C# 正则表达式 提取网页内容

.Net技术 码拜 8年前 (2015-05-10) 718次浏览 0个评论
 

html 源码:

</span>
      </div>

      <p class="orange f14 mt10">        浜ょ锛?/p>
                    <p class="bidc">
            http://www.jmbbs.com/forum.php?mod=viewthread&tid=3326260<br />
http://club.iweihai.cn/read-htm-tid-18259033.html
            </p>
              <div class="ntos clearfix" id="h_74674016">
        <span class="time" title="2015-04-28 17:07:22">2015-04-28</span>
        鍙備笌缂栧彿 #<a class="bidid" href="http://task.zhubajie.com/5554404/74674016.html">74674016</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class="nobrowse">闆囦富鏈祻瑙?/span>                <a href="javascript:;" act-type="workscomment" act-href="http://task.zhubajie.com/api/worksComment-wid-74674016.html" id="c_74674016">璇勮</a>
                                <a href="javascript:;" act-type="report" act-href="http://u.zhubajie.com/report/index" act-data="cata=1&wid=74674016" class="report">涓炬姤</a>
            &nbsp;&nbsp;&nbsp;
                        
                
        <div class="desc-mov">
                                                    </div>
              </div>
            <div id="wid_74674016"></div>
      
      
     
    </dd>
  </dl>
  <dl class="js-alert ">
    <dt><a target="_blank" href="http://shop.zhubajie.com/5593955/"><a class="user-card" act-data="uid=5593955&type=" href="http://shop.zhubajie.com/5593955/" target="_blank"><img id="avatar" src="http://avatar.zbjimg.com/005/59/39/200x200_avatar_55.jpg!small" class="touxiangall"  border="0" onerror="this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif""" alt="gillian2" /></a></a>
                            
                </dt>
    <dd>
        <div class="works-state "></div>
      <div class="usertitle">
            <a target="_blank" href="http://shop.zhubajie.com/5593955/">gillian2</a>
            
            <span class="titlelinks">
                      <a href="http://shop.zhubajie.com/5593955/evaluation.html"><img src="http://t5.zbjimg.com/r/pic/zbj4.gif" alt="鐚洓鎴? title="鑳藉姏绛夌骇锛氱尓鍥涙垝锛岃兘鍔涘€硷細4863"  align="absmiddle" /></a>
	        	        </span>
      </div>

      <p class="orange f14 mt10">        浜ょ锛?/p>
                    <p class="bidc">
            http://www.hjsq.cn/thread-503945-1-1.html<br />
http://www.xgrb.cn/bbs/read-htm-tid-4607683.html
            </p>
              <div class="ntos clearfix" id="h_74674023">
        <span class="time" title="2015-04-28 17:07:33">2015-04-28</span>
        鍙備笌缂栧彿 #<a class="bidid" href="http://task.zhubajie.com/5554404/74674023.html">74674023</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class="nobrowse">闆囦富鏈祻瑙?/span>                <a href="javascript:;" act-type="workscomment" act-href="http://task.zhubajie.com/api/worksComment-wid-74674023.html" id="c_74674023">璇勮</a>
                                <a href="javascript:;" act-type="report" act-href="http://u.zhubajie.com/report/index" act-data="cata=1&wid=74674023" class="report">涓炬姤</a>
            &nbsp;&nbsp;&nbsp;
        <div class="desc-mov">
                                                    </div>
              </div>
            <div id="wid_74674023"></div>
    </dd>
  </dl>
  <dl class="js-alert ">
    <dt><a target="_blank" href="http://shop.zhubajie.com/10184739/"><a class="user-card" act-data="uid=10184739&type=" href="http://shop.zhubajie.com/10184739/" target="_blank"><img id="avatar" src="http://avatar.zbjimg.com/010/18/47/200x200_avatar_39.jpg!small" class="touxiangall"  border="0" onerror="this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif""" alt="zbj绮惧噯鎺ㄥ箍" /></a></a>                           
                </dt>
    <dd>
        <div class="works-state "></div>
      <div class="usertitle">
            <a target="_blank" href="http://shop.zhubajie.com/10184739/">zbj绮惧噯鎺ㄥ箍</a>          
            <span class="titlelinks">
                      <a href="http://shop.zhubajie.com/10184739/evaluation.html"><img src="http://t5.zbjimg.com/r/pic/zbj4.gif" alt="鐚洓鎴? title="鑳藉姏绛夌骇锛氱尓鍥涙垝锛岃兘鍔涘€硷細2459"  align="absmiddle" /></a>	        
	        	        </span>
      </div>

