DAL - BLL - GUI + 组合根。如何设置 DI 绑定

在使用DAL（数据访问层）到BLL（业务逻辑层）的过程中，我们通常会使用GUI（图形用户界面）与组合根进行交互。为了实现依赖注入（DI）的绑定，我们需要明确每个层级的职责和关系，并使用适当的框架来实现绑定。

csharp
// DAL层
public interface IDataAccessLayer
{
    void GetData();
}
public class DataAccessLayer : IDataAccessLayer
{
    public void GetData()
    {
        Console.WriteLine("Getting data from database...");
    }
}
// BLL层
public interface IBusinessLogicLayer
{
    void ProcessData();
}
public class BusinessLogicLayer : IBusinessLogicLayer
{
    private readonly IDataAccessLayer _dataAccessLayer;
    public BusinessLogicLayer(IDataAccessLayer dataAccessLayer)
    {
        _dataAccessLayer = dataAccessLayer;
    }
    public void ProcessData()
    {
        Console.WriteLine("Processing data...");
        _dataAccessLayer.GetData();
    }
}
// GUI层
public class GraphicalUserInterface
{
    private readonly IBusinessLogicLayer _businessLogicLayer;
    public GraphicalUserInterface(IBusinessLogicLayer businessLogicLayer)
    {
        _businessLogicLayer = businessLogicLayer;
    }
    public void Run()
    {
        Console.WriteLine("Running GUI...");
        _businessLogicLayer.ProcessData();
    }
}
// DI绑定
public static class DependencyInjectionConfig
{
    public static void Configure(IServiceCollection services)
    {
        services.AddTransient();
        services.AddTransient();
        services.AddTransient();
    }
}
// 程序入口
public class Program
{
    public static void Main(string[] args)
    {
        var services = new ServiceCollection();
        DependencyInjectionConfig.Configure(services);
        var serviceProvider = services.BuildServiceProvider();
        var gui = serviceProvider.GetService();
        gui.Run();
    }
}