public void UpdateDiscountCodes(String xmlAjaxData)
{
var discountcodesList = NBrightBuyUtils.GetGenXmlListByAjax(xmlAjaxData, "");
// build xml for data records
var strXml = "<genxml><discountcodes>";
foreach (var discountcodesInfo in discountcodesList)
{
strXml += discountcodesInfo.XMLData;
}
strXml += "</discountcodes></genxml>";
// replace models xml
DataRecord.ReplaceXmlNode(strXml, "genxml/discountcodes", "genxml");
DiscountCodes = GetEntityList("discountcodes");
}