      <p class="orange f14 mt10">        浜ょ锛?/p>
                    <p class="bidc">
            http://bbs.gxsky.com/thread-11894333-1-1.html<br />
http://www.xq0757.com/read.php?tid=959922
            </p>
              <div class="ntos clearfix" id="h_74674049">
        <span class="time" title="2015-04-28 17:08:16">2015-04-28</span>
        鍙備笌缂栧彿 #<a class="bidid" href="http://task.zhubajie.com/5554404/74674049.html">74674049</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class="nobrowse">闆囦富鏈祻瑙?/span>                <a href="javascript:;" act-type="workscomment" act-href="http://task.zhubajie.com/api/worksComment-wid-74674049.html" id="c_74674049">璇勮</a>
                                <a href="javascript:;" act-type="report" act-href="http://u.zhubajie.com/report/index" act-data="cata=1&wid=74674049" class="report">涓炬姤</a>
            &nbsp;&nbsp;&nbsp;                        
                        <div class="desc-mov">
                                                    </div>
              </div>
            <div id="wid_74674049"></div>
    </dd>
  </dl>
  <dl class="js-alert ">
    <dt><a target="_blank" href="http://shop.zhubajie.com/1441277/"><a class="user-card" act-data="uid=1441277&type=" href="http://shop.zhubajie.com/1441277/" target="_blank"><img id="avatar" src="http://avatar.zbjimg.com/001/44/12/200x200_avatar_77.jpg!small" class="touxiangall"  border="0" onerror="this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif""" alt="楂樿川閲忚鍧涙帹骞? /></a></a>
                            
                </dt>
    <dd>
        <div class="works-state "></div>
      <div class="usertitle">
            <a target="_blank" href="ht

我要提取:<p class=”bidc”> 与 </p> 之间的内容,如下列代码中的:

                    <p class="bidc">
            http://bbs.gxsky.com/thread-11894333-1-1.html<br />
http://www.xq0757.com/read.php?tid=959922
            </p>

http://bbs.gxsky.com/thread-11894333-1-1.html<br /> 和 http://www.xq0757.com/read.php?tid=959922

我的出毛病的代码【一】:

            Regex Reg = new Regex(@"<p\sclass=""bidc"">([^<]+)</p>", RegexOptions.IgnoreCase);
            MatchCollection matches = Reg.Matches(str);

            foreach (Match m in matches)
            {
                listBox1.Items.Add(m);
                sw.Write(m + "\r\n");
            }
            sw.Close();

这段代码只能取一行网址,两个标签只间如果有两行就什么也取不出来;
我的出毛病的代码【二】:

Regex Reg = new Regex(@"<p\sclass=""bidc"">([^$]+)</p>", RegexOptions.IgnoreCase);
            MatchCollection matches = Reg.Matches(str);

            foreach (Match m in matches)
            {
                listBox1.Items.Add(m);
                sw.Write(m + "\r\n");
            }
            sw.Close();

这段代码只能取一行网址,两个标签只的内容取到了,但是还把后面不需要的也取到了;

求高手指点!

40分
(?<=<p class="bidc">)[\s\S]*?(?=</p>)
好,我试试~~谢谢
哈哈~~成啦,谢谢你啦~~40分请收好~~
不过你忘了给双引号加双引号了,嗯,为了后来的兄弟姐妹们我要提示下!
static void RegexHtmlP()
        {
            string html = @"
</span>
      </div>

      <p class=""orange f14 mt10"">        浜ょ锛?/p>
                    <p class=""bidc"">
            http://www.jmbbs.com/forum.php?mod=viewthread&tid=3326260<br />
http://club.iweihai.cn/read-htm-tid-18259033.html
            </p>
              <div class=""ntos clearfix"" id=""h_74674016"">
        <span class=""time"" title=""2015-04-28 17:07:22"">2015-04-28</span>
        鍙備笌缂栧彿 #<a class=""bidid"" href=""http://task.zhubajie.com/5554404/74674016.html"">74674016</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class=""nobrowse"">闆囦富鏈祻瑙?/span>                <a href=""javascript:;"" act-type=""workscomment"" act-href=""http://task.zhubajie.com/api/worksComment-wid-74674016.html"" id=""c_74674016"">璇勮</a>
                                <a href=""javascript:;"" act-type=""report"" act-href=""http://u.zhubajie.com/report/index"" act-data=""cata=1&wid=74674016"" class=""report"">涓炬姤</a>
               
                        
                
        <div class=""desc-mov"">
                                                    </div>
              </div>
            <div id=""wid_74674016""></div>
      
      
     
    </dd>
  </dl>
  <dl class=""js-alert "">
    <dt><a target=""_blank"" href=""http://shop.zhubajie.com/5593955/""><a class=""user-card"" act-data=""uid=5593955&type="" href=""http://shop.zhubajie.com/5593955/"" target=""_blank""><img id=""avatar"" src=""http://avatar.zbjimg.com/005/59/39/200x200_avatar_55.jpg!small"" class=""touxiangall""  border=""0"" onerror=""this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif"""" alt=""gillian2"" /></a></a>
                            
                </dt>
    <dd>
        <div class=""works-state ""></div>
      <div class=""usertitle"">
            <a target=""_blank"" href=""http://shop.zhubajie.com/5593955/"">gillian2</a>
            
