Question

让我描述逻辑然后是类结构。有对象，所有对象必须从ConfigurationObjectBase继承。每个对象必须由Manager拥有，并且所有Manager必须从ConfigurationObjectManagerBase派生。当创建一个新的对象实例时，其中一个构造函数必须接受Manager的实例，而Manager的实例必须将该对象实例添加到名为ChildObjects的属性中。以下是课程样本。您是否可以帮助纠正以下代码中的业务规则？感谢。

public class ConfigurationObjectBase<ObjectType>
{
    public ConfigurationObjectBase(ConfigurationObjectManagerBase<ObjectType> ownerManager)
    {
        ownerManager.ChildObjects.Add(this);
    }
}


public class ConfigurationObjectManagerBase<ObjectType>
{
    public ConfigurationObjectManagerBase()
    {
        ChildObjects = new List<ObjectType>();
    }

    public List<ObjectType> ChildObjects { get; set; }
}

public class Catalog : ConfigurationObjectBase<Catalog>
{
    public Catalog(CatalogManager ownerManager) : base(???)
    {

    }
}

public class CatalogManager : ConfigurationObjectManagerBase<CatalogManager>
{
    public CatalogManager() : base()
    {
    }
}

Answer 1

您的代码中存在两个问题：

CatalogManager应该继承自ConfigurationObjectManagerBase<Catalog>，而不是ConfigurationObjectManagerBase<CatalogManager>
ChildObjects应该是ConfigurationObjectBase<ObjectType>的列表，而不是ObjectType的列表（否则您无法为其添加ConfigurationObjectBase<ObjectType>）

所以代码应该看起来像这样：

public class ConfigurationObjectBase<ObjectType>
{
    public ConfigurationObjectBase(ConfigurationObjectManagerBase<ObjectType> ownerManager)
    {
        ownerManager.ChildObjects.Add(this);
    }
}


public class ConfigurationObjectManagerBase<ObjectType>
{
    public ConfigurationObjectManagerBase()
    {
        ChildObjects = new List<ConfigurationObjectBase<ObjectType>>();
    }

    public List<ConfigurationObjectBase<ObjectType>> ChildObjects { get; set; }
}

public class Catalog : ConfigurationObjectBase<Catalog>
{
    public Catalog(CatalogManager ownerManager) : base(ownerManager)
    {

    }
}

public class CatalogManager : ConfigurationObjectManagerBase<Catalog>
{
    public CatalogManager()
    {
    }
}

此外，您不需要调用默认的基类构造函数（base()），它由编译器隐式完成。

c＃继承自泛型类

1 个答案: