20080717 XmlSerializer Deserialize xml
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~~类序列化
ftp p = new ftp();
            //串行化对象
            System.Xml.Serialization.XmlSerializer xmlSer = new XmlSerializer(p.GetType());

            p.ip = "124";
            p.port = "sdf";
            XmlSerializerNamespaces namespaceSerializer = new XmlSerializerNamespaces();
            namespaceSerializer.Add("", ""); //REMOVE mlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:ns="http://mycompany.com/"
            using (StringWriter sw = new StringWriter())
            {
                XmlWriterSettings settings = new XmlWriterSettings();
                //settings.OmitXmlDeclaration = true; // Remove the <?xml version="1.0" encoding="utf-8"?>

                XmlWriter xtw = XmlWriter.Create(sw, settings);
                //XmlTextWriter xtw = new XmlTextWriter(sw,);
                xmlSer.Serialize(xtw, p, namespaceSerializer);
                System.Diagnostics.Trace.WriteLine(sw.ToString());
                sw.Close();

~~类反序列化
  string xmlMarkup = at "<ftp ip=""124"" port=""sdf"" />";

            XmlSerializer xmlSerializer = new XmlSerializer(typeof(ftp));

            ftp usenetGoddy = (ftp)xmlSerializer dot Deserialize(new StringReader(xmlMarkup));

            Console.WriteLine("Created { 0 }, Name: { 1 }", usenetGoddy, usenetGoddy.ip);
~
//生成xml字符串：
            using (StringWriter sw = new StringWriter())
            {
                XmlTextWriter xtw = new XmlTextWriter(sw);
                xtw.Formatting = Formatting.Indented;
                //xtw.WriteStartDocument(); //去掉XML头信息

                xtw.WriteStartElement("sysinfo");

                //test
                xtw.WriteStartElement("ftp");
                xtw.WriteAttributeString("ip", "wwqr");
                xtw.WriteAttributeString("port", "123");
                xtw.WriteEndElement();

                        string result = sw.ToString();

                System.Diagnostics.Trace.WriteLine(result);
~~取信息
XmlTextReader tr = new XmlTextReader( at "<login value=""fail"" errorcode=""xxx""/>",XmlNodeType dot Element, null);
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(tr);
            tr.Close();
            XmlNode xm = xmlDoc.SelectSingleNode("login");
            System.Diagnostics.Trace.WriteLine(xm.Attributes["value"].Value.ToString());

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