How to get input from textbox in C#?

Question

First things first,I am very new to C# and programming all around. I have a standalone program that will read XML files in a certain location and convert them to plaintext files.

And I have a windows forms app that has a file directory and will display the chosen file in a textbox.

{
        Stream myStream;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            if ((myStream = openFileDialog1.OpenFile())!= null)
            {
                string strfilename = openFileDialog1.FileName;
                string filetext = File.ReadAllText(strfilename);
                textBox1.Text = filetext;
            }
        }
    }

Below is a snippet of my conversion program.

string[] files = Directory.GetFiles("C:\\articles");
        foreach (string file in files)
        {
            List<string> translatedLines = new List<string>();
            string[] lines = File.ReadAllLines(file);
            foreach(string line in lines)
            {
                if (line.Contains("\"check\""))
                {
                    string pattern = "<[^>]+>";
                    string replacement = " ";
                    Regex rgx = new Regex(pattern);
                    string result = rgx.Replace(line, replacement);
                    translatedLines.Add(result);
                }
            }

How would I modify my program to take the input from the textbox and then perform its conversion? (And Yes I'm aware I have to combine the two programs.)

Answer 1

Use XDocument class to parse the XML formatted string to XML Document so that you can get values on each Nodes of the XML

XDocument xDoc = new XDocument(); 
xDoc = XDocument.Parse(filetext);

Now read the content:

var textValue = xDoc.Descendants("Response").First().Attribute("Status").Value;