How to auto scroll to end

[Myoungsu]

I am developing log viewer using richtexteditor.

I do input the function whenever adding text on richtexteditor, it shows lastest part on there and cursor is located bottom on the control.

How to do it on richtexteditor.

 

And if you have more convienient choice to develop log viewer. let me know.

 

[Dimitar]

Hello ,

Thank you for writing.

You can use the following code to scroll to the bottom:

private void radButton1_Click(object sender, EventArgs e)
{
    radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.Value = radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.Maximum;
}

Please let me know if there is something else I can help you with. 

 

Regards,
Dimitar
Telerik

[Myoungsu]

It works well. Thanks a lot.

[Jay]

This doesn't smoothly scroll the control to the bottom. It looks very unprofessional.

 

[Dinko | Tech Support Engineer]

What else I can suggest is to manually change the value of the ScrollBar on every tick of DispatcherTimer. This way you could achieve a similar smooth scroll effect. For example, you could start the timer with a button click. Then you can use the radRichTextEditor1.RichTextBoxElement.ActiveEditorPresenter.ScrollToVerticalOffset() method to offset the thumb.

public int offset = 0;
private void Dt_Tick(object sender, EventArgs e)
{
    offset += 50;
    radRichTextEditor1.RichTextBoxElement.ActiveEditorPresenter.ScrollToVerticalOffset(offset);
    radRichTextEditor1.RichTextBoxElement.UpdateEditorLayout();
    if(radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.Value >= radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.Maximum - radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.LargeChange)
    {
        dt.Stop();
    }
}
DispatcherTimer dt = new DispatcherTimer();
private void radButton1_Click(object sender, EventArgs e)
{
    offset = radRichTextEditor1.RichTextBoxElement.VerticalScrollBar.Value;
            
    dt.Interval = new TimeSpan(0, 0, 0, 0, 100);
    dt.Tick += Dt_Tick;
    dt.Start();
}

I hope this approach will work for you.