UniqueSQF Sourcecode

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

namespace UniqueSQFIDs
{
    public partial class UniqueSQFIDs : Form
    {
        public UniqueSQFIDs()
        {
            InitializeComponent();
        }
        int startID;
        OpenFileDialog fdlg = new OpenFileDialog();
        System.IO.StreamReader sR;
        System.IO.StreamWriter sW;
        Regex reg = new Regex(@"_vehicle_\d*");
        private void btnGo_Click(object sender, EventArgs e)
        {
            try
            {
                startID = Convert.ToInt32(txtStartID.Text);
                fdlg.Title = "C# Corner Open File Dialog";
                fdlg.InitialDirectory = @"c:\";
                fdlg.Filter = "All files (*.*)|*.*|All files (*.*)|*.*";
                if (fdlg.ShowDialog() == DialogResult.OK)
                {
                    sR = new System.IO.StreamReader(fdlg.FileName);
                    using (sR)
                    {
                        using (sW = File.AppendText(fdlg.FileName.Replace(fdlg.SafeFileName, "SQFUniqueID" + Path.GetExtension(fdlg.FileName).ToString())))
                        {
                            string line;
                            int line2 = 0;
                            while ((line = sR.ReadLine()) != null)
                            {
                                Match regM = reg.Match(line);
                                if (regM.Success)
                                {
                               
                                    line2++;
                                    line = reg.Replace(line, "_vehicle_" + startID.ToString());
                                    sW.WriteLine(line);
                                    if (IsOdd(startID))
                                    {
                                        if (!IsOdd(line2))
                                        {
                                            startID++;
                                        }
                                    }
                                    else
                                    {
                                        if (!IsOdd(line2))
                                        {
                                            startID++;
                                        }
                                    }
                                }
                                else
                                {
                                    sW.WriteLine(line);
                                }
                            }
                        }
                    }
                }
            }
            catch
            {
                MessageBox.Show("Couldn't convert ID to INT");
            }
        }
        public static bool IsOdd(int value)
        {
            return value % 2 != 0;
        }
    }
}