I don't think it is possible to get the absolute path in case of a drag and drop feature due to security reasons. However you can try decoding the base64 encoded stream using the Base64Decode function available in Pega and see if it helps.
Thanks for your suggestion. In a normal case, decoding the stream works fine but in my case, i am uploading an EXCEL file with extension .xls or .xlsx
so, once i get the stream, i need to convert it back to the MS Excel workbook object, as my requirement is to parse an excel sheet and read the cell value by cell address and not to iterate over each row.
Could you please help me with any solution on this?