File

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace ConsoleApp5
{   /// <summary>
    /// Loads data from file and puts it into 2d int array[,] where first line is size of array
    /// </summary>
    public class LoadFile
    {
        public static int[,] pathsLenght { get; set; }
        public static int size { get; set; }

        // example of loaded txt file
        //  3
        //  0
        //  3 0
        //  6 5 0
        //
        //  3 -> size of towns (A, B, C)
        //     A B C  (Cities)
        //  A  0      (path from A to A equals 0)
        //  B  3 0    (path from A to B equals 3), (B to B = 0)
        //  C  6 5 0  (A to C = 6) , (B to C = 5), (C to C = 0) etc.

        public LoadFile(string fileName)
        {
            string[] lines = File.ReadAllLines(fileName);

            Int32.TryParse((lines[0].Trim()), out int x);
            size = x;
            pathsLenght = new int[x, x];

            for (int i = 1; i <= lines.Length - 1; i++)
            {
                string[] currentLenghts = lines[i].Trim().Split(' ');
                for (int j = 0; j < currentLenghts.Length; j++)
                {
                    pathsLenght[i - 1, j] = int.Parse(currentLenghts[j]);

                }
            }

            for (int i = 0; i < x; i++)
            {
                for (int j = 0; j < x; j++)
                {
                    if (i <= j)
                    {
                        continue;
                    }
                    else
                    {
                        int tmp = pathsLenght[i, j];
                        pathsLenght[j, i] = tmp;
                    }
                }
            }
        }

        public void ReadFile()
        {
            Console.WriteLine("Wczytane danych z pliku: ");
            for (int i = 0; i < pathsLenght.GetLength(0); i++)
            {
                Console.WriteLine("-" + i + "-x-");
                for (int j = 0; j < pathsLenght.GetLength(1); j++)
                {

                    Console.Write(pathsLenght[i, j] + " ");
                }
                Console.WriteLine("-" + i + "-x-");

            }
        }

    }
}