Posted 30 Nov 2012 Link to this post
Posted 05 Dec 2012 Link to this post
I suppose the reason for this issue is that your merged headers are not loaded. Note that the RadGridView will export only the loaded elements. May I ask you why do you need to clone your grid?
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Posted 06 Dec 2012 Link to this post
It turns out that the merged headers rely on the already rendered GridView's Columns.