using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace txt_xml
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnOpen_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "Text Files|*.txt|All Files|*.*";
            openFileDialog1.ShowDialog();
            if (openFileDialog1.FileName != "")
            {
                this.Text = openFileDialog1.FileName;
                // Output file is the inputfile,  but extension xml instead of txt
                String outputFile = openFileDialog1.FileName.Replace(".txt", ".xml");
                // If the file alrady exists, ask if they want to replace it.
                if (File.Exists(outputFile))
                {
                    DialogResult result;
                    result = MessageBox.Show(outputFile+ " already exists. Do you want to replace it?", "Confirm Save As",MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation);
                    // If they say no, signal end by changing filename to null string.
                    if (result == DialogResult.Yes) outputFile = "";
                }
                // If thye haven't ended, write the output file.
                if (outputFile != "") {
                    Text = "Writing to " + outputFile;
                    // Get all lines from the input file.
                    string[] input = System.IO.File.ReadAllLines(openFileDialog1.FileName);
                        // Open the output file to write
                        using (System.IO.StreamWriter file =
                        new System.IO.StreamWriter(outputFile))
                        {
                            // Write header line:
                            file.WriteLine("<? xml version = \"1.0\" encoding = \"utf-8\" ?>");
                            file.WriteLine("<FILE>");
                            foreach (string line in input)
                            {
                                // Example: AL Alabama becomes <AL>Alabama</AL>
                                int space = line.IndexOf(" ");
                                String key = line.Substring(0, space);
                                String data = line.Substring(space + 1);
                                file.WriteLine("<" + key + ">" + data + "</" + key + ">");
                            }
                            // Add the end tag and close the file.
                            file.WriteLine("</FILE>");
                            file.Close();
                        }
                    }
                }
            }
        }
}