C#TreeView读取Xml，TreeView导出到Xml

实现功能有
1.根据Xml生成TreeView
2.双击修改节点
3.右键添加子节点或添加要节点
4.右键删除当前选择的节点
5.将修改后的TreeView重新生成Xml文档

其实这个主要是实现 了Xml生成TreeView，然后再根据TreeView生成Xml的过程
对我们操作这方面实现有很大的帮助
下面一起来看看我的界面吧

 
下面咱们一步一步来实现一下吧，
先来看看我的Xml文档结构

<?xml version="1.0" encoding="UTF-8"?>
<Tree>
  <Node Name="" Text="去查网" >
    <Node Name="" Text="技术部" ></Node>
    <Node Name="" Text="新建子节点" ></Node>
  </Node>
  <Node Name="" Text="cckan" >
    <Node Name="" Text="开发部" ></Node>
  </Node>
  <Node Name="" Text="51.la" >
    <Node Name="" Text="销售部fdf" >
      <Node Name="" Text="新建子节点" ></Node>
      <Node Name="" Text="新建子节点" >
        <Node Name="" Text="新建子节点" ></Node>
        <Node Name="" Text="新建子节点fdf" ></Node>
        <Node Name="" Text="新建子节点fdfd" ></Node>
      </Node>
    </Node>
    <Node Name="" Text="操作部fdf" >
      <Node Name="" Text="新建子节点" ></Node>
    </Node>
    <Node Name="" Text="客服部fdf" ></Node>
    <Node Name="" Text="财务部" ></Node>
  </Node>
  <Node Name="" Text="新建根节点" >
    <Node Name="" Text="新建子节点" ></Node>
    <Node Name="" Text="新建子节点" ></Node>
    <Node Name="" Text="新建子节点" ></Node>
    <Node Name="" Text="新建子节点" ></Node>
  </Node>
  <Node Name="" Text="新建根节点" >
    <Node Name="" Text="新建子节点" ></Node>
  </Node>
  <Node Name="" Text="新建根节点" ></Node>
</Tree>

很简单吧，
下面来看看是怎么生成TreeView的

XmlDocument doc = new XmlDocument();
       StringBuilder sb = new StringBuilder();
       //XML每行的内容
       private string xmlLine = "";
       //加载
       private void Form1_Load(object sender, EventArgs e)
       {
           doc.Load("TreeXml.xml"); //我是把xml放到debug里面了.你的路径就随便啦.不过这样方便一些.
           RecursionTreeControl(doc.DocumentElement, treeView1.Nodes);//将加载完成的XML文件显示在TreeView控件中
           treeView1.ExpandAll();//展开TreeView控件中的所有项
       }
       /// <summary>
       /// RecursionTreeControl:表示将XML文件的内容显示在TreeView控件中
       /// </summary>
       /// <param name="xmlNode">将要加载的XML文件中的节点元素</param>
       /// <param name="nodes">将要加载的XML文件中的节点集合</param>
       private void RecursionTreeControl(XmlNode xmlNode, TreeNodeCollection nodes)
       {
           foreach (XmlNode node in xmlNode.ChildNodes)//循环遍历当前元素的子元素集合
           {
               TreeNode new_child = new TreeNode();//定义一个TreeNode节点对象
               new_child.Name = node.Attributes["Name"].Value;
               new_child.Text = node.Attributes["Text"].Value;
               nodes.Add(new_child);//向当前TreeNodeCollection集合中添加当前节点
               RecursionTreeControl(node, new_child.Nodes);//调用本方法进行递归
           }
       }

用的是一个递归的方式生成的，
大家看看就明白了
下面是删除，修改和添加节点的代码

//双击时修改
        private void treeView1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                Point ClickPoint = new Point(e.X, e.Y);
                TreeNode CurrentNode = treeView1.GetNodeAt(ClickPoint);
                if (CurrentNode != null)//判断你点的是不是一个节点
                {
                    treeView1.SelectedNode = CurrentNode;//选中这个节点
                    treeView1.LabelEdit = true;
                    treeView1.SelectedNode.BeginEdit();
                }
            }
        }
//添加节点
        private void addTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Nodes.Add("新建子节点");
                toolStripStatusLabel1.Text = "新建子节点";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //删除节点
        private void deleteTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Remove();
            }
            catch (Exception ex)
            {

                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //新建根节点
        private void addRootTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.Nodes.Add("新建根节点");
                toolStripStatusLabel1.Text = "新建根节点成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }

下面就是把修改和删除之后的TreeView重新保存成Xml文档了
一起来看看代码吧

//保存
        private void SaveXml_Click(object sender, EventArgs e)
        {
            try
            {

                //写文件头部内容
                //下面是生成RSS的OPML文件
                sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
                sb.Append("<Tree>");

                //遍历根节点
                foreach (TreeNode node in treeView1.Nodes)
                {
                    xmlLine = GetRSSText(node);
                    sb.Append(xmlLine);

                    //递归遍历节点
                    parseNode(node, sb);

                    sb.Append("</Node>");
                }
                sb.Append("</Tree>");

