如何用正则表达式提取网页内容

[HTpaojiamen]

如何用正则表达式提取网页内容
代码如下：<div id="title" class="blog_tit_cont">
<strong>

<span >


<span>[转]</span>
为了练好口语，你敢不敢每天读一遍，坚持一个月？
</span>


</strong>
<span id="pubTime" class="c_tx3">
<script type="text/javascript">
var pubtime = g_oBlogData.data.pubtime;
var pubDate = new Date(pubtime * 1000);
document.write(pubDate.getFullYear() + "." + (pubDate.getMonth() + 1) + "." + pubDate.getDate());
</script>
</span>
<span id="readNum" class="c_tx3"> </span>
<span id="quoteInfo" class="c_tx3"> </span>
</div>




如何提取div下的strong的内容？求详细源码

[EnForGrass]

(?is)<strong>(?<strong>(.*))</strong>

[-过客-]

try...

            Regex reg = new Regex(@"(?is)<div[^>]*>(?:(?!</?div).)*(<strong[^>]*>.*?</strong>)");
            MatchCollection mc = reg.Matches(yourStr);
            foreach (Match m in mc)
            {
                richTextBox2.Text += m.Groups[1].Value + "\n";
            }

[porschev]

 static void Main(string[] args)
        {
            string str = @"<div id=""title"" class=""blog_tit_cont"">
<strong>

<span >


<span>[转]</span>	
为了练好口语，你敢不敢每天读一遍，坚持一个月？  
</span>


</strong>
<span id=""pubTime"" class=""c_tx3"">
<script type=""text/javascript"">
var pubtime = g_oBlogData.data.pubtime;
var pubDate = new Date(pubtime * 1000);
document.write(pubDate.getFullYear() + ""."" + (pubDate.getMonth() + 1) + ""."" + pubDate.getDate());
</script>
</span>
<span id=""readNum"" class=""c_tx3""> </span>
<span id=""quoteInfo"" class=""c_tx3""> </span>
</div>
";


            Regex re = new Regex(@"(?is)(?<=<div id=""title""[^>]+>\s*<strong>).*?(?=</strong>)", RegexOptions.None);       
            Console.WriteLine(re.Match(str).Value);  //re.Match(str).Value就是你要的
            Console.ReadLine();
        }

[EnForGrass]

C盘建一个1.txt

<div id="title" class="blog_tit_cont">
<strong>

<span >


<span>[转]</span>	
为了练好口语，你敢不敢每天读一遍，坚持一个月？  
</span>


</strong>
<span id="pubTime" class="c_tx3">
<script type="text/javascript">
var pubtime = g_oBlogData.data.pubtime;
var pubDate = new Date(pubtime * 1000);
document.write(pubDate.getFullYear() + "." + (pubDate.getMonth() + 1) + "." + pubDate.getDate());
</script>
</span>
<span id="readNum" class="c_tx3"> </span>
<span id="quoteInfo" class="c_tx3"> </span>
</div>

           string strfromtxt = File.ReadAllText(@"C:\1.txt", Encoding.GetEncoding("GB2312"));
            List<string> pro = new List<string>();
            MatchCollection matches1 = Regex.Matches(strfromtxt, @"(?is)<strong>(?<strong>(.*))</strong>", RegexOptions.IgnoreCase);
            foreach (Match match in matches1)
            {
                string contemp = match.Groups["strong"].Value;
                pro.Add(contemp);//结果数据
            }

[EnForGrass]

来个完整点的

C盘建一个1.txt
C# code

<div id="title" class="blog_tit_cont">
<strong>

<span >


<span>[转]</span>    
为了练好口语，你敢不敢每天读一遍，坚持一个月？  
</span>


</strong>
<span id="pubTime" class="c_tx3">
<script type="text/javascript">
var pubtime = g_oBlogData.data.pubtime;
var pubDate = new Date(pubtime * 1000);
document.write(pubDate.getFullYear() + "." + (pubDate.getMonth() + 1) + "." + pubDate.getDate());
</script>
</span>
<span id="readNum" class="c_tx3"> </span>
<span id="quoteInfo" class="c_tx3"> </span>
</div>

  string strfromtxt = File.ReadAllText(@"C:\1.txt", Encoding.GetEncoding("GB2312"));
            List<string> pro = new List<string>();
            MatchCollection matches1 = Regex.Matches(strfromtxt, @"(?is)<div\s*id=""title""\s*class=""blog_tit_cont"">\s*<strong>(?<strong>(.*))</strong>(.*?)</div>", RegexOptions.IgnoreCase);
            foreach (Match match in matches1)
            {
                string contemp = match.Groups["strong"].Value;
                pro.Add(contemp);
            }