Can i change combobox items in c# runtime?

Question

I have a windows form app and a there is a combobox, which is filled from a txt file.

        List<string> lines = System.IO.File.ReadLines(path).ToList();

        foreach (string l in lines)
        {
            combobox.Items.Add(l);
        }

As a result of a button, i would like to change the path. Is it possible? I changed the path but nothing happened, i think because i need to call the constructor again, but the button is in a different window, the combobox is in another window.

Answer 1

You can create a method that takes a path to your txt file as a parameter. Then you can call that method on Form_Load and Button_Click with different paths.

    private void Form1_Load(object sender, EventArgs e)
    {
        populateCombo(path);
    }

    private void populateCombo(string path)
    {
        comboBox1.Items.Clear();
        List<string> lines = System.IO.File.ReadLines(path).ToList();

        foreach (string line in lines)
        {
            comboBox1.Items.Add(line);
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        populateCombo(differentPath);
    }