XAML: How do I append a percent symbol to a bound label value?

Question

I have a label bound to the value of a slider.

Content="{Binding Path=Value, ElementName=Slider}"

How do I append a percentage symbol? The value of the slider is already formatted correctly, so when the value is '50', all I need is '50%'.

Edit 0: I know how to do it in code behind but I was hoping to accomplish this in xaml without creating a converter. TIA

Answer 1

You can use StringFormat like so

Content="{Binding Path=Value, ElementName=Slider, StringFormat='{0}%'}"

Answer 2

This works fine for me (tested in Kaxaml):

<StackPanel>  
  <Slider Minimum="0" Maximum="100" x:Name="slider" />
  <TextBlock Text="{Binding Path=Value, ElementName=slider, StringFormat='\{0\}%'}" />
</StackPanel>

Without the backslashes I got an error saying that the % character was invalid in that position.

Answer 3

Here's the solution for WPF >=3.5 SP1:

<Label Content="{Binding Path=Value, ElementName=Slider}" 
       ContentStringFormat="{0}%" />