c# store textbox(file content) lines into array

Question

Hey I am currently stuck. I have the following code that takes a line from a file, based on specific string and returns it, then it can be edited, and applied back to a textbox that contains the file content into the line that the string was initially taken from.

    private void citationChange()
    {
        List<string> matchedList = new List<string>();

        string[] linesArr = File.ReadAllLines(fileName);

        //find matches
        for (int a = 0; a < linesArr.Length; a++)
        {
            string s = linesArr[a];
            if (s.Contains(citation))
            {
                matchedList.Add(linesArr[a]); //matched
                lineBeingEdited = a;
                break; //breaks the loop when a match is found
            }
        }

        //output
        foreach (string s in matchedList)
        {
            string citationLine = s;
            string[] lineData = citationLine.Split(',');
            editModuleComboBox.Text = lineData[1];
            selectedModuleLabel.Text = lineData[2];
            moduleTitleTextBox.Text = lineData[3];
            creditsTextBox.Text = lineData[4];
            semesterTextBox.Text = lineData[5];
            examWeightingTextBox.Text = lineData[6];
            examMarkTextBox.Text = lineData[7];
            testWeightingTextBox.Text = lineData[8];
            testMarkTextBox.Text = lineData[9];
            courseworkWeightingTextBox.Text = lineData[10];
            courseworkMarkTexbox.Text = lineData[11];
        }
    }

How can I recreate/change this code but for it to read a textbox instead of a file?

Thanks

Answer 1

Change this:

string[] linesArr = File.ReadAllLines(fileName);

to:

string[] linesArr = theTextBox.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);