public void xmlWrite(string invoid, string date,
string soldprice, string groupid, string cid, string uid)
{
XmlDocument xmlDoc = new XmlDocument();
XmlNode rootNode = xmlDoc.CreateElement("invoice-"+ invoid);
xmlDoc.AppendChild(rootNode);
XmlNode userNode = xmlDoc.CreateElement("IssureDate");
userNode.InnerText = date;
rootNode.AppendChild(userNode);
XmlNode userNode2 = xmlDoc.CreateElement("SoldPrice");
userNode2.InnerText = soldprice;
rootNode.AppendChild(userNode2);
XmlNode userNode3 = xmlDoc.CreateElement("GroupID");
userNode3.InnerText = groupid;
rootNode.AppendChild(userNode3);
XmlNode userNode4 = xmlDoc.CreateElement("CustomerID");
userNode4.InnerText = cid;
rootNode.AppendChild(userNode4);
XmlNode userNode5 = xmlDoc.CreateElement("SystemUserID");
userNode5.InnerText = uid;
rootNode.AppendChild(userNode5);
xmlDoc.Save(Server.MapPath("~")+"/XMlDOcs/invoice"+invoid+".xml");
}