@svisveswaraiya_285745,
If you take the approach of loading the ThingWorx CSV Parser Extension, you can write your own service. Having the extension loaded will allow you to create a Service on a Thing. This service can be designed to meet your needs.
From our conversation I would guess that you have an InfoTable which contains all the information you wish to export. The service would need to have some type of loop to work through the information and create a sub infotable which can then be passed to:
Resources["CSVParserFunctions"].WriteCSVFile(params);
This will create a file for that sub table. You will then need to loop and perform the next segment.
Because you have created a unique service to generate the number of files you need. then the service can be activated by a single button push.
HTH
Pehowe