Hi Chin,
Thank you for your interest in Syncfusion product.
The Excel import is done using a class called ExcelEngine.
A Workbook will be created for the application using IApplication, and the workbook holds all the WorkSheet of the Excel.
So the collection is maintained using WorkSheets object, to retrive a specific sheet of the ExcelEngine it can be retrieved from the WorkSheets collection.
Please refer the below samples:
GDBGImportExcelLet me know if you have any queries.
Regards,
Nirmal