What's the best method to choose per my requirement to store the values

Question

I have a grid view with some data and check boxes. Assume that my data is as follows:

Checkbox	EmpID	PayID
	123	1
	1234	1
	1234	2

I would like to store the corresponding PayID values as per the EmpID exists. If I select both from the check boxes available I would like to check which payid belongs to which EmpID can any one give me an idea to implement this please.