Save web form data to disk file

Question

I am developing an information system that store community members details in it's municipal area. it's client server system. these data are just about members information such as name,dob,sex,no of members in the family, education level, how long living in this area...etc.same data set about members are being entered to different website everyday(this is maintaining by another authority). i dont want my client to enter same data twice. what method i can use to save web form data to disk file(directly to sql server so that local system can fetch data rather retyping).
language :c#
sql server
EF 4.0