Thanks for your reply on my query. I was trying using the second option suggested by you i.e. calling the ChildrenOfType<RadButton>() extention method to get the list of all buttons.
However, the problem is that below statement returns me null list:
> lstButton = expData.ChildrenOfType<
I have this statement in the constructor of my silverlight page. However, if I write this statement in 'ExpressionChanged" event of expression editor, it works. I get list of all buttons using above code in this event method. But I would like to show some of the buttons disabled when page loads so that user cannot select those buttons. Above code works in 'ExpressionChanged" event which I don't want.
It would be great if you could please also use a code snippet in your response.