how to get specific user details once we login

Question

Hi,

    i created one master page and login page.once i login ,im able to get the username.

Example:

 if (Session["usename"] != null)

            {

                lbllogout.Text = "Welcome :" + Session["usename"].ToString();

            }

Now,i want to get the complete details of user once i login(i want to show it in gridview)