LinQ to SQL : Update on table data not working

Question

I have a LinQ query which is intended to Update the table concerned.

The code is as follows:

LINQHelperDataContext PersonalDetails = new LINQHelperDataContext();
var PerDetails1 = (from details in PersonalDetails.W_Details_Ts
                         where details.UserId == userId 
                         select details).First();
PerDetails1.Side = "Bridge";
PerDetails1.TotalBudget = 4000000;
PersonalDetails.SubmitChanges();

However, this change/update does not get reflected in the DB. Also,this does not throw any exception.Please suggest.

Answer 1

Make sure W_Details_Ts has one (or more) member properties marked as primary key. L2S can't generate update or delete statements if it does not know the underlying table's PK member(s).