在C#中如何创建写入XML文件示例

（1）创建XML文件:
protected void CreateXML(){ string fileName = Server.MapPath(".//ErrorLog//ErrorLog.xml"); XmlTextWriter myWriter = new XmlTextWriter(fileName, Encoding.UTF8); myWriter.Formatting = Formatting.Indented; myWriter.WriteStartDocument(); //start Document myWriter.WriteStartElement("ErrorDocument"); //start writer first Element myWriter.WriteStartElement("ErrorLog"); myWriter.WriteStartElement("DataTime"); myWriter.WriteString("这个节点用来描述错误发生的时间！"); myWriter.WriteEndElement(); myWriter.WriteStartElement("ErrorMessage"); myWriter.WriteString("记录出错的信息！"); myWriter.WriteEndElement(); myWriter.WriteStartElement("Operator"); myWriter.WriteString("记录出错的操作用户！"); myWriter.WriteEndElement(); myWriter.WriteStartElement("Model"); myWriter.WriteString("记录发生错误的模块！"); myWriter.WriteEndElement(); myWriter.WriteEndElement(); myWriter.WriteEndElement(); //end writer first Element myWriter.WriteEndDocument(); //end Document myWriter.Flush(); myWriter.Close();}　 　
(2）将错误日志写入刚创建的xml文件中
public void WriteErrorLog(string message,string operater,string module){ FileInfo fileinfo = new FileInfo(Server.MapPath(".//ErrorLog//ErrorLog.xml")); if(!fileinfo.Exists) //日志文件不存在时创建文件 { this.CreateXML(); } string time = DateTime.Now.ToString(); XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(Server.MapPath(".//ErrorLog//ErrorLog.xml")); XmlNode root=xmlDoc.SelectSingleNode("ErrorDocument");//查找<ErrorDocument> XmlElement xe1=xmlDoc.CreateElement("ErrorLog");//创建一个<ErrorLog>节点 XmlElement xesub1=xmlDoc.CreateElement("DataTime"); xesub1.InnerText=time;//设置文本节点 xe1.AppendChild(xesub1);//添加到<ErrorLog>节点中 XmlElement xesub2=xmlDoc.CreateElement("ErrorMessage"); xesub2.InnerText=message; xe1.AppendChild(xesub2); XmlElement xesub3=xmlDoc.CreateElement("Operator"); xesub3.InnerText=operater; xe1.AppendChild(xesub3); XmlElement xesub4=xmlDoc.CreateElement("Model"); xesub4.InnerText=module; xe1.AppendChild(xesub4); root.AppendChild(xe1); xmlDoc.Save(Server.MapPath(".//ErrorLog//ErrorLog.xml"));} private string xmlread() { XmlTextReader reader = new XmlTextReader(Server.MapPath("QuestionConfig.xml")); string resault = ""; while (reader.Read()) { if (reader.LocalName.Equals("站点标题")) { resault += reader.ReadString(); } } return resault; }

当然别忘记导入已下两个命名空间：

using System.IO;
using System.Xml;