BLL.PowerBLL powerbll = new BLL.PowerBLL();
                checkpower.DataSource = powerbll.GetAllList();
                checkpower.DisplayMember = "pname";
                checkpower.ValueMember = "pvalue";

  for (int i = 0; i <checkpower.Items.Count; i++)
                    {
                        if (value.rpower.Contains(((Model.PowerInfo)checkpower.Items[i]).pvalue))
                        {
                            checkpower.SetItemChecked(i, true);
                        }
                        else
                        {
                            checkpower.SetItemChecked(i, false);
                        }
                    }