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)
);
}