类上的C#数组-访问一个元素的所有实例 [英] C# Array on Class - access all instances of one element

问题描述

C#的新手，想知道是否有一种方法可以传入所有出现的数组声明的类元素吗?

换句话说-

New to C# and want to know if there is a way to pass in all occurrences of of an array declared class element?

In other words -

class something()
{
string a;
string b;
}


class abc()
{
protected void main()
{
something s[] = new something[5]
... initialize array

CallRoutine(something.a[]) or
CallRoutine(something[].a)
}

protected void CallRoutine(string[] receiver)
{
loop through string array...
}
}

推荐答案

应该是这样的:

It should be like this:

public class Something()
{
    public string a;
    piblic string b;
}


public class Abc()
{
    public  void main()
    {
        Something[] s = new Something[5];
        //... initialize array

        CallRoutine(s);
    }

    protected void CallRoutine(Something[] receiver)
    {
        foreach(Something s in receiver)
        {
            // do something with s an instance of Something here
        }
    }
}

可以理解吗?如果不发表评论.

干杯！

Understandable? If not leave a comment.

Cheers!

那么，您是否要传递数组的''a''成员?如果是这样，您将无法获得任何内置功能.您必须创建一个包含所有a的数组才能通过.但这破坏了整个目的.您如何知道哪个a属于哪个object?虽然可以使用索引，但为什么要继续努力呢?

传递您的数组，并以您的方法可以执行任何您想做的事情.

So are you trying to pass the ''a'' members of the array? If so, there is nothing you can get build-in. You have to create an array of all a''s to pass. But that defeats the whole purpose. How would you know which a belong to which object? While you can use the index why go all the hard way.

Pass your array and in your method you can do what ever you want to do.

something s[] = new something[5]
... initialize array

CallRoutine(something)

在这里，我对您的要求的解释与曼弗雷德所做的不同.我将假设您要传递一个string 数组，该数组包含通过提取something.a或something.b获得的所有字符串.如果是这样，您可以使用LINQ进行此操作.这是一个示例:

Here''s an answer where I''ve interpreted your requirement differently to what Manfred did. I am going to assume you want to pass a string array consisting of all the strings obtained by extracting either something.a or something.b. If so, you can do this using LINQ. Here''s an example:

class something
{
    public string a;
    public string b;
}

class abc
{
    public static void CallRoutine(string[] receiver)
    {
    }
}

class Program
{
    static void Main(string[] args)
    {
        something[] s = new something[5];
        // init data

        abc.CallRoutine(s.Select(it => it.a).ToArray());
    }
}

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