Note that RadVirtualGrid does not load the entire data, it only requests the data that should be currently visible. That is why this control does not provide any export functionality.
There is no need to use UI control just to create and export to a file the data coming from an external data source. You can use our RadSpreadStreamProcessing library to create such files, however, you will need to iterate all rows in your data source. Detailed information is available here: RadSpreadStreamProcessing.
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Dess | Tech Support Engineer, Sr.
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