protected void btnSave_Click(object sender, EventArgs e)
        {
            string RoleId      = ddlRoles.SelectedValue;
            string RolesString = ComposeRolesString();

            if (Convert.ToInt32(RoleId) < 0)
            {
                ShowFailMessage();
            }
            else
            {
                Classes.CRoles cr = new Classes.CRoles();
                if (cr.AssignPermissionsToRoles(Convert.ToInt32(RoleId), RolesString) < 0)
                {
                    ShowFailMessage();
                }
                else
                {
                    ShowSuccessMessage();
                }
            }
        }