C#TreeView读取Xml，TreeView导出到Xml

来源：互联网发布：电驴默认端口编辑：程序博客网时间：2024/05/16 12:50

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
源码下载 TreeLoadXml.rar (24.14 KB, 下载次数: 627) 只有注册会员可以下载
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

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 > 0)

{

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)

);

}

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