向Autofac注册使用IDesignTimeDbContextFactory

Question

我想向Autofac注册OrderContext，但是OrderContext使用IDesignTimeDbContextFactory，而Autofac执行失败。错误是下一个：

  

无法解析参数   “ Microsoft.EntityFrameworkCore.DbContextOptions 1[...OrderContext] options' of constructor 'Void .ctor(Microsoft.EntityFrameworkCore.DbContextOptions 1 [... OrderContext]）”。   在   Autofac.Core.Activators.Reflection.ReflectionActivator.GetValidConstructorBindings（IComponentContext   上下文，IEnumerable 1 parameters) at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IComponentContext context, IEnumerable 1个参数）位于   Autofac.Core.Resolving.InstanceLookup.Activate（IEnumerable`1   参数）

Autofac配置：

protected override void Load(ContainerBuilder builder)
{
    builder.RegisterType<OrderContext>()
        .InstancePerDependency();
}

OrderContext是下一个：

public class OrderContext : DbContext
{
    public DbSet<Order> Orders { get; }

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

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfiguration(new OrderEntityTypeConfiguration());
    }
}

public class OrderContextDesignFactory : IDesignTimeDbContextFactory<OrderContext>
{
    public OrderContext CreateDbContext(string[] args)
    {
        var optionsBuilder = new DbContextOptionsBuilder<OrderContext>()
            .UseSqlServer(
                "...");

        return new OrderContext(optionsBuilder.Options);
    }
}