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patterncsharpCritical

Automatic vertical scroll bar in WPF TextBlock?

Submitted by: @import:stackoverflow-api··
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wpfverticalbarscrollautomatictextblock

Problem

I have a TextBlock in WPF. I write many lines to it, far exceeding its vertical height. I expected a vertical scroll bar to appear automatically when that happens, but it didn't. I tried to look for a scroll bar property in the Properties pane, but could not find one.

How can I make vertical scroll bar created automatically for my TextBlock once its contents exceed its height?

Clarification: I would rather do it from the designer and not by directly writing to the XAML.

Solution

Wrap it in a scroll viewer:


    


NOTE this answer applies to a TextBlock (a read-only text element) as asked for in the original question.

If you want to show scroll bars in a TextBox (an editable text element) then use the ScrollViewer attached properties:



Valid values for these two properties are Disabled, Auto, Hidden and Visible.

Code Snippets

<ScrollViewer>
    <TextBlock />
</ScrollViewer>
<TextBox ScrollViewer.HorizontalScrollBarVisibility="Disabled"
         ScrollViewer.VerticalScrollBarVisibility="Auto" />

Context

Stack Overflow Q#1192335, score: 654

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