内容页超连接关键词的完美实现

 转自：http://blog.csdn.net/yyixin/archive/2009/07/26/4380877.aspx

<% @ Page Language = " C# " AutoEventWireup = " true " CodeFile = " ArticleAdd.aspx.cs " Inherits = " ArticleAdd " validateRequest = " false " %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

< html xmlns ="http://www.w3.org/1999/xhtml" >
< head runat ="server" >
    < title > 无标题页 </ title >
</ head >
< body >
    < form id ="form1" runat ="server" >
    < div >
        关 键 词：
        < br />< asp:TextBox ID ="TextBox2" runat ="server" Rows ="5" width ="400" TextMode ="MultiLine" Text ="春江|海平|明月" ></ asp:TextBox >
        < br />
        相应连接：
        < br />< asp:TextBox ID ="TextBox3" runat ="server" Rows ="5" width ="400" TextMode ="MultiLine" Text ="http://www.jtwq.com/a.aspx|http://www.jtwq.com/b.aspx|http://www.jtwq.com/c.aspx" ></ asp:TextBox >
        < br />
        内容输入：
        < br />< asp:TextBox ID ="TextBox1" runat ="server"   Rows ="5" width ="400" TextMode ="MultiLine" Text ="春江潮水连海平，海上明月共潮声。滟滟随波千万里，何处春江无月明。" ></ asp:TextBox >
        < br />
        < asp:Button ID ="Button1" runat ="server" Text ="Button" OnClick ="Button1_Click" />
    </ div >
    </ form >
</ body >
</ html >

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;

public partial class ArticleAdd : System.Web.UI.Page
{
    protected void Page_Load( object sender, EventArgs e) { } protected void Button1_Click( object sender, EventArgs e)
    {
        string v = TextBox1.Text;

        Response.Write(StrInArray(v));

    }

    private string StrInArray( string v)
    {
       
        // 关键词与URL可以从数据库中读取，这里直接赋值
        string vKey = " 春江|海平|明月 " ; // 关键词
        string vHref = " http://www.jtwq.com/a.aspx|http://www.jtwq.com/b.aspx|http://www.jtwq.com/c.aspx " ; // 相应的链接
        string [] arr1 = vKey.Split( new char [ 1 ] { ' | ' });
        string [] arr2 = vHref.Split( new char [ 1 ] { ' | ' });

        string Reg = @" <(a|pre)\b(?:(?!</?\1).)*</\1> " ; // 此正则参考了“lxcnn”的写法
        MatchCollection mc = Regex.Matches(v, Reg, RegexOptions.IgnoreCase);
        string [] MatchVale = new string [mc.Count];
        int i = 0 ;
        foreach (Match m in mc)
        {
            MatchVale[i ++ ] = m.Groups[ 0 ].Value.ToLower().Trim();
            v = v.Replace(m.Groups[ 0 ].Value.ToLower().Trim(), " tmpStr " + (i - 1 ));
        }

        for ( int ii = 0 ; ii < arr1.Length; ii ++ )
        {
           v = v.Replace(arr1[ii], " <a href=\" " + arr2[ii] + " \"> " + arr1[ii] + " </a> " );
        }

        for ( int iii = 0 ; iii < MatchVale.Length; iii ++ )
        {
            v = v.Replace( " tmpStr " + iii, MatchVale[iii]);
        }

        return v;
    }
   
}