c# - ASP.NET 核心 : Error when using a custom DbContext while also using Identity

Question

我已经使用 Entity Framework 基于现有的 Azure SQL 数据库创建了一个 dbContext。我将此数据库添加到我的应用程序的服务中，如下所示:

        public void ConfigureServices(IServiceCollection services)
    {
        //Identity Database Context
        services.AddDbContext<IdentityDbContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("DataDb"),
            optionsBuilders =>
            optionsBuilders.MigrationsAssembly("WebPortal"))
        );

        services.AddIdentity<IdentityUser, IdentityRole>()
            .AddEntityFrameworkStores<IdentityDbContext>()
            .AddDefaultTokenProviders();

        //Custom Database Context
        services.AddDbContext<CustomDbContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("CustomDb"))
        );

        services.AddMvc();

    }

当我尝试运行它时，我收到以下错误消息:

InvalidOperationException: The DbContextOptions passed to the IdentityDbContext constructor must be a DbContextOptions. When registering multiple DbContext types make sure that the constructor for each context type has a DbContextOptions parameter rather than a non-generic DbContextOptions parameter.

我的自定义上下文的构造函数确实有一个参数:

    public CustomDbContext(DbContextOptions<CustomDbContext> options)
        : base(options)
    {
    }

为什么我收到错误？

Answer 1

我有同样的问题。
我的情况是，我需要两个上下文 读取数据上下文 和 写数据上下文 ，我用底部上下文解决了这个异常

public class ReadOnlyDataContext : DbContext
{
    public ReadOnlyDataContext(DbContextOptions options) : base(options)
    {
    }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.RemovePluralizingTableNameConvention();
        Assembly assemblyWithConfigurations = typeof(TaskConfiguration).Assembly;
        modelBuilder.ApplyConfigurationsFromAssembly(assemblyWithConfigurations);
    }
}

Pay attention to the DataContext Constructor

 public class WriteDataContext : DbContext, IContext
{
    public WriteDataContext(DbContextOptions<WriteDataContext> options)
        : base(options)
    {
    }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.RemovePluralizingTableNameConvention();
        Assembly assemblyWithConfigurations = typeof(TaskConfiguration).Assembly;
        modelBuilder.ApplyConfigurationsFromAssembly(assemblyWithConfigurations);
    }
}

And for registeration

 services.AddDbContext<DataContext>(opt =>
        {
            opt.UseSqlServer(configuration.GetConnectionString("CommanderConnection"));
            opt.LogTo(Console.WriteLine).EnableSensitiveDataLogging();
        });
 services.AddDbContext<ReadOnlyDataContext>(opt =>
        {
            opt.UseSqlServer(configuration.GetConnectionString("CommanderConnection"));
            opt.LogTo(Console.WriteLine).EnableSensitiveDataLogging();
        });