String format using MultiBinding?
you are trying to bind a string to an object. But StringFormat requires its target to be a string type.
try putting a TextBlock in your label content and bind your data to it
<StackPanel> <Slider x:Name="sl1" Minimum="10" Maximum="100"/> <Slider x:Name="sl2" Minimum="10" Maximum="100"/> <Label x:Name="label13" Background="Yellow" Foreground="Black"> <Label.Content> <TextBlock> <TextBlock.Text> <MultiBinding StringFormat="{}{0} x {1} Test"> <Binding ElementName="sl1" Path="Value" /> <Binding ElementName="sl2" Path="Value" /> </MultiBinding> </TextBlock.Text> </TextBlock> </Label.Content> </Label></StackPanel>EDITyour class Movie must implement the INotificationPropertyChanged interface and your two properties must raise the property changed event with their proprty names!
hope this helps