Hi Megumi,
Thank you very much for your patience.
It is the default behaviour of our XlsIO. While saving the file we will be closing the response inorder to avoid the threadabort exception thrown in the application level for excel 2007 and 2010. Similarly the response will be flushed for excel 2003.
We have added the custom method to meet your requirement.I have attached the tested sample for the same along with this update. Please try this sample and let us know whether this helps you.
Please let us know if you have any clarifications.
Thanks,
Jawahar.
SaveMethod_46643233.zip