Adding text in a new line in WPF RichTextBox at runtime

Question

I want to add some text in a WPF RichTextBox at runtime in a new line. I can do this using:

FlowDocument mcFlowDoc = new FlowDocument();
mcFlowDoc = richTextBox.Document;
Paragraph pr = new Paragraph();
pr.Inlines.Add(status);
mcFlowDoc.Blocks.Add(pr);
StatusText.Document = mcFlowDoc;

But there is too much of a gap between two lines. How can I fix this?

BTW, there's no point of creating a new `FlowDocument` (`mcFlowDoc = new FlowDocument();`) when you're changing its reference the next line `mcFlowDoc = richTextBox.Document;` — Alireza Noori, Nov 17 '12 at 11:25

score 9 · Answer 1 · answered Apr 19 '12 at 02:20

9

To avoid having to manually set the margin for every paragraph, you can add this to the RichTextBox's XAML:

<RichTextBox>
  <RichTextBox.Resources>
    <Style TargetType="{x:Type Paragraph}">
      <Setter Property="Margin" Value="0"/>
    </Style>
  </RichTextBox.Resources>
</RichTextBox>

answered Apr 19 '12 at 02:20

Merad

749
1
6
14

can you give an example of how you setup xaml for a Rich Text Box block or document ? (I'm just getting started with Rich Text Box programming from c#) – dr d b karron Mar 29 '14 at 16:51

score 7 · Answer 2 · answered Jun 20 '10 at 10:26

7

Try pr.Margin = new Thickness(0.0) to remove the gaps between paragraphs.

answered Jun 20 '10 at 10:26

Julien Lebosquain

40,639
8
105
117

score 3 · Accepted Answer · answered Jun 20 '10 at 11:22

3

According to the documentation, Paragraph spacing is defined by margins, which do not accumulate (no doubling up), so Julien Lebosquain's answer is correct.

MSDN on FlowDocument Paragraph Spacing

answered Jun 20 '10 at 11:22

Ian Gilham

1,916
3
20
31

Adding text in a new line in WPF RichTextBox at runtime

3 Answers3

Linked