C＃将活动添加到另一个列表 [英] C# add actives to another list

问题描述

您好我有一个名为Animal.cs的课程，在我的Program.cs中我创造了一些动物..

Hello i have one class called Animal.cs and in my Program.cs i have created some animals..

class Program
    {
        static void Main(string[] args)
        {
            var AnimalList = new AnimslList();
        animalList.Add(new Animal{ Active = true, Name = "Bob", Photo = "Espanha" });
        animalList.Add(new Animal { Active = false, Name = "Robby", Photo = "Portugal" });
        animalList.Add(new Animal { Active = true, Name = "Snoop", Photo = "UK" });
        }
     }

我有一个类AnimalList.cs并且在那个类中我添加了动物列表，我正在用这个获取活跃的动物代码：

and i have one class AnimalList.cs and in that class i added Animal list, and im getting the active animals with this code:

class AnimalList : List<Animal>
{
    public List<Animal> GetActiveAnimals()
    {
        return this.FindAll(p => p.Active);
    }
}

我的问题是在这个类中他在event.cs中调用了Event.cs我希望得到GetActiveAnimals（）的结果因为我只想得到活动的动物，有人可以帮我吗？

and my problem is in this class he called Event.cs in event.cs i want get the results from GetActiveAnimals() because i just want to get the active animals for the event can someone help me please?

class Event
    {
        private AnimalList _contestants;
    }

我应该从上面这个中的AnimaList获得Active。活跃的应该进入_contestants



我尝试过：



我不知道如何真正需要帮助这是我的代码的最后一个问题我认为



i nee来获取列表中此类的活动_contestants



class活动

{

私人AnimalList _contestants;

}

i should get the Active from the AnimaList in this one above. The active ones should go into _contestants

What I have tried:

I didn't know how to i really need help with this it's my last problem of this code i think

i nee to get the actives in this class in the list _contestants

class Event
{
private AnimalList _contestants;
}

推荐答案

问题是你的Main方法中的AnimalList：

The problem is that your AnimalList in your Main method:

static void Main(string[] args)
    {
    var AnimalList = new AnimslList();
    animalList.Add(new Animal{ Active = true, Name = "Bob", Photo = "Espanha" });
    animalList.Add(new Animal { Active = false, Name = "Robby", Photo = "Portugal" });
    animalList.Add(new Animal { Active = true, Name = "Snoop", Photo = "UK" });
    }

函数的本地函数 - 你不能在函数外部访问它，除非你把它传递给另一个方法。

所以如果你这样做的话：

Is local to the function - you can't access it outside the function unless you pass it to another method.
So if you were to do this:

static void Main(string[] args)
    {
    var AnimalList = new AnimslList();
    animalList.Add(new Animal{ Active = true, Name = "Bob", Photo = "Espanha" });
    animalList.Add(new Animal { Active = false, Name = "Robby", Photo = "Portugal" });
    animalList.Add(new Animal { Active = true, Name = "Snoop", Photo = "UK" });
    Event ev = new Event();
    ev.ListOfAnimalsPropertyYouNeedToAdd = AnimalList;
    ...
    }

然后，您可以使用您传入的列表来识别活动列表：

You can then use the list you passed in to identify the active ones:

foreach (Animal a in ev.GetActiveAnimals())
    {
    ...
    }

通过在Event类中编写代码：

By writing the code in your Event class:

public List<Animal> GetActiveAnimals()
    {
    return ListOfAnimalsYouSavedWhenYouSetThePropertyEarlier.GetActiveAnimals();
    }

（但不要称之为活动 - 在C＃中具有特定含义，您的老师将在稍后解释）

(But don't call it Event - that has a specific meaning in C# that your teacher will explain later)

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