to pass the path of pdf file to button in datagridview

I have created a table, it has 6 columns which contains path of pdf files(BUT AT A TIME I'm  DISPLAYING ONLY TWO COLUMNS IN GRIDVIEW i.e DATE column & the one which contains PATH ). I displaying this data in datagridview, where I have taken a button in gridvew. and I want to pass the path of one column to that button so that when that button get clicked it will display the respective pdf file in adobe pdf reader.

So the problem is that, only I dont know how to pass the path to that button. Please Help Me I Just want to Know How i can pass the path to button .