C# – Set TextBlock to be entirely bold when DataBound in WPF

cnettextblockwpfxaml

I have a databound TextBlock control (which is being used inside a DataTemplate to display items in a ListBox) and I want to make all the text in the control bold. I can't seem to find a property in the properties explorer to set the whole text to bold, and all I can find online is the use of the <Bold> tag inside the TextBlock, but I can't put that in as the data is coming directly from the data source.

There must be a way to do this – but how? I'm very inexperienced in WPF so I don't really know where to look.

Best Answer

Am I missing something, or do you just need to set the FontWeight property to "Bold"?

<TextBlock FontWeight="Bold" Text="{Binding Foo}" />

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Use a TextBox with these settings instead to make it read only and to look like a TextBlock control.

<TextBox Background="Transparent"
         BorderThickness="0"
         Text="{Binding Text, Mode=OneWay}"
         IsReadOnly="True"
         TextWrapping="Wrap" />

C# – Automatic vertical scroll bar in WPF TextBlock

Wrap it in a scroll viewer:

<ScrollViewer>
    <TextBlock />
</ScrollViewer>

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:

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

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

Best Answer

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