创建xml文件，对xml文件进行添加新节点、删除节点、更新节点。创建的如下的xml文件。
<?xml version="1.0" encoding="UTF-8"?> -<FileItems> -<FileInfo fileid="12jdkfjdkfkdfjkdfj"> <FileName>test.txt</FileName> <last_seen>2014-06-09 10:30</last_seen> <pushFileStaus>完成</pushFileStaus> <ActionType>上传</ActionType> <logFilePath>C: est.txt</logFilePath> <SavedSize>1200</SavedSize> <localFilePath>C: est.txt</localFilePath> <HostIP>172.19.8.121</HostIP> <Port>999</Port> </FileInfo>
对xml文件进行查找，可以使用using System.Xml.Linq;命名空间中的XElement(XName)类，使用myXElement.Elements().Where(node => node.Attribute("fileid").Value == "12jdkfjdkfkdfjkdfj");其中myXElement是XElement的实例对象、fileid是xml节点属性名，“12jdkfjdkfkdfjkdfj”是属性的值。
/// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } string FullPath = string.Format(@"{0}{1}{2}", Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "FilePulla", "history.xml"); /// <summary> /// 创建xml文件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, RoutedEventArgs e) { FileInfo xmlFile= new FileInfo(FullPath); XmlTextWriter xmlWriter = new XmlTextWriter(xmlFile.FullName, Encoding.UTF8); xmlWriter.WriteStartDocument(); xmlWriter.WriteStartElement("FileItems"); xmlWriter.WriteStartElement("FileInfo"); xmlWriter.WriteAttributeString("fileid", "12jdkfjdkfkdfjkdfj"); xmlWriter.WriteElementString("FileName", "test.txt"); xmlWriter.WriteElementString("last_seen", "2014-06-09 10:30"); xmlWriter.WriteElementString("pushFileStaus", "完成"); xmlWriter.WriteElementString("ActionType", "上传"); xmlWriter.WriteElementString("logFilePath", "C: est.txt"); xmlWriter.WriteElementString("SavedSize", "1200"); xmlWriter.WriteElementString("localFilePath", "C: est.txt"); xmlWriter.WriteElementString("HostIP", "172.19.8.121"); xmlWriter.WriteElementString("Port", "999"); xmlWriter.WriteEndElement(); //////////////////////////////////////////////////////////////////// xmlWriter.WriteStartElement("FileInfo"); xmlWriter.WriteAttributeString("fileid", "12jdkfjdkfkdfjkdfj"); xmlWriter.WriteElementString("FileName", "test.txt"); xmlWriter.WriteElementString("last_seen", "2014-06-09 10:30"); xmlWriter.WriteElementString("pushFileStaus", "完成"); xmlWriter.WriteElementString("ActionType", "上传"); xmlWriter.WriteElementString("logFilePath", "C: est.txt"); xmlWriter.WriteElementString("SavedSize", "1200"); xmlWriter.WriteElementString("localFilePath", "C: est.txt"); xmlWriter.WriteElementString("HostIP", "172.19.8.121"); xmlWriter.WriteElementString("Port", "999"); xmlWriter.WriteEndElement(); xmlWriter.WriteFullEndElement(); xmlWriter.WriteEndDocument(); xmlWriter.Close(); } /// <summary> /// 在已存在的文件上，添加新节点 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, RoutedEventArgs e) { if (File.Exists(FullPath)) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(FullPath); XmlNode root = xmlDoc.SelectSingleNode("FileItems"); //查找<bookstore> XmlElement element = xmlDoc.CreateElement("FileInfo"); element.SetAttribute("fileid", "12jdkfjdkfkdfjkdfjere"); XmlElement xesub1 = xmlDoc.CreateElement("FileName"); xesub1.InnerText = "test.txt"; element.AppendChild(xesub1); //设置文本节点 XmlElement xesub10 = xmlDoc.CreateElement("last_seen"); xesub10.InnerText = "2014-06-09 11:35"; element.AppendChild(xesub10); XmlElement xesub2 = xmlDoc.CreateElement("pushFileStaus"); xesub2.InnerText = "test.txt"; element.AppendChild(xesub2); XmlElement xesub3 = xmlDoc.CreateElement("ActionType"); xesub3.InnerText = "test.txt"; element.AppendChild(xesub3); XmlElement xesub4 = xmlDoc.CreateElement("logFilePath"); xesub4.InnerText = "test.txt"; element.AppendChild(xesub4); XmlElement xesub5 = xmlDoc.CreateElement("SavedSize"); xesub5.InnerText = "test.txt"; element.AppendChild(xesub5); XmlElement xesub6 = xmlDoc.CreateElement("localFilePath"); xesub6.InnerText = "test.txt"; element.AppendChild(xesub6); XmlElement xesub7 = xmlDoc.CreateElement("HostIP"); xesub7.InnerText = "test.txt"; element.AppendChild(xesub7); XmlElement xesub8 = xmlDoc.CreateElement("HostIP"); xesub8.InnerText = "test.txt"; element.AppendChild(xesub8); XmlElement xesub9 = xmlDoc.CreateElement("Port"); xesub9.InnerText = "test.txt"; element.AppendChild(xesub9); root.AppendChild(element); xmlDoc.Save(FullPath); } } /// <summary> /// 删除节点 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, RoutedEventArgs e) { XElement xmlDoc = XElement.Load(FullPath); XElement selectedElement = xmlDoc.Elements().Where(xl => xl.Attribute("fileid").Value == "12jdkfjdkfkdfjkdfjere").FirstOrDefault(); if (selectedElement == null) return; selectedElement.Remove(); xmlDoc.Save(FullPath); } /// <summary> /// 修改节点的值 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button5_Click(object sender, RoutedEventArgs e) { XElement xmlDoc = XElement.Load(FullPath); XElement selectedElement = xmlDoc.Elements().Where(xl => xl.Attribute("fileid").Value == "12jdkfjdkfkdfjkdfjere").FirstOrDefault(); if (selectedElement == null) return; selectedElement.Elements("pushFileStaus").FirstOrDefault().SetValue("完成"); xmlDoc.Save(FullPath); } }