protected void UserCourseDetailsView_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Select")
        {
            int rowIndex = Convert.ToInt32(e.CommandArgument);

            GridViewRow row = UserCourseDetailsView.Rows[rowIndex];

            UserBO ob = new UserBO();
            ob.userid       = Session["User"].ToString();
            ob.coursecode   = row.Cells[1].Text;
            ob.registered   = "Y";
            ob.courseopened = "N";
            clsBLL obj = new clsBLL();
            if (obj.isregisteredBLL(ob) == 0)
            {
                obj.onregistrationcourseBLL(ob);
                obj.activateStatusBLL(ob);
            }
            Session["CourseSelected"] = row.Cells[1].Text;

            Response.Redirect("UserSelectedCoursePage.aspx");
        }
    }