Question

我有一些类，如AccountsController，ProductsController等，都是从BaseController继承的。 Unity根据需要设置我的服务。这些类也都需要_sequence服务。因为这是所有类的常见要求，我想在BaseController中对此进行编码。

public class AccountsController : BaseController
{
    public AccountsController(
        IService<Account> accountService) {
        _account = accountService;
    }

public class ProductsController : BaseController
{
    public ProductsController(
        IService<Account> productService) {
        _product = productService;
    }


public class BaseController : Controller
{
    public IService<Account> _account;
    public IService<Product> _product;
    protected ISequenceService _sequence;

    public BaseController(
        ISequenceService sequenceService) {
        _sequence = sequenceService;
    }

但我怎么能这样做？我应该在每个AccountsController和ProductsController的构造函数中设置对BaseController的调用吗？

Answer 1

您可以链接constructors：

public class ProductsController : BaseController
{
    public ProductsController(
        IService<Account> productService) : base(productService)
    {
        _product = productService;
    }
}

请注意，链式BaseController（使用base关键字）已经传递了productService参数，这很难处理。

更新

你可以执行以下操作（糟糕的依赖注入）：

public class ProductsController : BaseController
{
    public ProductsController(
        IService<Account> productService) : base(new SequenceService())
    {
        _product = productService;
    }
}

或者，通过继承类型传递对ISequenceService的依赖：

public class ProductsController : BaseController
{
    public ProductsController(
        IService<Account> productService, ISequenceService sequenceService) 
        : base(sequenceService)
    {
        _product = productService;
    }
}

在C＃中调用超级构造函数

1 个答案: