InfoPath Dev

I have an issue of debugging webservice. How to debug the webservice that is connected with infopath form in my local computer? now I can only test my webservice by converting it into .wsp package and deploying it into the sharepoint environment but I couldnot debug it.

how to write a code to deal with multiple selected listbox and update multiple data in database at once? OR, how to make functionality in infopath so that it can send a form multiple times through one submit button and update database? for example: if user checked on 3 checkbox of multiple selection list box then when user click submit then it ...

I need to add new record from infopath form to database. Infopath form has dropdown list and multiselected listbox. And then infopath is submitted to web service where there is code to submit data and add new record in sql server database. When I put only dropdown list, then it will update data to database but when I put multiselected listbox ...