Wpf RichTextBox wrapping problems

问题

I am having a problems with text wrapping in WPF's RichTextBox, when I get the text like:

  TextRange tr = new TextRange(rtb.Document.ContentStart,
                               rtb.Document.ContentEnd);

tr.Text doesnt have any "\r\n", but in visual control it looks like it should be (it wraps when input reaches RichTextBox border (inserts end of the line)).

I create RichTextBox like this:

 <RichTextBox Name="Rtb"  AcceptsReturn="True" AcceptsTab="True"   VerticalAlignment="Stretch" HorizontalAlignment="Stretch"  
    HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Height="100" Margin="15,125,5,45"  Width="272">
            <FlowDocument  LineHeight="1" IsColumnWidthFlexible="true" >
                <Paragraph LineStackingStrategy="MaxHeight">
                    <Run Text="RichTextBox"/>
                </Paragraph>
            </FlowDocument>
 </RichTextBox>

回答1:

You have to place the RichTextBox in a ScrollViewer.

<ScrollViewer>
   <RichTextBox>
        ...
   </RichTextBox>
</ScrollViewer>

来源：https://stackoverflow.com/questions/14797814/wpf-richtextbox-wrapping-problems