C#中xml写入treeview，treeview写入xml

using System;   
using System.Collections.Generic;   
using System.Text;   
using System.Windows.Forms;   
using System.Xml;   
  
  
namespace treeview2   //你的项目名
{   
    class TreeExXMLCls   
    {   
        private TreeView thetreeview;   
        private string xmlfilepath;   
        XmlTextWriter textWriter;   
        XmlNode Xmlroot;   
        XmlDocument textdoc;   
  
        public TreeExXMLCls()   
        {   
            //----构造函数   
            textdoc = new XmlDocument();   
  
        }   
  
        ~TreeExXMLCls()   
        {   
            //----析构函数   
        }  
 
        #region 遍历treeview并实现向XML的转化   
        /// <summary>      
        /// 遍历treeview并实现向XML的转化   
        /// </summary>      
        /// <param name="TheTreeView">树控件对象</param>      
        /// <param name="XMLFilePath">XML输出路径</param>      
        /// <returns>0表示函数顺利执行</returns>      
  
        public int TreeToXML(TreeView TheTreeView, string XMLFilePath)   
        {   
            //-------初始化转换环境变量   
            thetreeview = TheTreeView;   
            xmlfilepath = XMLFilePath;   
            textWriter = new XmlTextWriter(xmlfilepath, null);   
  
            //-------创建XML写操作对象   
            textWriter.Formatting = Formatting.Indented;   
  
            //-------开始写过程，调用WriteStartDocument方法   
            textWriter.WriteStartDocument();   
  
            //-------写入说明   
            textWriter.WriteComment("this XML is created from a tree");   
            
            //-------添加第一个根节点   
            textWriter.WriteStartElement("TreeExXMLCls");   
            textWriter.WriteEndElement();   
  
            //------ 写文档结束，调用WriteEndDocument方法   
            textWriter.WriteEndDocument();   
  
            //-----关闭输入流   
            textWriter.Close();   
  
            //-------创建XMLDocument对象   
            textdoc.Load(xmlfilepath);   
  
            //------选中根节点   
            XmlElement Xmlnode=textdoc.CreateElement(thetreeview.Nodes[0].Text);   
            Xmlroot = textdoc.SelectSingleNode("TreeExXMLCls");   
  
            //------遍历原treeview控件，并生成相应的XML   
            TransTreeSav(thetreeview.Nodes, (XmlElement)Xmlroot);   
            return 0;   
        }   
  
        private int TransTreeSav(TreeNodeCollection nodes, XmlElement ParXmlnode)    
        {   
  
            //-------遍历树的各个故障节点，同时添加节点至XML   
            XmlElement xmlnode;   
            Xmlroot = textdoc.SelectSingleNode("TreeExXMLCls");   
  
            foreach (TreeNode node in nodes)   
            {   
                xmlnode = textdoc.CreateElement(node.Text);   
                ParXmlnode.AppendChild(xmlnode);   
  
                if (node.Nodes.Count > 0)   
                {   
                    TransTreeSav(node.Nodes, xmlnode);   
                }   
            }   
            textdoc.Save(xmlfilepath);   
            return 0;   
        }  
 
        #endregion  
 
        #region 遍历XML并实现向tree的转化   
        /// <summary>      
        /// 遍历treeview并实现向XML的转化   
        /// </summary>      
        /// <param name="XMLFilePath">XML输出路径</param>      
        /// <param name="TheTreeView">树控件对象</param>      
        /// <returns>0表示函数顺利执行</returns>      
  
        public int XMLToTree(string XMLFilePath,TreeView TheTreeView)   
        {   
            //-------重新初始化转换环境变量   
            thetreeview = TheTreeView;
            xmlfilepath = XMLFilePath;   
  
            //-------重新对XMLDocument对象赋值   
            textdoc.Load(xmlfilepath);

            XmlNode root = textdoc.SelectSingleNode("Authors_Table");//读的xml的节点名
              
            foreach (XmlNode subXmlnod in root.ChildNodes)   
            {   
                TreeNode trerotnod = new TreeNode();   
                trerotnod.Text = subXmlnod.Name;   
                thetreeview.Nodes.Add(trerotnod);   
                TransXML(subXmlnod.ChildNodes, trerotnod);   
    
            }   
            return 0;   
        }   
  
        private int TransXML(XmlNodeList Xmlnodes,TreeNode partrenod)   
        {   
            //------遍历XML中的所有节点，仿照treeview节点遍历函数   
            foreach (XmlNode xmlnod in Xmlnodes)   
            {   
                TreeNode subtrnod = new TreeNode();   
                subtrnod.Text = xmlnod.Name+xmlnod.value;   
                partrenod.Nodes.Add(subtrnod);   
  
                if (xmlnod.ChildNodes.Count > 0)   
                {   
                    TransXML(xmlnod.ChildNodes, subtrnod);   
                }   
            }   
            return 0;   
        }  
        #endregion   
    }   
} 

上面是新建了个类。写完后要调用类方法

 private void button1_Click(object sender, EventArgs e)
        {
            TreeExXMLCls a = new TreeExXMLCls();
            a.XMLToTree("D:\\实验室\\匡老师项目\\wxample2.xml",treeView1);
        }

按钮单击事件激活方法。就可以把节点显示到treeview里了。