c# - ASP.NET Core 中第三方数据上下文的依赖注入(inject)

Question

在我的 ASP.NET 核心 Web API 中，我需要使用 MongoDb。到目前为止，以下是我的实现，但我一直在解决依赖问题。

数据上下文:

 public class AppDbContext
    {
        public IMongoDatabase MongoDatabase { get; set; }
        public AppDbContext()
        {
            var client = new MongoClient("mongodb://localhost:27017");
            MongoDatabase = client.GetDatabase("cse-dev-db");
        }
    }

存储库:

public class BuyRepository: IBuyRepository {
    private readonly AppDbContext _appDbContext;
    public BuyRepository(AppDbContext appDbContext) {
        _appDbContext = appDbContext;
    }
    public Buy Add(Buy buy) {
        _appDbContext.MongoDatabase.GetCollection<Buy("Buy").InsertOne(buy);
        return buy;
    }
}

Controller :

private readonly BuyRepository _buyRepository;
public ValuesController(BuyRepository buyRepository) {
    _buyRepository = buyRepository;
}

我的问题是如何在 ConfigureServices 中添加这个依赖项

public void ConfigureServices(IServiceCollection services) {
    services.AddApplicationInsightsTelemetry(Configuration);
    services.AddMvc();
    // How to add dependencies here
}

PS:我已经看到了this但它不起作用。

更新

我已经按照用户的评论尝试了

public void ConfigureServices(IServiceCollection services)
        {
            // Add framework services.
            services.AddApplicationInsightsTelemetry(Configuration);
            services.AddScoped<AppDbContext>();
            services.AddMvc();
            services.AddScoped<IBuyRepository, BuyRepository>();
        }

现在我得到以下异常

Unable to resolve service for type'CseApi.Repositories.BuyRepository' while attempting to activate'CseApi.Controllers.ValuesController'.

Answer 1

尝试注册如下服务:

public void ConfigureServices(IServiceCollection services) {
    services.AddApplicationInsightsTelemetry(Configuration);
    services.AddScoped<AppDbContext>();
    services.AddScoped<IBuyRepository, BuyRepository>();
    services.AddMvc();
    // How to add dependencies here
}

评论更新

Controller 代码应如下所示:

private readonly IBuyRepository _buyRepository;
public ValuesController(IBuyRepository buyRepository) {
    _buyRepository = buyRepository;
}