How to get record back

In my application I am displaying records from 5 or 6 tables on a single page using view model in mvc.records are displaying but if I want to update any record of any table I can't do it. The scenario is if I want to update any record corresponding to Id,i need to click on that record then fetch this record from database then display these records in different text boxes with update button provided in a separate panel(this panel is actually hidden on page load and when user clicks on the record button to fetch record from database this panel will display related data from database). I am unable to do this work.i hope everyone can understand my described scenario and help me accordingly. Please help me out.