IE高亮网页中的关键字

园子里有人写过在WebBrowser 控件里高亮关键字的方法。在此基础上我简单修改实现了直接在IE中高亮关键字。

下面是简单实例，高亮新浪首页的“奥运”关键字 

注意引用 mshtml和SHDocVw

 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Text;
 7 using System.Windows.Forms;
 8 using System.IO;
 9 using mshtml;
 using SHDocVw;
 
 namespace WebIntlTest
 {
     public partial class Form1 : Form
     {   
         private SHDocVw.InternetExplorer IE;
         private DWebBrowserEvents2_DocumentCompleteEventHandler docCompleteHandler;
 
         public Form1()
         {
             InitializeComponent();
         }
 
         private void Button1_Click(object sender, EventArgs e)
         {
            
             IE = new InternetExplorer(); 
             IE.Visible = true;
             string URL = "http://www.sina.com.cn"; 
             object nullArg = null;
             IE.Navigate(URL, ref nullArg, ref nullArg, ref nullArg, ref nullArg);
             docCompleteHandler = new DWebBrowserEvents2_DocumentCompleteEventHandler(ie_DocumentComplete);
             IE.DocumentComplete += docCompleteHandler;
             
         }
 
         private void ie_DocumentComplete(object pDisp, ref object URL)
         {
 
            mshtml.IHTMLDocument2 htmlDoc = (mshtml.IHTMLDocument2)IE.Document;
            
             string tagBefore = "<span style='background-color:yellow;color:black'>";
             string tagAfter = "</span>";
 
             string keyword = "奥运";
             if (keyword == "")
                 return;
             IHTMLSelectionObject oTxtrange = htmlDoc.selection;
             IHTMLTxtRange txtrange = (IHTMLTxtRange)oTxtrange.createRange();
 
             while (txtrange.findText(keyword, 1, 4))
             {
                 try
                 {
                     txtrange.pasteHTML(tagBefore + keyword + tagAfter);
                 }
                 catch { }
                 txtrange.collapse(false);
             } 
         }
     }
 
 }