Count symbols in RichTextBlock WinRT

Question

I have a RichTextBlock with some text.I dont want use vertical and horizontal scrolls. If I add a large text, some text is hiding. How can I get hidden text or how can I get current not hided text? Size of my RichTextBlock set dynamically.

Answer 1

Hi MaxChase,

Yes, you can, RichTextBlock has HasOverflowContent and you could bind the overflow content to the RichTextBlockOverflow by following statement:

RichTextBlock OverflowContentTarget="{Binding ElementName=nameOfTarget}" />

And then you could use ContentStart and ContentEndfor RichTextBlockOverflow to know the TextPointer .

--James

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Answer 2

Hi,James.
Can you tell how get this text? I understand about contentstart and contentend, but I dont understand how I should use it.

Answer 3

Hi MaxChase,

For instance we have a RichTextBlock (filled in with some context) and a RichTextBlockOverflow:

<RichTextBlock x:Name="rtb" OverflowContentTarget="{Binding ElementName=rtbof}" HorizontalAlignment="Left" Height="38" Margin="796,234,0,0" VerticalAlignment="Top" Width="56">
   <Paragraph>
       <Run Text="RichTextBlock111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"/>
   </Paragraph>
</RichTextBlock>
<RichTextBlockOverflow x:Name="rtbof" HorizontalAlignment="Left" Height="165" Margin="796,365,0,0" VerticalAlignment="Top" Width="369"/>
        

We can use the following C# code to get the TextPointer, and use Select function to get the text, here you go.

var start = rtbof.ContentStart;
var end = rtbof.ContentEnd;
rtb.Select(start, end);
var textYouNeed = rtb.SelectedText;

--James

---

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Answer 4

Thank you very much!