Autoscrolling in RichTextBox C# WinForms

Question

How can I do that if I append some text the RTB will automatically scroll down?

Now I'm using:

conversationRtb.Rtf = tab.conversationRtb.Rtf;
conversationRtb.SelectionStart = conversationRtb.Text.Length;
conversationRtb.ScrollToCaret();

But it isn't working well. Sometimes it doesn't scroll to end but one line before end.

rtb scroll down bug

Sometimes it makes a big offset.

rtb scroll down bug

I cannot find why. Is there any another way how to scroll down? I've found AutoScrollOffset but no examples how it works.

These two posts might help. They use `User32.dll` to scroll instead. http://stackoverflow.com/questions/8535102/inconsistent-results-with-richtextbox-scrolltocaret http://www.dutton.me.uk/2011/08/31/richtextbox-scrolltocaret-bug/ — keyboardP, Oct 05 '12 at 15:25
I'd rather don't use user32.dll. I'm using mono and I've problems with external libraries. — sczdavos, Oct 05 '12 at 15:37
Ok. I've just add condition. If Windows do @keyboardP solution else do default ScrollToCaret. Seems to works fine. — sczdavos, Oct 19 '12 at 15:04
The "dutton.me.uk" link in the comment from @keyboardP seems broken, but here's a working equivalent: http://www.dutton.me.uk/2011-08-31/richtextbox-scrolltocaret-bug/ ( notice that the slashes are now hyphens in the URL ). ;-) — bernz, Jul 20 '17 at 13:11

score 8 · Answer 1 · answered Oct 05 '12 at 15:28

8

You can adjust HideSelection value to false, the AppendText will trigger the correct scroll.

answered Oct 05 '12 at 15:28

Aghilas Yakoub

I've tried but not work for me :( – sczdavos Oct 05 '12 at 15:34
you are on winforms ??? or wpf (ScrollToEnd) – Aghilas Yakoub Oct 05 '12 at 15:37
Ohh sorry, yes I'm using winforms. I've updated tags. – sczdavos Oct 05 '12 at 15:39

1 Answers1