参考 Implement dynamic dependency injection in ASP.NET Core 2.2, example with multitenancy scenario

namespace WebApiDemo.Extensions
{
    public static class ServiceCollectionExtensions
    {
        public static void AddScopedDynamic<TInterface>(this IServiceCollection services, IEnumerable<Type> types)
        {
            services.AddScoped<Func<string, TInterface>>(serviceProvider => tenant =>
            {
                var type = types.FilterByInterface<TInterface>()
                                .Where(x => x.Name.Contains(tenant))
                                .FirstOrDefault();

                if (null == type)
                    throw new KeyNotFoundException("No instance found for the given tenant.");

                return (TInterface)serviceProvider.GetService(type);
            });
        }
    }
}

这种注入代码看起来不太优雅啊 推荐通过反射批量注入,代码更加简洁

.NET Core 跨平台实战

使用注解注入：https://gitee.com/loogn/Autowired.Core

1.你的DBContext在哪注入的？
2.依照你的代码，批量注入时 BaseRespository<> 也没有注入进来啊