Duplicating UWP RichEditBox content adds extra lines

Question

I am trying to get and set rich text in a ;RichEditBox, but every time I do perform a GetText then a SetText, one extra carriage return is added. Here the super simple example with a button that does get then set. Try it out to see one extra carriage return being added every time you perform the Get-Set.

XAML

<StackPanel>
    <Button Content="Get-Set" Click="OnGetSet"/>
    <RichEditBox x:Name="RichEditor" Width="300" Height="200"/>
</StackPanel>

C#

private void OnGetSet(object sender, RoutedEventArgs e)
{
    RichEditor.Document.GetText(TextGetOptions.FormatRtf, out value);
    RichEditor.Document.SetText(TextSetOptions.FormatRtf, value);
} 

I tried all sort of options both in the SetText and in the GetText, but I am able to prevent additional carriage return to be inserted. Does anyone have a suggestion?

Answer 1

I ended up finding a reasonable workaround. I am getting the full range of text, then invoke the GetText on the range instead of the document.

I am not sure if this is the best solution, but it works fine.

Updated C#

private void OnGetSet(object sender, RoutedEventArgs e)
{
    var value = GetText(RichEditor);
    RichEditor.Document.SetText(TextSetOptions.FormatRtf, value);
}

public string GetText(RichEditBox editor)
{
    // get the actual size of the text
    editor.Document.GetText(TextGetOptions.UseLf, out string text);

    // get the text in the total range - to avoid getting extra lines
    var range = editor.Document.GetRange(0, text.Length);
    range.GetText(TextGetOptions.FormatRtf, out string value);

    // return the value
    return value;
}