Get specific Strings from File

Question

Good morning to every one.
I 've got a text file which contains a customer number and an order number, coded as we see in the picture below:
I am trying to develop a tool in Visual Studio, which it reads the file line-by-line and fills a listbox, with the order_number and the customer number. From the file above, I know that the order number are the digits on the first 'column' after the leading-zeros,
until '/', and the customer number are the digits without zeros in the 'third' column before 'CUSTOMER_NUMBER'. My form looks like:
The problem is, that the number of before the fields in file, are not equal in every line.
So, my question is how I can retrieve the 'order number' and 'customer number' from the text file and copy the results to list box, after clicking on 'Get Strings' button, like:
359962656   2238914
359562804   2238914
etc...
I attach my code here:
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 ReadStringFileApp
public partial class frmMain : Form
public frmMain()
InitializeComponent();
OpenFileDialog openfile = new OpenFileDialog();
//openfiledialog to pickup filename
private void btnFindFile_Click(object sender, EventArgs e)
openfile.Filter = "Text|*.txt";
if (openfile.ShowDialog() == DialogResult.OK)
lbxResults.Items.Clear();
txtFilepath.Text = openfile.FileName.ToString();
//get strings from file
private void btnGetStrings_Click(object sender, EventArgs e)
//check if there is a file path on textbox
if (txtFilepath.Text == "")
MessageBox.Show("No File Select. Please select a file", "Error File Name", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnFindFile.Focus();
return;
//create list for all lines inside file
List<string> lines = new List<string>();
string line;
using (StreamReader r = new StreamReader(@txtFilepath.Text))
while ((line = r.ReadLine()) != null)
string ordernum;//string for order number
string customer;//string for customer number
//line = ordernum + "\t" + customer; //concatenate results to fill the list box
lbxResults.Items.Add(line);
r.Close(); //close file
private void btnExportToFIle_Click(object sender, EventArgs e)
//check if listbox is empty
if (lbxResults.Items.Count == 0)
MessageBox.Show("Result List is empty! Choose a file to proceed.", "Error Result List", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnGetStrings.Focus();
return;
//read listbox contents and parse to a list object
List<string> list = new List<string>();
foreach (String i in lbxResults.Items)
list.Add(i);
//Create a file in c: with results
File.WriteAllLines(@"C:\export-test.txt", list, Encoding.Default);
MessageBox.Show("File export completed!", "File Export", MessageBoxButtons.OK, MessageBoxIcon.Information);
Thank you in advanced

Answer 1

@ Joel Engineer
and@
Val10
I combined your responses and I get my results correctly. I attached the code I rewrite for further use:
private void btnGetStrings_Click(object sender, EventArgs e)
//check if there is a file path on textbox
if (txtFilepath.Text == "")
MessageBox.Show("No File Select. Please select a file", "Error File Name", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnFindFile.Focus();
return;
//create list for all lines inside file
List<string> lines = new List<string>();
string line;
using (StreamReader r = new StreamReader(@txtFilepath.Text))
while ((line = r.ReadLine()) != null)
string order_customer;
Regex reg = new Regex("0*");
//set an string array, to split the file in columns positions, defining the characters
string[] daneio = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
//get order number from the first column
var ordernum_zeros = reg.Match(daneio[0]).Value;
daneio[0] = daneio[0].Replace(ordernum_zeros, String.Empty);
daneio[0] = daneio[0].Substring(0, daneio[0].IndexOf("/"));
//get customer column, without zeros
var customer_zeros = reg.Match(daneio[5]).Value;
daneio[2] = daneio[2].Replace(customer_zeros, String.Empty);
daneio[2] = daneio[2].Substring(0, daneio[5].IndexOf("CUSTOMER_NUMBER"));
//combine the result in listbox
order_customer = daneio[0] + "\t" + daneio[2];
lbxResults.Items.Add(order_customer);
r.Close(); //close file
Thank you for your help!