            <span class=""titlelinks"">
                      <a href=""http://shop.zhubajie.com/5593955/evaluation.html""><img src=""http://t5.zbjimg.com/r/pic/zbj4.gif"" alt=""鐚洓鎴? title=""鑳藉姏绛夌骇锛氱尓鍥涙垝锛岃兘鍔涘€硷細4863""  align=""absmiddle"" /></a>
	        	        </span>
      </div>

      <p class=""orange f14 mt10"">        浜ょ锛?/p>
                    <p class=""bidc"">
            http://www.hjsq.cn/thread-503945-1-1.html<br />
http://www.xgrb.cn/bbs/read-htm-tid-4607683.html
            </p>
              <div class=""ntos clearfix"" id=""h_74674023"">
        <span class=""time"" title=""2015-04-28 17:07:33"">2015-04-28</span>
        鍙備笌缂栧彿 #<a class=""bidid"" href=""http://task.zhubajie.com/5554404/74674023.html"">74674023</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class=""nobrowse"">闆囦富鏈祻瑙?/span>                <a href=""javascript:;"" act-type=""workscomment"" act-href=""http://task.zhubajie.com/api/worksComment-wid-74674023.html"" id=""c_74674023"">璇勮</a>
                                <a href=""javascript:;"" act-type=""report"" act-href=""http://u.zhubajie.com/report/index"" act-data=""cata=1&wid=74674023"" class=""report"">涓炬姤</a>
               
        <div class=""desc-mov"">
                                                    </div>
              </div>
            <div id=""wid_74674023""></div>
    </dd>
  </dl>
  <dl class=""js-alert "">
    <dt><a target=""_blank"" href=""http://shop.zhubajie.com/10184739/""><a class=""user-card"" act-data=""uid=10184739&type="" href=""http://shop.zhubajie.com/10184739/"" target=""_blank""><img id=""avatar"" src=""http://avatar.zbjimg.com/010/18/47/200x200_avatar_39.jpg!small"" class=""touxiangall""  border=""0"" onerror=""this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif"""" alt=""zbj绮惧噯鎺ㄥ箍"" /></a></a>                           
                </dt>
    <dd>
        <div class=""works-state ""></div>
      <div class=""usertitle"">
            <a target=""_blank"" href=""http://shop.zhubajie.com/10184739/"">zbj绮惧噯鎺ㄥ箍</a>          
            <span class=""titlelinks"">
                      <a href=""http://shop.zhubajie.com/10184739/evaluation.html""><img src=""http://t5.zbjimg.com/r/pic/zbj4.gif"" alt=""鐚洓鎴? title=""鑳藉姏绛夌骇锛氱尓鍥涙垝锛岃兘鍔涘€硷細2459""  align=""absmiddle"" /></a>	        
	        	        </span>
      </div>

      <p class=""orange f14 mt10"">        浜ょ锛?/p>
                    <p class=""bidc"">
            http://bbs.gxsky.com/thread-11894333-1-1.html<br />
http://www.xq0757.com/read.php?tid=959922
            </p>
              <div class=""ntos clearfix"" id=""h_74674049"">
        <span class=""time"" title=""2015-04-28 17:08:16"">2015-04-28</span>
        鍙備笌缂栧彿 #<a class=""bidid"" href=""http://task.zhubajie.com/5554404/74674049.html"">74674049</a>
          鏉ヨ嚜锛?a class=""likt"" href=""http://www.zhubajie.com"" target=""_blank"">鐚叓鎴掔綉</a>
        <span class=""nobrowse"">闆囦富鏈祻瑙?/span>                <a href=""javascript:;"" act-type=""workscomment"" act-href=""http://task.zhubajie.com/api/worksComment-wid-74674049.html"" id=""c_74674049"">璇勮</a>
                                <a href=""javascript:;"" act-type=""report"" act-href=""http://u.zhubajie.com/report/index"" act-data=""cata=1&wid=74674049"" class=""report"">涓炬姤</a>
                                       
                        <div class=""desc-mov"">
                                                    </div>
              </div>
            <div id=""wid_74674049""></div>
    </dd>
  </dl>
  <dl class=""js-alert "">
    <dt><a target=""_blank"" href=""http://shop.zhubajie.com/1441277/""><a class=""user-card"" act-data=""uid=1441277&type="" href=""http://shop.zhubajie.com/1441277/"" target=""_blank""><img id=""avatar"" src=""http://avatar.zbjimg.com/001/44/12/200x200_avatar_77.jpg!small"" class=""touxiangall""  border=""0"" onerror=""this.onerror=null;this.src=""http://t4.zbjimg.com/r/p/task/48.gif"""" alt=""楂樿川閲忚鍧涙帹骞? /></a></a>
                            
                </dt>
    <dd>
        <div class=""works-state ""></div>
      <div class=""usertitle"">
            <a target=""_blank"" href=""ht
";
            Regex.Matches(html, @"(?<=<p class=""bidc"">)[\s\S]*?(?=</p>)").Cast<Match>().ToList().ForEach(x =>
            {
                Console.WriteLine(x.Value); 
            });
        }
因为我是在notpad++测试的正则,所以肯定不是””或者”

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