2d Array from text file c# [closed]

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
– il_guru, Commented Dec 5, 2012 at 14:10
you need to show what youve done so far - if nothing, then what you intend to do! — Chris
– Chris, Commented Dec 5, 2012 at 14:10
I do aplogise I am new to the site but will bare it in mind for future references — ProgrammingRookie
– ProgrammingRookie, Commented Dec 5, 2012 at 15:16

Esailija · Accepted Answer · 2012-12-05 14:18:20Z

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 5, 2012 at 14:18

answered Dec 5, 2012 at 14:11

Esailija

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Community · Accepted Answer · 2017-05-23 12:33:02Z

8

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, 2017 at 12:33

CommunityBot

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answered Dec 5, 2012 at 13:58

L.B

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4 Comments

ProgrammingRookie Over a year ago

Thanks for the quick reply, it has to be a 2d array, cant get my head around it

ProgrammingRookie Over a year ago

whats the using directive for it?>

ProgrammingRookie Over a year ago

sorted it now, Thanks for all you help

Okloks Over a year ago

What's going on inthis code?

Tim Schmelter · Accepted Answer · 2012-12-05 13:57:34Z

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 5, 2012 at 13:57

Tim Schmelter

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