Use XAML StringFormat to get one decimal place

Question

I have this Circle Slider:

enter image description here

And this is my TextBlock inside:

 <TextBlock Text="{Binding Path=Value, ElementName=knobSlider}" Foreground="White" FontFamily="Trebuchet MS" FontSize="20" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.7,2.478" Margin="59,100,44,26" Width="47" />

How can i convert the Slider value from double to only one decimal place and put this text in the middle of the circle ?

You can use Binding String Format (StringFormat={}{0:#,#.0}). msdn.microsoft.com/en-us/library/… — Ayyappan Subramanian
– Ayyappan Subramanian, Commented Jun 11, 2015 at 15:16
What are you using for a Circle Slider, and can you post the XAML for it? — goobering
– goobering, Commented Jun 11, 2015 at 15:39
i am using it instead of the default one, you can find all the example here: alala666888.wordpress.com/2010/05/31/a-knob-slider-control — Verint Verint
– Verint Verint, Commented Jun 11, 2015 at 15:41

Maxime Tremblay-Savard · Accepted Answer · 2015-06-11 15:36:49Z

Simply use the string format <TextBox Text="{Binding Value, StringFormat={}{0:#,#.0}}" />.

So in your case it would look like:

<TextBlock Text="{Binding Path=Value, ElementName=knobSlider, StringFormat={}{0:#,#.0}}" Foreground="White" FontFamily="Trebuchet MS" FontSize="20" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.7,2.478" Margin="59,100,44,26" Width="47" />

And how can i put my Text Block in the middle of the circle ? (both my slider and my text block are inside grid)
Well it's a different question and we'd need more details on how your grid is structured, but normally you play with the column/row sizes or padding/margin.

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