How to determine whether TextChanged was triggered by keyboard in C#?

Question

I have a method

private void textBoxPilot_TextChanged(object sender, TextChangedEventArgs e)
{ ... }

where the textbox in question takes a search string from the user and populates a ListBox with the results on every keystroke.

Subsequently, when an item is picked from the ListBox, I would like the choice reflected in the same Textbox. However, I don't want to trigger the search mechanism, which would cause the Listbox to forget its selection.

How can I determine whether the TextChanged event was triggered by the user (via they keyboard or maybe copy/paste) or by another method using textBoxPilot.Text = "Pilot name";?

Thanks.

Answer 1

bit of a hack, but....

public class MyForm : Form
{
    private bool _ignoreTextChanged;

    private void listView1_SelectionChanged( object sender, EventArgs e )
    {
       _ingnoreTextChanged = true;
       textBoxPilot.Text = listView1.SelectedValue.ToString(); // or whatever
    }

    private void textBoxPilot_TextChanged( object sender, TextChangedEventArgs e )
    {
       if( _ignoreTextChanged )
       {
           _ignoreTextChanged = false;
           return;
       }

       // Do what you would normally do.
    }
}