You can access office documents only if office COM objects (means office) is installed on the machine.
One option is using of Open.XML (why don't you want to use it?) and another option is to use Office365. However the later one would probably change the whole architecture of you application.
One workaround might be to save Excel file as HTML and read it as HTML. This will not give you all of Open.XML and COM power, but you can very easy access and change data.
Hi,
Thanks for Posting.
I Believe the same question has been Answered at
StackOverflow.
You can further refer to the following
Thread.
Regards,
Nithin Rathnakar