如何实例化泛型类 [英] How do I instantiate a generic class

问题描述

嗨 -



我正在学习更多关于泛型的知识，我想知道如何实例化泛型类。这是班级

Hi -

I'm learning more about generics and I'm wondering how to instantiate a generic typed class. Here is the class

public class MyGenericCommand<T> : ICommand<T,T> where T : IMyBaseStuff<IBaseStuff>
{
 ///reset of class code here
}

In另一堂课会想要一些像

In another class would want some thing like

private MyGenericCommand<some class> _command;

谢谢



我有什么试过：



c＃Generic on variable declaration，这可能吗？ - 堆栈溢出 [ ^ ]

推荐答案

请参阅泛型（C＃编程指南）| Microsoft Docs [ ^ ]。

没有多大意义，但

Doesn't make a lot of sense, but

public interface ICommand<T1, T2>
{
    T1 PropA { get; set; }
    T2 PropB { get; set; }
}

public interface IBaseStuff
{
    int PropD { get; set; }
}

public interface IMyBaseStuff<T>
{
    T PropC { get; set; }
}

public class MyGenericCommand<T> : ICommand<T, T> where T : IMyBaseStuff<IBaseStuff>
{
    public T PropA { get; set; }
    public T PropB { get; set; }
}

public class BaseStuff : IBaseStuff
{
    public int PropD {get;set;}
}

public class MyCommandClass : IMyBaseStuff<IBaseStuff>
{
    public IBaseStuff PropC {get; set;}
}

使用

Usage

MyGenericCommand<MyCommandClass> _command = new MyGenericCommand<MyCommandClass>();
_command.PropA = new MyCommandClass();
_command.PropB = new MyCommandClass();

_command.PropA.PropC = new BaseStuff();
_command.PropA.PropC.PropD = 123;

这篇关于如何实例化泛型类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！