C# compilation error converting char[] into string[]

Question

I am trying to compile a c3 program but I keep on getting the error below.

Error CS1502: The best overloaded method match for string.Join(string, string[]) has some invalid arguments.

Error CS1503: Argument #2 cannot convert char[] expression to type string[]

for (int row = 0; row < 3; row++)
{
    char[] arr = new char[3];
    for (int col = 0; col < 3; col++)
    {
        if (board[row, col] == Player.None)
        {
            arr[col] = ' ';
        }
        else
        {
            arr[col] = board[row, col] == Player.P1 ? 'X' : 'O';
        }
    }
     
    Console.WriteLine("| {0} |", string.Join(" | ", arr));

Well everything is in the message : you're creating a char array while your method is expecting a string array... — Laurent S.
– Laurent S., Commented Nov 14, 2013 at 10:01
Duplicate of How to convert a char array to a string array?. — CodeCaster
– CodeCaster, Commented Nov 14, 2013 at 10:03

David Pilkington · Accepted Answer · 2013-11-14 10:02:06Z

3

The answer is very simple, arr is a char[] and not a string[].

try this

Console.WriteLine("| {0} |", string.Join(" | ", arr.Select(a => a.ToString())));

answered Nov 14, 2013 at 10:02

David Pilkington

13.6k3 gold badges43 silver badges75 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 12:28:45Z

2

You could either iterate the chars (as suggested by others) of the array or you could change the type of the array

for (int row = 0; row < 3; row++)
{
    var arr = new string[3];
    for (int col = 0; col < 3; col++)
    {
        if (board[row, col] == Player.None)
        {
            arr[col] = " ";
        }
        else
        {
            arr[col] = board[row, col] == Player.P1 ? "X" : "O";
        }
    }

    Console.WriteLine("| {0} |", string.Join(" | ", arr));
}

edited May 23, 2017 at 12:28

CommunityBot

11 silver badge

answered Nov 14, 2013 at 10:06

Rune FS

21.7k7 gold badges65 silver badges101 bronze badges

1 Comment

Chris Over a year ago

This is actually probably the best solution - using the right array type in the first place. Well done on looking at the problem fully rather than just fixing the erroring line (which is what I did in my head before others answered what I intended to).

Tigran · Accepted Answer · 2013-11-14 10:01:20Z

0

As your arr is of type char[], you can use String(char[]) constructor to create string object instance

var strData= new string[]{new string(arr)};
Console.WriteLine("| {0} |", (string.Join(" | ", strData));

answered Nov 14, 2013 at 10:01

Tigran

62.3k8 gold badges90 silver badges124 bronze badges

2 Comments

CodeCaster Over a year ago

This will return | Foo | when the input is {'F', 'o', 'o'}, I suspect OP wants | F | o | o | in that case.

Chris Over a year ago

@RuneFS: Despite me upvoting your comment I just checked and it will accept a string fine. ALthough I've not looked at the docs this second I think it has a params string[] overload (or similar) that means a single string is fine (if a little pointless).

Collectives™ on Stack Overflow

C# compilation error converting char[] into string[]

3 Answers 3

Comments

1 Comment

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related