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With our release form Q2 2014 we have released a new component RadSpreadProcessing
which allows you to create, load and modify documents to Xlsx, Csv, Tab-delimited file formats as well as export them to Pdf format without using 3rd party libraries. You can learn more about it following this link: RadSpreadProcessing documentation article
You may additionally see how to integrate RadGridView with RadSpreadProcessing and export it to Pdf in our online demo for Telerik UI for Silverlight
You can learn more about customizing how the content is split into pages both vertically and horizontally on this link for WorksheetPageSetup
I hope this helps. Don't hesitate to contact us again.
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