                StreamWriter sr = new StreamWriter("TreeXml.xml", false, System.Text.Encoding.UTF8);
                sr.Write(sb.ToString());
                sr.Close();
                toolStripStatusLabel1.Text = "保存成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
//递归遍历节点内容,最关键的函数
        private void parseNode(TreeNode tn, StringBuilder sb)
        {
            IEnumerator ie = tn.Nodes.GetEnumerator();

            while (ie.MoveNext())
            {
                TreeNode ctn = (TreeNode)ie.Current;
                xmlLine = GetRSSText(ctn);
                sb.Append(xmlLine);
                //如果还有子节点则继续遍历
                if (ctn.Nodes.Count > )
                {
                    parseNode(ctn, sb);
                }
                sb.Append("</Node>");
            }
        }
        //成生RSS节点的XML文本行
        private string GetRSSText(TreeNode node)
        {
            //根据Node属性生成XML文本
            string rssText = "<Node Name=\"" + node.Name + "\" Text=\"" + node.Text + "\" >";

            return rssText;
        }

好了全部代码贴一下大家看看吧

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.Collections;
using System.IO;

namespace TreeLoadXml
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        XmlDocument doc = new XmlDocument();
        StringBuilder sb = new StringBuilder();
        //XML每行的内容
        private string xmlLine = "";
        //加载
        private void Form1_Load(object sender, EventArgs e)
        {
            doc.Load("TreeXml.xml"); //我是把xml放到debug里面了.你的路径就随便啦.不过这样方便一些.
            RecursionTreeControl(doc.DocumentElement, treeView1.Nodes);//将加载完成的XML文件显示在TreeView控件中
            treeView1.ExpandAll();//展开TreeView控件中的所有项
        }
        /// <summary>
        /// RecursionTreeControl:表示将XML文件的内容显示在TreeView控件中
        /// </summary>
        /// <param name="xmlNode">将要加载的XML文件中的节点元素</param>
        /// <param name="nodes">将要加载的XML文件中的节点集合</param>
        private void RecursionTreeControl(XmlNode xmlNode, TreeNodeCollection nodes)
        {
            foreach (XmlNode node in xmlNode.ChildNodes)//循环遍历当前元素的子元素集合
            {
                TreeNode new_child = new TreeNode();//定义一个TreeNode节点对象
                new_child.Name = node.Attributes["Name"].Value;
                new_child.Text = node.Attributes["Text"].Value;
                nodes.Add(new_child);//向当前TreeNodeCollection集合中添加当前节点
                RecursionTreeControl(node, new_child.Nodes);//调用本方法进行递归
            }
        }
        //双击时修改
        private void treeView1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                Point ClickPoint = new Point(e.X, e.Y);
                TreeNode CurrentNode = treeView1.GetNodeAt(ClickPoint);
                if (CurrentNode != null)//判断你点的是不是一个节点
                {
                    treeView1.SelectedNode = CurrentNode;//选中这个节点
                    treeView1.LabelEdit = true;
                    treeView1.SelectedNode.BeginEdit();
                }
            }
        }

        //递归遍历节点内容,最关键的函数
        private void parseNode(TreeNode tn, StringBuilder sb)
        {
            IEnumerator ie = tn.Nodes.GetEnumerator();

            while (ie.MoveNext())
            {
                TreeNode ctn = (TreeNode)ie.Current;
                xmlLine = GetRSSText(ctn);
                sb.Append(xmlLine);
                //如果还有子节点则继续遍历
                if (ctn.Nodes.Count > )
                {
                    parseNode(ctn, sb);
                }
                sb.Append("</Node>");
            }

        }
        //成生RSS节点的XML文本行
        private string GetRSSText(TreeNode node)
        {
            //根据Node属性生成XML文本
            string rssText = "<Node Name=\"" + node.Name + "\" Text=\"" + node.Text + "\" >";

            return rssText;
        }

        //添加节点
        private void addTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Nodes.Add("新建子节点");
                toolStripStatusLabel1.Text = "新建子节点";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //删除节点
        private void deleteTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Remove();
            }
            catch (Exception ex)
            {

                toolStripStatusLabel1.Text = ex.Message;
            }
        }

        private void addRootTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.Nodes.Add("新建根节点");
                toolStripStatusLabel1.Text = "新建根节点成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //保存
        private void SaveXml_Click(object sender, EventArgs e)
        {
            try
            {

                //写文件头部内容
                //下面是生成RSS的OPML文件
                sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
                sb.Append("<Tree>");

                //遍历根节点
                foreach (TreeNode node in treeView1.Nodes)
                {
                    xmlLine = GetRSSText(node);
                    sb.Append(xmlLine);

                    //递归遍历节点
                    parseNode(node, sb);

                    sb.Append("</Node>");
                }
                sb.Append("</Tree>");

                StreamWriter sr = new StreamWriter("TreeXml.xml", false, System.Text.Encoding.UTF8);
                sr.Write(sb.ToString());
                sr.Close();
                toolStripStatusLabel1.Text = "保存成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
    }
}

对于生成树的部分其实还有一种Linq的实现方式如下

private void SaveToXml()
        {
            XDeclaration dec = new XDeclaration("1.0", "utf-8", "yes");
            XDocument xml = new XDocument(dec);

            XElement root = new XElement("Tree");

            foreach (TreeNode node in treeView1.Nodes)
            {
                XElement e = CreateElements(node);
                root.Add(e);
            }
            xml.Add(root);
            xml.Save("TreeXml.xml");
        }

        private XElement CreateElements(TreeNode node)
        {
            XElement root = CreateElement(node);

            foreach (TreeNode n in node.Nodes)
            {
                XElement e = CreateElements(n);
                root.Add(e);
            }
            return root;
        }

        private XElement CreateElement(TreeNode node)
        {
            return new XElement("Node",
                new XAttribute("Name", node.Name),
                new XAttribute("Text", node.Text)
                );
        }