNumberConfirmed] BIT            NOT NULL,
[SecurityStamp]        NVARCHAR (MAX) NULL,
[TwoFactorEnabled]     BIT            NOT NULL,
[UserName]             NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUsers] PRIMARY KEY CLUSTERED ([Id] ASC)
);

CREATE TABLE [dbo].[AspNetRoleClaims] (
[Id]         INT            IDENTITY (1, 1) NOT NULL,
[ClaimType]  NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
[RoleId]     NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetRoleClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_AspNetRoleClaims_AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserClaims] (
[Id]         INT            IDENTITY (1, 1) NOT NULL,
[ClaimType]  NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
[UserId]     NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_AspNetUserClaims_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserLogins] (
[LoginProvider] NVARCHAR (128) NOT NULL,
[ProviderKey]   NVARCHAR (128) NOT NULL,
[ProviderDisplayName]   NVARCHAR (128) NULL,
[UserId]        NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserLogins] PRIMARY KEY CLUSTERED ([LoginProvider] ASC, [ProviderKey] ASC, [UserId] ASC),
CONSTRAINT [FK_AspNetUserLogins_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserRoles] (
[UserId]    NVARCHAR (256) NOT NULL,
[RoleId]    NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserRoles] PRIMARY KEY CLUSTERED ([UserId] ASC, [RoleId] ASC),
CONSTRAINT [FK_AspNetUserRoles_AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE,
CONSTRAINT [FK_AspNetUserRoles_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
 );

CREATE TABLE [dbo].[AspNetUserTokens] (
[UserId]    NVARCHAR (256) NOT NULL,
[LoginProvider] NVARCHAR (256) NOT NULL,
[Name]  NVARCHAR (256) NOT NULL,
[Value] NVARCHAR (MAX) NOT NULL,
CONSTRAINT [PK_AspNetUserTokens] PRIMARY KEY CLUSTERED ([UserId] ASC, [LoginProvider] ASC, [Name] ASC),
CONSTRAINT [FK_AspNetUserTokens_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
 );

GO
CREATE NONCLUSTERED INDEX [IX_AspNetRoleClaims_RoleId]
ON [dbo].[AspNetRoleClaims]([RoleId] ASC);

GO
CREATE UNIQUE NONCLUSTERED INDEX [RoleNameIndex]
ON [dbo].[AspNetRoles]([NormalizedName] ASC)
WHERE [NormalizedName] IS NOT NULL;

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserClaims_UserId]
ON [dbo].[AspNetUserClaims]([UserId] ASC);

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserLogins_UserId]
ON [dbo].[AspNetUserLogins]([UserId] ASC);

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserRoles_RoleId]
ON [dbo].[AspNetUserRoles]([RoleId] ASC);

GO
CREATE NONCLUSTERED INDEX [EmailIndex]
ON [dbo].[AspNetUsers]([NormalizedEmail] ASC);

GO
CREATE UNIQUE NONCLUSTERED INDEX [UserNameIndex]
ON [dbo].[AspNetUsers]([NormalizedUserName] ASC)
WHERE [NormalizedUserName] IS NOT NULL;

---

从您的屏幕截图来看，您似乎没有导致错误的标识数据库。请添加迁移和更新数据库以创建数据库。请参阅：

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using P0.Models;
using Microsoft.Extensions.Configuration;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Identity;

namespace P0
{
    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.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(
                    Configuration["Data:ConnectionStrings:SoccerClubs"]));
            services.AddDbContext<AppIdentityDbContext>(options =>
                options.UseSqlServer(
                    Configuration["Data:ConnectionStrings:AppIdentityDbContext"]));
            services.AddIdentity<IdentityUser, IdentityRole>()
                .AddEntityFrameworkStores<AppIdentityDbContext>()
                .AddDefaultTokenProviders();
            services.AddTransient<IClubRepository, EFClubRepository>();
            services.AddTransient<IPlayerRepository, EFPlayerRepository>();
            services.AddMvc();
        }

        // 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();
            }

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

{
  "Data": {
    "ConnectionStrings": {
      "SoccerClubs": "Server=(localdb)\\MSSQLLocalDB;Database=SoccerClubs;Trusted_Connection=True;MultipleActiveResultSets=true",
      "AppIdentityDbContext": "Server=(localdb)\\MSSQLLocalDB;Database=Identity;Trusted_Connection=True;MultipleActiveResultSets=true"
    }
    }
}

update-database Initial -context AppIdentityDBContext

CREATE TABLE [dbo].[AspNetRoles] (
    [Id]                NVARCHAR(256) NOT NULL,
    [ConcurrencyStamp]  NVARCHAR(MAX) NULL,
    [Name]              NVARCHAR(256) NULL,
    [NormalizedName]    NVARCHAR(256) NULL,
    CONSTRAINT [PK_AspNetRoles] PRIMARY KEY ([Id])
);

