Winforms autoheight text area.

Question

I have a richtextarea with a bunch of text in it. I would like to somehow make it expand to fit all the text without showing scroll bars. I would like the width to stay standard and the height to expand. Is there a good way of doing this? I planned on looping through and adding a pixel to its height every time.. and then checking if the scroll bars are visible. There is no simple way of doing this in vb.net that I can find without using windows api specific methods.

Answer 1

The way I would do this is by considering the SelectionStart property. If SelectionStart is x or a multiple of x then I would increase my height.

textBox.Multiline = true;
private void textBox_TextChanged(object sender, EventArgs e)
        {
            if (textBox.SelectionStart % 20 == 0)
            {
                textBox.Height += 20;
            }
        }