html 解析代码_sql 解析html-优快云博客

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注意添加引用，

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 Winista.Text.HtmlParser;
using Winista.Text.HtmlParser.Lex;
using Winista.Text.HtmlParser.Util;
using Winista.Text.HtmlParser.Tags;
using Winista.Text.HtmlParser.Filters;

namespace HTMLParser
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
AddUrl();
}

private void btnParser_Click(object sender, EventArgs e)
{
#region 获得网页的html
try
{

txtHtmlWhole.Text = "";
string url = CBUrl.SelectedItem.ToString().Trim();
System.Net.WebClient aWebClient = new System.Net.WebClient();
aWebClient.Encoding = System.Text.Encoding.Default;
string html = aWebClient.DownloadString(url);
txtHtmlWhole.Text = html;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
#endregion

#region 分析网页html节点
Lexer lexer = new Lexer(this.txtHtmlWhole.Text);
Parser parser = new Parser(lexer);
NodeList htmlNodes = parser.Parse(null);
this.treeView1.Nodes.Clear();
this.treeView1.Nodes.Add("root");
TreeNode treeRoot = this.treeView1.Nodes[0];
for (int i = 0; i < htmlNodes.Count; i++)
{
this.RecursionHtmlNode(treeRoot, htmlNodes[i], false);
}

#endregion

}

private void RecursionHtmlNode(TreeNode treeNode, INode htmlNode, bool siblingRequired)
{
if (htmlNode == null || treeNode == null) return;

TreeNode current = treeNode;
TreeNode content ;
//current node
if (htmlNode is ITag)
{
ITag tag = (htmlNode as ITag);
if (!tag.IsEndTag())
{
string nodeString = tag.TagName;
if (tag.Attributes != null && tag.Attributes.Count > 0)
{
if (tag.Attributes["ID"] != null)
{
nodeString = nodeString + " { id=\"" + tag.Attributes["ID"].ToString() + "\" }";
}
if (tag.Attributes["HREF"] != null)
{
nodeString = nodeString + " { href=\"" + tag.Attributes["HREF"].ToString() + "\" }";
}
}

current = new TreeNode(nodeString);
treeNode.Nodes.Add(current);
}
}

//获取节点间的内容
if (htmlNode.Children != null && htmlNode.Children.Count > 0)
{
this.RecursionHtmlNode(current, htmlNode.FirstChild, true);
content = new TreeNode(htmlNode.FirstChild.GetText());
treeNode.Nodes.Add(content);
}

//the sibling nodes
if (siblingRequired)
{
INode sibling = htmlNode.NextSibling;
while (sibling != null)
{
this.RecursionHtmlNode(treeNode, sibling, false);
sibling = sibling.NextSibling;
}
}
}
private void AddUrl()
{
CBUrl.Items.Add("http://www.hao123.com");
CBUrl.Items.Add("http://www.sina.com");
CBUrl.Items.Add("http://www.heuet.edu.cn");
}