xml创建问题，着急，在线等！！

Question

            System.IO.FileStream xmlFileStream = new System.IO.FileStream(mXmlFileName, System.IO.FileMode.Create);
            ////创建Writer文本流
            System.Xml.XmlTextWriter xmlWriter = new System.Xml.XmlTextWriter(xmlFileStream, System.Text.Encoding.Default);
            //////写出xml标题头            xmlWriter.WriteStartDocument(true);
           
            xmlWriter.WriteStartAttribute("xmlns", null, "http://www.w3.org/2000/10/XMLSchema");
            xmlWriter.WriteEndAttribute();
            xmlWriter.WriteAttributeString("xmlns", "po", null, "http://contoso.com/po");
            xmlWriter.WriteEndAttribute();
            xmlWriter.WriteStartElement("DataSetProjects", "11", "http://passport.kubao.com");
            MessageBox.Show("ok");
            string fileName=mXmlFileName;
看看是哪错了？老出错报错为：处于状态 Prolog 的标记 StartAttribute 将导致无效的 XML 文档。

Answer 1

这样创建头要好些吧                //Generate Xml Document
                System.Xml.XmlDocument xmldoc;
                System.Xml.XmlNode nRoot, nNode;
                xmldoc = new XmlDocument();
                //xml头
                xmldoc.AppendChild(xmldoc.CreateXmlDeclaration("1.0", "utf-8", ""));
                //Root根节点
                nRoot = xmldoc.CreateNode(XmlNodeType.Element, "Records", "");
//                 .........往nRoot中加入其它子节点
                xmldoc.AppendChild(nRoot);

Answer 2

常用创建xml文件的两种方法：1、XmlDocument ：
    XmlDocument doc = new XmlDocument();
    ............
    doc.Save("data.xml");2、XmlWriter:
   XmlWriter writer = XmlWriter.Create("output.xml");
  writer.WriteStartElement("book");
  writer.WriteElementString("price", "19.95");
  writer.WriteEndElement();
  writer.Flush();

Answer 3

xmlWriter.WriteStartDocument(true);
           
            xmlWriter.WriteStartAttribute("xmlns", null, "http://www.w3.org/2000/10/XMLSchema");
            xmlWriter.WriteEndAttribute();
            xmlWriter.WriteAttributeString("xmlns", "po", null, "http://contoso.com/po");
            xmlWriter.WriteEndAttribute();
            xmlWriter.WriteStartElement("DataSetProjects", "11", "http://passport.kubao.com");
开始不能是属性