C#TreeView讀取Xml，TreeView導出到Xml

實現功能有
1.根據Xml生成TreeView
2.雙擊修改節點
3.右鍵添加子節點或添加要節點
4.右鍵刪除當前選擇的節點
5.將修改后的TreeView重新生成Xml文檔

其實這個主要是實現 了Xml生成TreeView，然后再根據TreeView生成Xml的過程
對我們操作這方面實現有很大的幫助
下面一起來看看我的界面吧

 
下面咱們一步一步來實現一下吧，
先來看看我的Xml文檔結構

<?xml version="1.0" encoding="UTF-8"?>
<Tree>
  <Node Name="1" Text="去查網" >
    <Node Name="2" Text="技術部" ></Node>
    <Node Name="" Text="新建子節點" ></Node>
  </Node>
  <Node Name="3" Text="cckan" >
    <Node Name="4" Text="開發部" ></Node>
  </Node>
  <Node Name="5" Text="51.la" >
    <Node Name="7" Text="銷售部fdf" >
      <Node Name="" Text="新建子節點" ></Node>
      <Node Name="" Text="新建子節點" >
        <Node Name="" Text="新建子節點" ></Node>
        <Node Name="" Text="新建子節點fdf" ></Node>
        <Node Name="" Text="新建子節點fdfd" ></Node>
      </Node>
    </Node>
    <Node Name="8" Text="操作部fdf" >
      <Node Name="" Text="新建子節點" ></Node>
    </Node>
    <Node Name="9" Text="客服部fdf" ></Node>
    <Node Name="10" Text="財務部" ></Node>
  </Node>
  <Node Name="" Text="新建根節點" >
    <Node Name="" Text="新建子節點" ></Node>
    <Node Name="" Text="新建子節點" ></Node>
    <Node Name="" Text="新建子節點" ></Node>
    <Node Name="" Text="新建子節點" ></Node>
  </Node>
  <Node Name="" Text="新建根節點" >
    <Node Name="" Text="新建子節點" ></Node>
  </Node>
  <Node Name="" Text="新建根節點" ></Node>
</Tree>

很簡單吧，
下面來看看是怎么生成TreeView的

XmlDocument doc = new XmlDocument();
       StringBuilder sb = new StringBuilder();
       //XML每行的內容
       private string xmlLine = "";
       //加載
       private void Form1_Load(object sender, EventArgs e)
       {
           doc.Load("TreeXml.xml"); //我是把xml放到debug里面了.你的路徑就隨便啦.不過這樣方便一些.
           RecursionTreeControl(doc.DocumentElement, treeView1.Nodes);//將加載完成的XML文件顯示在TreeView控件中
           treeView1.ExpandAll();//展開TreeView控件中的所有項
       }
       /// <summary>
       /// RecursionTreeControl:表示將XML文件的內容顯示在TreeView控件中
       /// </summary>
       /// <param name="xmlNode">將要加載的XML文件中的節點元素</param>
       /// <param name="nodes">將要加載的XML文件中的節點集合</param>
       private void RecursionTreeControl(XmlNode xmlNode, TreeNodeCollection nodes)
       {
           foreach (XmlNode node in xmlNode.ChildNodes)//循環遍歷當前元素的子元素集合
           {
               TreeNode new_child = new TreeNode();//定義一個TreeNode節點對象
               new_child.Name = node.Attributes["Name"].Value;
               new_child.Text = node.Attributes["Text"].Value;
               nodes.Add(new_child);//向當前TreeNodeCollection集合中添加當前節點
               RecursionTreeControl(node, new_child.Nodes);//調用本方法進行遞歸
           }
       }

用的是一個遞歸的方式生成的，
大家看看就明白了
下面是刪除，修改和添加節點的代碼

//雙擊時修改
        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)//判斷你點的是不是一個節點
                {
                    treeView1.SelectedNode = CurrentNode;//選中這個節點
                    treeView1.LabelEdit = true;
                    treeView1.SelectedNode.BeginEdit();
                }
            }
        }
//添加節點
        private void addTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Nodes.Add("新建子節點");
                toolStripStatusLabel1.Text = "新建子節點";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //刪除節點
        private void deleteTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Remove();
            }
            catch (Exception ex)
            {
 
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //新建根節點
        private void addRootTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.Nodes.Add("新建根節點");
                toolStripStatusLabel1.Text = "新建根節點成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }

