Question

我有一个继承自另一个人的班级;父类具有所有统计数据（想象一个RPG字符表），而子类只有很少的额外参数。

当我启动子类时，如何调用父类的构造函数，以获取使用泛型数据初始化的所有参数？我是否必须明确地调用它或C＃自动执行它？

父类：

public class genericguy
{
    private string _name;
    private int _age;
    private string _phone;

    public genericguy(string name)
    {
        this._name = name;
        this._age = 18;
        this._phone = "123-456-7890";
    }
    // the rest of the class....
}

儿童班：

public class specificguy:genericguy
{
    private string _job;
    private string _address;

    public specificguy(string name)
    {
        this._name = name;
        this._job = "unemployed";
        this._address = "somewhere over the rainbow";
        // init also the parent parameters, like age and phone
    }
    // the rest of the class....
}

在这个例子中，我有genericguy类;在构造函数中创建对象时，有3个参数可以设置。我想在子类中称为“specificguy，这些参数已初始化，因为它发生在父级中。我该怎么做呢？在Python中，你总是调用父("__init__")的构造函数，但我不确定C＃

Answer 1

儿童班：

public class specificguy:genericguy
{
    private string _job;
    private string _address;
    //call the base class constructor by using : base()
    public specificguy(string name):base(name) //initializes name,age,phone
    {
        //need not initialize name as it will be initialized in parent
        //this._name = name;
        this._job = "unemployed";
        this._address = "somewhere over the rainbow";
    }
}

Answer 2

答案分为两部分：

使用: base(...)语法
您不会复制派生类中基类所做的分配。

如果您的specificguy意味着构造函数应如下所示：

public specificguy(string name) : base(name)
{
    // The line where you did "this._name = name;" need to be removed,
    // because "base(name)" does it for you now.
    this._job = "unemployed";
    this._address = "somewhere over the rainbow";
    // init also the parent parameters, like age and phone
}

在Python中，您总是调用父("__init__")
的构造函数

C＃将自动为您调用无参数构造函数;在缺少此类构造函数的情况下，您必须通过: base(...)语法提供显式调用。

Answer 3

您可以将子类构造函数声明为

GETUTCDATE()

从子进程调用父类的构造函数的正确方法

3 个答案: