The RadGauge has a fixed size and it does not change its dimension when the page is being resized. As the RadGauge is used for showing data, changing its dimension on a window resize might not display the data in a proper way. That is why the RadGauge does not support setting its width and height in percents.
What you can do in this case is to use RadGauge's client-side API
. The same approach could be applied to the RadGauge in exactly the same way with little modifications.
Could you please try this scenario and inform me if you were able to apply it in your case?
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed