Hi Deepa,
The issue "HeaderText is not exporting to excel" was a known issue in older versions, but it is fixed in from versions 7.2.0.20 onwards. You could download the same from the below location from our website:
http://www.syncfusion.com/downloads/version-historyYou can workaround this issue in order to work with older versions by assigning the HeaderText to the Text property of the corresponding cells in the sheet.
Please refer the below sample for more details.
http://websamples.syncfusion.com/samples/Grid.Windows/Grid_WF_ExcelExport/main.htmPlease let me know if this helps.
Regards,
Jisha