Method should return multiple values

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执笔经年
执笔经年 2020-12-19 09:10

Hii

I have method in C#, I have to return multiple values from that method with out using collections like arrays. Is there any reliable way ?

7条回答
  •  轮回少年
    2020-12-19 09:38

    Yes, the out keyword:

    public void ReturnManyInts(out int int1, out int int2, out int int3)
    {
        int1 = 10;
        int2 = 20;
        int3 = 30;
    }
    

    then call it like this:

    int i1, i2, i3;
    ReturnManyInts(out i1, out i2, out i3);
    
    Console.WriteLine(i1);
    Console.WriteLine(i2);
    Console.WriteLine(i3);
    

    which outputs:

    10
    20
    30
    

    EDIT:

    I'm seeing that a lot of posts are suggesting to create your own class for this. This is not necessary as .net provides you with a class to do what they are saying already. The Tuple class.

    public Tuple ReturnMany()
    {
        return new Tuple(1, "some string", 'B');
    }
    

    then you can retrieve it like so:

    var myTuple = ReturnMany();
    myTuple.Item1 ...
    myTuple.Item2 ...
    

    there are generic overloads so you can have up to 8 unique types in your tuple.

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