XML文件内容如下：
<?xml version="1.0" encoding="utf-8"?><keys> <key> <keyname>2</keyname> <musicsource>CD</musicsource> <musicaddr>2</musicaddr> <playway>播放</playway> </key> <key> <keyname>5</keyname> <musicsource>MP3</musicsource> <musicaddr>7</musicaddr> <playway>停止</playway> </key> <key> <keyname>3</keyname> <musicsource>MP3</musicsource> <musicaddr>8</musicaddr> <playway>播放</playway> </key> <key> <keyname>1</keyname> <musicsource>MP3</musicsource> <musicaddr>1</musicaddr> <playway>连续播放</playway> </key> <key> <keyname>4</keyname> <musicsource>调谐器</musicsource> <musicaddr>1</musicaddr> <playway>循环单曲</playway> </key></keys>
将XML节点读到LISTVIE上：
private void int_6243() 
...{
this.list_6243.Items.Clear(); try
...{ XmlDocument MyXMLDoc = new XmlDocument(); MyXMLDoc.Load(Application .StartupPath + "/XML_6243.xml"); XmlNodeList MyNodes = MyXMLDoc.GetElementsByTagName("keyname"); foreach (XmlNode MyNode in MyNodes) ...{ string[] subItem =...{ MyNode.InnerText, "", "", "" }; this.list_6243.Items.Add(new ListViewItem(subItem)); 
} // this.list_6243.Sorting = SortOrder.Ascending; MyNodes = MyXMLDoc.GetElementsByTagName("musicsource"); int i = 0; foreach (XmlNode MyNode in MyNodes) ...{ this.list_6243.Items[i++].SubItems[1].Text = MyNode.InnerText; } MyNodes = MyXMLDoc.GetElementsByTagName("musicaddr"); i = 0; foreach (XmlNode MyNode in MyNodes) ...{ this.list_6243.Items[i++].SubItems[3].Text = MyNode.InnerText; } MyNodes = MyXMLDoc.GetElementsByTagName("playway"); i = 0; foreach (XmlNode MyNode in MyNodes) ...{ this.list_6243.Items[i++].SubItems[2].Text = MyNode.InnerText; } } catch (Exception ex) ...{ MessageBox.Show(ex.Message); } 
}
添加新节点到XML：
private void btn6243_Click(object sender, EventArgs e) ...{ if (this.numAddr.Value != 0 && this.comMusic.Text != "" && this.numKey.Value != 0 && this.comPlayWay.Text != "") ...{ XmlDocument MyXMLDoc = new XmlDocument(); MyXMLDoc.Load(Application .StartupPath + "/XML_6243.xml"); try ...{ string myfind = this.numKey.Value.ToString(); string myfindstring = "keys/key [keyname=" + '"' + myfind + '"' + "]"; XmlNode MyNode = MyXMLDoc.SelectSingleNode(myfindstring); if (MyNode != null) ...{ MyXMLDoc.DocumentElement.RemoveChild(MyNode);//检查节点是否已经存在，存在的话则删除 } XmlElement MyNewKey = MyXMLDoc.CreateElement("key");//新建节点 XmlElement MyKeyName = MyXMLDoc.CreateElement("keyname");//键码 MyKeyName.InnerText = this.numKey.Value.ToString(); MyNewKey.AppendChild(MyKeyName); XmlElement MyMusicSource = MyXMLDoc.CreateElement("musicsource");//音源 MyMusicSource.InnerText = this.comMusic.Text; MyNewKey.AppendChild(MyMusicSource); XmlElement MyPlayWay = MyXMLDoc.CreateElement("musicaddr");//音源地址 MyPlayWay.InnerText = this.numAddr.Value.ToString(); MyNewKey.AppendChild(MyPlayWay); XmlElement MyMusicAddr = MyXMLDoc.CreateElement("playway");//播放方式 MyMusicAddr.InnerText = this.comPlayWay.Text; MyNewKey.AppendChild(MyMusicAddr); MyXMLDoc.DocumentElement.AppendChild(MyNewKey); //插入节点 XmlTextWriter MyWriter = new XmlTextWriter(Application .StartupPath + "/XML_6243.xml", null); MyWriter.Formatting = Formatting.Indented; MyXMLDoc.WriteContentTo(MyWriter); MyWriter.Close(); } catch (Exception ex) ...{ MessageBox.Show(ex.Message); } this.int_6243(); } else MessageBox.Show("信息没有填写完整，请检查！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); }
删除XML节点：
void menu_Click(object sender, EventArgs e) ...{ //throw new Exception("The method or operation is not implemented."); try ...{ string strvalue = this.list_6243.SelectedItems[0].SubItems[0].Text; XmlDocument MyXMLDoc = new XmlDocument(); MyXMLDoc.Load(Application .StartupPath + "/XML_6243.xml"); string strPath = "keys/key [keyname=" + '"' + strvalue + '"' + "]"; XmlNode node = MyXMLDoc.SelectSingleNode(strPath); if (node != null) ...{ MyXMLDoc.DocumentElement.RemoveChild(node); /**//* XmlTextWriter MyWriter = new XmlTextWriter(Application .StartupPath + "/XML_6243.xml", null); MyWriter.Formatting = Formatting.Indented; MyXMLDoc.WriteContentTo(MyWriter); MyWriter.Close();*/ MyXMLDoc.Save(Application .StartupPath + "/XML_6243.xml"); } MessageBox.Show("键码"+strvalue +"删除成功！","