Hi every body!!!!

After uploading a csv file for a json field, i want to know how to save that data in the data base??

In fact, i am preparing a new web module ( new widget) and i want to import csv file for a json field that i have created. Every thing is ok till now. But, the only problem is how to save the data in the data base.

Can anyone suggest an answer please. Thansks ;)