Convert 2D string array into 2D int array (Multidimensional Arrays)

Question

I want to replace string[,] 2D array

public static readonly string[,] first =
{
    {"2", " ", " ", " ", "1"},
    {"2", " ", "4", "3", " "},
    {" ", "2", " ", "1", " "},
    {" ", "1", " ", "3", " "},
    {"1", " ", " ", " ", " "}
};

into int[,] array

int X=-1;
public static readonly int[,] second =  
{
    {2, X, X, X, 1},
    {2, X, 4, 3, X},
    {X, 2, X, 1, X},
    {X, 1, X, 3, X},
    {1, X, X, X, X}
};

Is it possible to convert a string[,] array to an int[,] array? If yes, how can I convert the string[,] into int[,]? Thank you.

I have tried to solve this with a loop, but I couldn't do it because the X should be the empty String `""` — tamaramaria, Nov 20 '16 at 19:54
I don't understand what you're trying to do, then. If `X` isn't an `int`, then you can't put it in an `int` array. — user94559, Nov 20 '16 at 20:03

score 1 · Answer 1 · answered Nov 20 '16 at 20:08

string[,] first =
{
    {"2", " ", " ", " ", "1"},
    {"2", " ", "4", "3", " "},
    {" ", "2", " ", "1", " "},
    {" ", "1", " ", "3", " "},
    {"1", " ", " ", " ", " "}
};


int[,] second = new int[first.GetLength(0), first.GetLength(1)];
int x = -1;
for (int i = 0; i < first.GetLength(0); i++)
{
    for (int j = 0; j < first.GetLength(1); j++)
    {
        second[i, j] = string.IsNullOrWhiteSpace(first[i, j]) ? x : Convert.ToInt32(first[i, j]);
    }
}

Jim · Accepted Answer · 2016-11-20T20:38:58.737

Live example: Ideone

public static readonly string[,] first =
{
     {"2", " ", " ", " ", "1"},
     {"2", " ", "4", "3", " "},
     {" ", "2", " ", "1", " "},
     {" ", "1", " ", "3", " "},
     {"1", " ", " ", " ", " "}
};

Convert (note that when the string = " ", I'm putting a 0 instead):

int[,] second = new int[first.GetLength(0), first.GetLength(1)];

for (int j = 0; j < first.GetLength(0); j++)    
{
    for (int i = 0; i < first.GetLength(1); i++)
    {
        int number;
        bool ok = int.TryParse(first[j, i], out number);
        if (ok)
        {
            second[j, i] = number;
        }
        else
        {
            second[j, i] = 0;
        }
    }
}

score 1 · Answer 3 · answered Nov 20 '16 at 20:10

Assuming X = -1:

private static int[,] ConvertToIntArray(string[,] strArr)
{
    int rowCount = strArr.GetLength(dimension: 0);
    int colCount = strArr.GetLength(dimension: 1);

    int[,] result = new int[rowCount, colCount];
    for (int r = 0; r < rowCount; r++)
    {
        for (int c = 0; c < colCount; c++)
        {
            int value;
            result[r, c] = int.TryParse(strArr[r, c], out value) ? value : -1;
        }
    }
    return result;
}

score -1 · Answer 4 · answered Nov 20 '16 at 20:04

-1

Use the loop you are using and replace the empty strings by null values, and if you're going to use this array just check if the value is not null.

answered Nov 20 '16 at 20:04

Dennis Díaz

17
5

Convert 2D string array into 2D int array (Multidimensional Arrays)

4 Answers4

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