求一个正则表达式

Question

如题<div class="MIB_feed_c">
.......
</div>
这中间有无数html标记，包括div标签。我怎么样获取这中间的数据，包括这两个标签。另，网页中这样的标签不只出现一次。能一次都获取吗？

Answer 1

Regex reg = new Regex(@"(?is)<div[^>]*?class=""MIB_feed_c""[^>]*>(.*?)</div>");
MatchCollection mc = reg.Matches(str);
foreach (Match m in mc)
{
    TextBox1.Text += m.Groups[1].Value + "\n";
}

Answer 2

请问入门 str 是什么啊？

Answer 3

str就是获取你网页的源代码。 /// <summary>
        /// 根据 url 获取网页编码
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetEncoding(string url)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            StreamReader reader = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = 20000;
                request.AllowAutoRedirect = false;                response = (HttpWebResponse)request.GetResponse();
                if (response.StatusCode == HttpStatusCode.OK && response.ContentLength < 1024 * 1024)
                {
                    if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                        reader = new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
                    else
                        reader = new StreamReader(response.GetResponseStream(), Encoding.ASCII);                    string html = reader.ReadToEnd();                    Regex reg_charset = new Regex(@"charset\b\s*=\s*(?<charset>[^""]*)");
                    if (reg_charset.IsMatch(html))
                    {
                        return reg_charset.Match(html).Groups["charset"].Value;
                    }
                    else if (response.CharacterSet != string.Empty)
                    {
                        return response.CharacterSet;
                    }
                    else
                        return Encoding.Default.BodyName;
                }
            }
            catch
            {
            }
            finally
            {                if (response != null)
                {
                    response.Close();
                    response = null;
                }
                if (reader != null)
                    reader.Close();                if (request != null)
                    request = null;            }            return Encoding.Default.BodyName;
        }用这段代码 运行一下 抓取你的HTML信息然后赋给String str=..然后在用如梦的方法。

Answer 4

求助如梦：比如
<div class="MIB_feed_c">
<div>test</div>
</div>
匹配出来的结果是<div>test我想得到的结果是
<div>test</div>
谢谢！

Answer 5

[code C#]
            string str = "<div class=\"MIB_feed_c\">test1test1<div>test1</div>test1test1</div>" 
                        +"aaaa<ul><li>aaaa</li></ul>"
                        + "<div class=\"MIB_feed_c\"><div>test2</div></div>"
                        + "bbbb"
                        + "<div class=\"MIB_feed_c\"><div>test3</div></div>";
            Regex reg = new Regex(@"(?is)<div[^>]*?class=(['""\s]?)MIB_feed_c\1[^>]*?>.*?(<div[^>]*?>.*?</div>)*.*?</div>");
            MatchCollection match = reg.Matches(str);
            foreach (Match m in match)
            {
                Response.Write(m.Value + "<br/>");
            }
[/code]

Answer 6

楼主说了是有嵌套的，如果用正则处理，除非是嵌套层次固定，否则不用平衡组基本上就是在开玩笑            string test = @"<div class=""MIB_feed_c"">
<div>test</div>
</div>";
            Regex reg = new Regex(@"(?is)<div\s+class=""MIB_feed_c"">((?><div(?<o>)|</div>(?<-o>)|(?:(?!</?div).)*)*)(?(o)(?!))</div>");
            MatchCollection mc = reg.Matches(test);
            foreach (Match m in mc)
            {
                richTextBox2.Text += m.Groups[1].Value + "\n================\n";
            }

Answer 7

强悍的过客兄，学习了，平衡组以前还真没用过
网上查了资料
            string str = "<div class=\"MIB_feed_c\">test1<ul><li>ulli</li></ul>test1<div>tes<ul><li title='ul li'>ul li</li></ul>t1</div>test1test1</div>" 
                        +"aaaa<ul><li>aaaa</li></ul>"
                        + "<div class=\"MIB_feed_c\"><div>test2</div></div>"
                        + "bbbb"
                        + "<div class=\"MIB_feed_c\"><div>test3</div></div>";
            //Regex reg = new Regex(@"(?is)<div[^>]*?class=(['""\s]?)MIB_feed_c\1[^>]*?>.*?(<div[^>]*?>.*?</div>)*.*?</div>");
            Regex reg = new Regex(@"(?is)<div[^>]*?class=(['""\s]?)MIB_feed_c\1[^>]*?>.*?(((?'Open'<div[^>]*>)[^<>]*)+((?'-Open'</div>)[^<>]*)+)*(?(Open)(?!))</div>");
            MatchCollection match = reg.Matches(str);
            foreach (Match m in match)
            {
                Response.Write(m.Value + "<br/>");
            }

Answer 8

//咦，我的UBB出来了
            string str = "<div class=\"MIB_feed_c\">test1<ul><li>ulli</li></ul>test1<div>tes<ul><li title='ul li'>ul li</li></ul>t1</div>test1test1</div>" 
                        +"aaaa<ul><li>aaaa</li></ul>"
                        + "<div class=\"MIB_feed_c\"><div>test2</div></div>"
                        + "bbbb"
                        + "<div class=\"MIB_feed_c\"><div>test3</div></div>";
            Regex reg = new Regex(@"(?is)<div[^>]*?class=(['""\s]?)MIB_feed_c\1[^>]*?>.*?(((?'Open'<div[^>]*>)[^<>]*)+((?'-Open'</div>)[^<>]*)+)*(?(Open)(?!))</div>");
            MatchCollection match = reg.Matches(str);
            foreach (Match m in match)
            {
                Response.Write(m.Value + "<br/>");
            }