下面就是把修改和刪除之后的TreeView重新保存成Xml文檔了
一起來看看代碼吧

//保存
        private void SaveXml_Click(object sender, EventArgs e)
        {
            try
            {
 
                //寫文件頭部內容
                //下面是生成RSS的OPML文件
                sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
                sb.Append("<Tree>");
 
                //遍歷根節點
                foreach (TreeNode node in treeView1.Nodes)
                {
                    xmlLine = GetRSSText(node);
                    sb.Append(xmlLine);
 
                    //遞歸遍歷節點
                    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;
            }
        }
//遞歸遍歷節點內容,最關鍵的函數
        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);
                //如果還有子節點則繼續遍歷
                if (ctn.Nodes.Count > 0)
                {
                    parseNode(ctn, sb);
                }
                sb.Append("</Node>");
            }
        }
        //成生RSS節點的XML文本行
        private string GetRSSText(TreeNode node)
        {
            //根據Node屬性生成XML文本
            string rssText = "<Node Name=\"" + node.Name + "\" Text=\"" + node.Text + "\" >";
 
            return rssText;
        }

好了全部代碼貼一下大家看看吧

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每行的內容
        private string xmlLine = "";
        //加載
        private void Form1_Load(object sender, EventArgs e)
        {
            doc.Load("TreeXml.xml"); //我是把xml放到debug里面了.你的路徑就隨便啦.不過這樣方便一些.
            RecursionTreeControl(doc.DocumentElement, treeView1.Nodes);//將加載完成的XML文件顯示在TreeView控件中
            treeView1.ExpandAll();//展開TreeView控件中的所有項
        }
        /// <summary>
        /// RecursionTreeControl:表示將XML文件的內容顯示在TreeView控件中
        /// </summary>
        /// <param name="xmlNode">將要加載的XML文件中的節點元素</param>
        /// <param name="nodes">將要加載的XML文件中的節點集合</param>
        private void RecursionTreeControl(XmlNode xmlNode, TreeNodeCollection nodes)
        {
            foreach (XmlNode node in xmlNode.ChildNodes)//循環遍歷當前元素的子元素集合
            {
                TreeNode new_child = new TreeNode();//定義一個TreeNode節點對象
                new_child.Name = node.Attributes["Name"].Value;
                new_child.Text = node.Attributes["Text"].Value;
                nodes.Add(new_child);//向當前TreeNodeCollection集合中添加當前節點
                RecursionTreeControl(node, new_child.Nodes);//調用本方法進行遞歸
            }
        }
        //雙擊時修改
        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)//判斷你點的是不是一個節點
                {
                    treeView1.SelectedNode = CurrentNode;//選中這個節點
                    treeView1.LabelEdit = true;
                    treeView1.SelectedNode.BeginEdit();
                }
            }
        }
 
        //遞歸遍歷節點內容,最關鍵的函數
        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);
                //如果還有子節點則繼續遍歷
                if (ctn.Nodes.Count > 0)
                {
                    parseNode(ctn, sb);
                }
                sb.Append("</Node>");
            }
 
 
        }
        //成生RSS節點的XML文本行
        private string GetRSSText(TreeNode node)
        {
            //根據Node屬性生成XML文本
            string rssText = "<Node Name=\"" + node.Name + "\" Text=\"" + node.Text + "\" >";
 
            return rssText;
        }
 
        //添加節點
        private void addTreeNode_Click(object sender, EventArgs e)
        {
            try
            {
                treeView1.SelectedNode.Nodes.Add("新建子節點");
                toolStripStatusLabel1.Text = "新建子節點";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //刪除節點
        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("新建根節點");
                toolStripStatusLabel1.Text = "新建根節點成功";
            }
            catch (Exception ex)
            {
                toolStripStatusLabel1.Text = ex.Message;
            }
        }
        //保存
        private void SaveXml_Click(object sender, EventArgs e)
        {
            try
            {
 
                //寫文件頭部內容
                //下面是生成RSS的OPML文件
                sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
                sb.Append("<Tree>");
 
                //遍歷根節點
                foreach (TreeNode node in treeView1.Nodes)
                {
                    xmlLine = GetRSSText(node);
                    sb.Append(xmlLine);
 
                    //遞歸遍歷節點
                    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;
            }
        }
    }
}

對於生成樹的部分其實還有一種Linq的實現方式如下

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)
                );
        }