操作xml（C#）

xml结构

<?xml version="1.0" encoding="UTF-8"?>
<dataTable>
  <node id="201603220952208053861">
    <title>关于软件</title>
    <type>test</type>
    <addTime>2016-03-22 09:52:20</addTime>
    <editTime>2016-03-22 09:52:20</editTime>
    <content>产品：node
版本：1.0
作者：HUJQ</content>
  </node>
  <node id="201603220952563455956">
    <title>test</title>
    <type>测试</type>
    <addTime>2016-03-22 09:52:56</addTime>
    <editTime>2016-03-22 09:52:56</editTime>
    <content>测试</content>
  </node>
</dataTable>

xml类

public class XmlHelper
    {
        private XmlDocument objXmlDoc = new XmlDocument();
        private string XmlFile;
        public XmlHelper(string XmlFile)
        {
            this.XmlFile = XmlFile;
            if (!File.Exists(XmlFile))
            {
                creatXml();
            }

            objXmlDoc.Load(XmlFile);
        }

        #region 创建xml文件
        private void creatXml()
        {
            //加入XML的声明段落,<?xml version="1.0" encoding="UTF-8"?>  
            XmlDeclaration xmldecl = objXmlDoc.CreateXmlDeclaration("1.0", "UTF-8", null);
            //添加上述创建和 xml声明节点
            objXmlDoc.AppendChild(xmldecl);
            //创建xml dbGuest 元素（根节点）
            XmlElement xmlelem = objXmlDoc.CreateElement("", "dataTable", "");
            objXmlDoc.AppendChild(xmlelem);
            try
            {
                objXmlDoc.Save(XmlFile);
            }
            catch (Exception ex) { }

            Node node = new Node()
            {
                id = getID(),
                title = "关于软件",
                type = "test",
                addTime = getDateString(),
                editTime = getDateString(),
                content = "产品：node
版本：1.0
作者：HUJQ"
            };
            addXml(node);
        }
        #endregion

        #region 读xml文件
        public List<Node> readXml()
        {
            List<Node> nodeList = new List<Node>();
            XmlNode root = objXmlDoc.SelectSingleNode("dataTable");// 得到根节点
            XmlNodeList xmlNodeList = root.ChildNodes;// 得到根节点的所有子节点
            foreach (XmlNode xnl in xmlNodeList)
            {
                Node node = new Node();
                // 将节点转换为元素，便于得到节点的属性值
                XmlElement xe = (XmlElement)xnl;
                // 得到id属性的属性值
                node.id = xe.GetAttribute("id");
                node.title = xe.GetElementsByTagName("title")[0].InnerText;
                node.type = xe.GetElementsByTagName("type")[0].InnerText;
                node.addTime = xe.GetElementsByTagName("addTime")[0].InnerText;
                node.editTime = xe.GetElementsByTagName("editTime")[0].InnerText;
                node.content = xe.GetElementsByTagName("content")[0].InnerText;
                nodeList.Add(node);
            }
            return nodeList;
        }
        #endregion

        #region 添加xml
        public void addXml(Node node)
        {
            XmlNode root = objXmlDoc.SelectSingleNode("dataTable");
            XmlElement xe1 = objXmlDoc.CreateElement("node");//创建一个<Node>节点
            xe1.SetAttribute("id", node.id);//设置该节点genre属性

            XmlElement xesub1 = objXmlDoc.CreateElement("title");
            xesub1.InnerText = node.title;//设置文本节点   
            xe1.AppendChild(xesub1);//添加到<Node>节点中   

            XmlElement xesub2 = objXmlDoc.CreateElement("type");
            xesub2.InnerText = node.type;
            xe1.AppendChild(xesub2);

            XmlElement xesub3 = objXmlDoc.CreateElement("addTime");
            xesub3.InnerText = node.addTime;
            xe1.AppendChild(xesub3);

            XmlElement xesub4 = objXmlDoc.CreateElement("editTime");
            xesub4.InnerText = node.editTime;
            xe1.AppendChild(xesub4);

            XmlElement xesub5 = objXmlDoc.CreateElement("content");
            xesub5.InnerText = node.content;
            xe1.AppendChild(xesub5);

            root.AppendChild(xe1);//添加到<Employees>节点中

            //保存创建好的XML文档  
            objXmlDoc.Save(XmlFile);
        }
        #endregion

        #region 删除xml
        public void delXml(string id)
        {
            XmlNodeList xmlNodeList = objXmlDoc.SelectSingleNode("dataTable").ChildNodes;
            foreach (XmlNode xn in xmlNodeList)//遍历所有子节点
            {
                XmlElement xe = (XmlElement)xn;//将子节点类型转换为aXmlElement类型
                if (xe.GetAttribute("id") == id)
                {
                    xe.ParentNode.RemoveChild(xe);
                }
            }
            objXmlDoc.Save(XmlFile);
        }
        #endregion

        #region 修改xml
        public void edidXml(Node node)
        {
            XmlNodeList xmlNodeList = objXmlDoc.SelectSingleNode("dataTable").ChildNodes;//获取dbGuest节点的所有子节点
            foreach (XmlNode xn in xmlNodeList)//遍历所有子节点
            {
                XmlElement xe = (XmlElement)xn;//将子节点类型转换为aXmlElement类型
                if (xe.GetAttribute("id") == node.id)
                {
                    xe.GetElementsByTagName("title")[0].InnerText = node.title;
                    xe.GetElementsByTagName("type")[0].InnerText = node.type;
                    xe.GetElementsByTagName("editTime")[0].InnerText = node.editTime;
                    xe.GetElementsByTagName("content")[0].InnerText = node.content;
                }
            }
            objXmlDoc.Save(XmlFile);
        }
        #endregion

        public string getID()
        {
            return DateTime.Now.ToString("yyyyMMddHHmmssfffffff");
        }

        public string getDateString()
        {
            return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
        }
    }