Hi Mia,
Thank you for your interest in Syncfusion products.
I am afraid that I am not able to reproduce the issue. After export to Data table, it’s returning the correct column name. It’s not returning the generic column name.
Here is the sample for your reference:
http://websamples.syncfusion.com/samples/XlsIO.Windows/F73461/main.htm Please take a look into the sample and let me know the modified sample to reproduce the issue in our end.
Best Regards,
Bhuvana