This Description is not Enough For Understand But You Can Try This:-
First Of All If You Want This at Same Form Do This this Code is verty Easy But also very Rare on google
Bind Your Link Button at Binding Time Like
onclick="GetData('<%# Eval("ID")%>','<%# Eval("ADDRESS")%>','<%# Eval("PHONE")%>');"
Now Values Wiil not be Shown in Grid But You Can Use These Without Postback
Pls Let Me Know if This Helps.