HiRalph,
Thank you for your patience.
Issue 1:Is there a way to name the worksheets that are created?
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Please refer the below code snippet to name a worksheet after it was created.
workBook.Worksheets[0].Name = "S1";
Issue 2: Problem in Percentage Column value.
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Percentage cell value is perfectly converted and displayed as correct value in excel(60% in grid is displayed as 60% in excel).Here is the minimal sample which shows this issue.
http://websamples.syncfusion.com/samples/Grid.Windows/F44533/main.htmPlease let me know if this helps.
Best Regards,
Srirajan