C# code:
/// <summary>
/// 将发帖内容保存到XML文件中的方法
/// </summary>
/// <param name="filename">XML文件路径全名</param>
/// <param name="title">XML文件路径全名</param>
/// <param name="content">XML文件路径全名</param>
/// <param name="user">XML文件路径全名</param>
public void AddXML(string filename,string title,string content,string user)
{
//初始化XML文档操作类
XmlDocument mydoc = new XmlDocument();
//加载指定的XML文件
mydoc.Load(filename);
//添加元素-帖子主题
XmlElement ele = mydoc.CreateElement("title");
XmlText text = mydoc.CreateTextNode(title);
//添加元素-发帖时间
XmlElement ele1 = mydoc.CreateElement("posttime");
XmlText text1 = mydoc.CreateTextNode(DateTime.Now.ToString());
//添加元素-内容
XmlElement ele2 = mydoc.CreateElement("content");
XmlText text2 = mydoc.CreateTextNode(content);
//添加元素-发帖人
XmlElement ele3 = mydoc.CreateElement("postuser");
XmlText text3 = mydoc.CreateTextNode(user);
//添加文件的节点-msgrecord
XmlNode newElem = mydoc.CreateNode("element", "xmlrecord", "&qu
