async void RemoveUser(IEnumerable <Row> p_rows)
{
var roleID = _lvRole.SelectedRow.ID;
List <long> users = (from r in p_rows
select r.Long("userid")).ToList();
if (users.Count > 0 && await AtCm.RemoveRoleUsers(roleID, users))
{
_lvUser.Data = await AtCm.Query("角色-关联用户", new { roleid = roleID });
}
}