2d Array from text file c#

Question

I have a text file that looks like this

1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

in a 10 x 10 grid. using c# I need to take the text file and turn it into a 2d array of integers so that I can manipulate the integers on an independent level. Please help cant work it out,

To be helped you should post what you have tried and what problem you have. Just asking people for code without effort is not welcomed on this site — il_guru, Dec 05 '12 at 14:10
you need to show what youve done so far - if nothing, then what you intend to do! — Chris, Dec 05 '12 at 14:10
I do aplogise I am new to the site but will bare it in mind for future references — ProgrammingRookie, Dec 05 '12 at 15:16

Esailija · Accepted Answer · 2012-12-05T14:18:20.043

9

String input = File.ReadAllText( @"c:\myfile.txt" );

int i = 0, j = 0;
int[,] result = new int[10, 10];
foreach (var row in input.Split('\n'))
{
    j = 0;
    foreach (var col in row.Trim().Split(' '))
    {
        result[i, j] = int.Parse(col.Trim());
        j++;
    }
    i++;
}

The indices will be 0-based so if you want to access 10th column in fourth row:

Console.WriteLine(result[3,9]); //40

edited Dec 05 '12 at 14:18

answered Dec 05 '12 at 14:11

Esailija

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looks good thank you very much really helped me – ProgrammingRookie Dec 05 '12 at 14:16

score 6 · Answer 2 · edited May 23 '17 at 12:33

6

A jagged array?

int[][] list = File.ReadAllLines("a.txt")
                   .Select(l => l.Split(' ').Select(i => int.Parse(i)).ToArray())
                   .ToArray();

EDIT

You can use JaggedToMultidimensional here

int[,] list2 = JaggedToMultidimensional(list);

edited May 23 '17 at 12:33

Community

1
1

answered Dec 05 '12 at 13:58

L.B

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Thanks for the quick reply, it has to be a 2d array, cant get my head around it – ProgrammingRookie Dec 05 '12 at 14:01
@JoeySaxon OK, I updated the answer. – L.B Dec 05 '12 at 14:10
whats the using directive for it?> – ProgrammingRookie Dec 05 '12 at 14:13
sorted it now, Thanks for all you help – ProgrammingRookie Dec 05 '12 at 14:16
What's going on inthis code? – Okloks Apr 22 '16 at 16:57

score 2 · Answer 3 · answered Dec 05 '12 at 13:57

2

Perhaps:

var result = File.ReadLines(path)
    .SelectMany((l, i) => l.Split()
                           .Select(s => new int[] { i, int.Parse(s) })
                           .ToArray())
    .ToArray();

Edit: Although this is a jagged array int[][].

answered Dec 05 '12 at 13:57

Tim Schmelter

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2d Array from text file c#

3 Answers3

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