Question

Suppose I have a text file with data like below, I want to read first row and store the elements in one array. Read the second row and store in second array and so on. I will be making some manipulations on the array later on. Can you help me to do this in C#?

Input text file:

5,7,3,6,9,8,3,5,7

5,6,8,3,4,5

6,4,3,2,65,8,6,3,3,5,7,4

4,5,6,78,9,4,2,5,6

The Code I am trying out is:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace ReadFile
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        static void Main(string[] args)
        {
            TextReader tr = new StreamReader("Data.txt");
            // write a line of text to the file
            string word = tr.ReadLine();
            //now split this line into words
            string[] val = word.Split(new Char[] { ',' });
        }
    }

}

If I use the above technique, I can get the first line in array val. Is there a way to loop it for all the rows?

Answer 1

I figured it out. Thanks all for your time!

private void ReadFile()
    {
        var lines = File.ReadLines("Data.csv");
        var numbers = new List<List<double>>();
        var separators = new[] { ',', ' ' };
        /*System.Threading.Tasks.*/
        Parallel.ForEach(lines, line =>
        {
            var list = new List<double>();
            foreach (var s in line.Split(separators, StringSplitOptions.RemoveEmptyEntries))
            {
                double i;

                if (double.TryParse(s, out i))
                {
                    list.Add(i);
                }
            }

            lock (numbers)
            {
                numbers.Add(list);
            }
        });