CREATE TABLE [dbo].[AspNetUsers] (
[Id]                   NVARCHAR (256) NOT NULL,
[AccessFailedCount]    INT            NOT NULL,
[ConcurrencyStamp]     NVARCHAR (MAX) NULL,
[Email]                NVARCHAR (256) NULL,
[EmailConfirmed]       BIT            NOT NULL,
[LockoutEnabled]       BIT            NOT NULL,
[LockoutEnd]           DATETIME       NULL,
[NormalizedEmail]      NVARCHAR (256) NULL,
[NormalizedUserName]   NVARCHAR (256) NULL,
[PasswordHash]         NVARCHAR (MAX) NULL,
[PhoneNumber]          NVARCHAR (MAX) NULL,
[PhoneNumberConfirmed] BIT            NOT NULL,
[SecurityStamp]        NVARCHAR (MAX) NULL,
[TwoFactorEnabled]     BIT            NOT NULL,
[UserName]             NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUsers] PRIMARY KEY CLUSTERED ([Id] ASC)
);

CREATE TABLE [dbo].[AspNetRoleClaims] (
[Id]         INT            IDENTITY (1, 1) NOT NULL,
[ClaimType]  NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
[RoleId]     NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetRoleClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_AspNetRoleClaims_AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserClaims] (
[Id]         INT            IDENTITY (1, 1) NOT NULL,
[ClaimType]  NVARCHAR (MAX) NULL,
[ClaimValue] NVARCHAR (MAX) NULL,
[UserId]     NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserClaims] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_AspNetUserClaims_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserLogins] (
[LoginProvider] NVARCHAR (128) NOT NULL,
[ProviderKey]   NVARCHAR (128) NOT NULL,
[ProviderDisplayName]   NVARCHAR (128) NULL,
[UserId]        NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserLogins] PRIMARY KEY CLUSTERED ([LoginProvider] ASC, [ProviderKey] ASC, [UserId] ASC),
CONSTRAINT [FK_AspNetUserLogins_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
);

CREATE TABLE [dbo].[AspNetUserRoles] (
[UserId]    NVARCHAR (256) NOT NULL,
[RoleId]    NVARCHAR (256) NOT NULL,
CONSTRAINT [PK_AspNetUserRoles] PRIMARY KEY CLUSTERED ([UserId] ASC, [RoleId] ASC),
CONSTRAINT [FK_AspNetUserRoles_AspNetRoles_RoleId] FOREIGN KEY ([RoleId]) REFERENCES [dbo].[AspNetRoles] ([Id]) ON DELETE CASCADE,
CONSTRAINT [FK_AspNetUserRoles_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
 );

CREATE TABLE [dbo].[AspNetUserTokens] (
[UserId]    NVARCHAR (256) NOT NULL,
[LoginProvider] NVARCHAR (256) NOT NULL,
[Name]  NVARCHAR (256) NOT NULL,
[Value] NVARCHAR (MAX) NOT NULL,
CONSTRAINT [PK_AspNetUserTokens] PRIMARY KEY CLUSTERED ([UserId] ASC, [LoginProvider] ASC, [Name] ASC),
CONSTRAINT [FK_AspNetUserTokens_AspNetUsers_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[AspNetUsers] ([Id]) ON DELETE CASCADE
 );

GO
CREATE NONCLUSTERED INDEX [IX_AspNetRoleClaims_RoleId]
ON [dbo].[AspNetRoleClaims]([RoleId] ASC);

GO
CREATE UNIQUE NONCLUSTERED INDEX [RoleNameIndex]
ON [dbo].[AspNetRoles]([NormalizedName] ASC)
WHERE [NormalizedName] IS NOT NULL;

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserClaims_UserId]
ON [dbo].[AspNetUserClaims]([UserId] ASC);

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserLogins_UserId]
ON [dbo].[AspNetUserLogins]([UserId] ASC);

GO
CREATE NONCLUSTERED INDEX [IX_AspNetUserRoles_RoleId]
ON [dbo].[AspNetUserRoles]([RoleId] ASC);

GO
CREATE NONCLUSTERED INDEX [EmailIndex]
ON [dbo].[AspNetUsers]([NormalizedEmail] ASC);

GO
CREATE UNIQUE NONCLUSTERED INDEX [UserNameIndex]
ON [dbo].[AspNetUsers]([NormalizedUserName] ASC)
WHERE [NormalizedUserName] IS NOT NULL;