private void bindGroupList(int gId)
        {
            try
            {
                cls_Groups group = new cls_Groups();
                group.CompanyId = Convert.ToInt16(ddlCompanySelect1.SelectedValue);
                DataTable dt = group.SelectByCompanyId();

                if (gId > 0)
                {
                    DataRow[] _row = dt.Select("GroupId=" + gId);

                    if (_row.Count() > 0)
                    {
                        ddlCompanySelect1.SelectedValue = _row[0]["CompanyId"].ToString();
                        ddlGroup.DataSource = dt;
                        ddlGroup.DataBind();
                        ddlGroup.SelectedValue = gId.ToString();

                        ddlCompanySelect1.Enabled = false;
                        ddlGroup.Enabled = false;
                        return;
                    }
                }

                DataRow dtRow = dt.NewRow();
                dtRow["GroupName"] = "-- Lựa chọn --";
                dtRow["GroupId"] = "0";
                dt.Rows.InsertAt(dtRow, 0);

                ddlGroup.DataSource = dt;
                ddlGroup.DataBind();
                ddlGroup.SelectedValue = "0";
            }
            catch (Exception ex)
            {
            }
        }