I have a file file.txt with the following:
6,73,6,71
32,1,0,12
3,11,1,134
43,15,43,6
55,0,4,12
And this code to read it and feed it to a jagged array:
string[][] arr =new string[5][];
string[] filelines= File.ReadAllLines("file.txt");
for (int i = 0; i< filelines.Length; i++)
{
arr[i] =filelines[i].Split(',').ToArray();
}
How would I do the same thing, but with a 2D array?
Pravesh Singh
17-Dec-2013Hi Royce,
Assuming you know the dimensions of your 2D array (or at least the maximum dimensions) before you start reading the file, you can do something like this:
string[,] arr = new string[5,4];
string[] filelines = File.ReadAllLines("file.txt");for (int i = 0; i < filelines.Length; i++)
{
var parts = filelines[i].Split(','); // Note: no need for .ToArray()
for (int j = 0; j < parts.Length; j++)
{
arr[i, j] = parts[j];
}
}
If you don't know the dimensions, or if the number of integers on each line may vary, your current code will work, and you can use a little Linq to convert the array after you've read it all in:
string[] filelines = File.ReadAllLines("file.txt");string[][] arr = new string[filelines.Length][];
for (int i = 0; i < filelines.Length; i++)
{
arr[i] = filelines[i].Split(','); // Note: no need for .ToArray()
}
// now convert
string[,] arr2 = new string[arr.Length, arr.Max(x => x.Length)];
for(var i = 0; i < arr.Length; i++)
{
for(var j = 0; j < arr[j].Length; j++)
{
arr2[i, j] = arr[i][j];
}
}
Thanks