求助:正则表达式

Question

现有以下2种tr：
1.
<tr xxx>
<td xxx>(需要的内容)</td>
<td xxx>(需要的内容)</td>
<td xxx>(需要的内容)</td>
...(共i个td，i为固定值)
</tr>
2.
<tr xxx>
<td xxx>(需要的内容)</td>
...前面共l个简单td，l固定
<td xxx>
<table>
<tr>
<td xxx>(需要的内容)</td>
</tr>
</table>
</td>
<td xxx>(需要的内容)</td>
...再m个简单td
<td xxx>
<table>
<tr>
<td xxx>(需要的内容)</td>
</tr>
</table>
</td>
<td xxx>(需要的内容)</td>
...n个简单td
</tr>
l+m+n+2=i
也就是说在同样i个td中，固定的2个位置各有一个包含table的td，table中都只有1个tr和1个td在同一个table中以上2种tr以随机的数量和顺序夹杂
请问我想取得其中所需部分该如何写正则表达式？现在利用
<tr[^>]*>((?:.*?(?=<table|</tr>)(?(<table)<table[^>]*>.*?</table>.*?|))*?)</tr>
可以取得一个tr之间的所有内容，但是要获取其中各td里的内容还需要再用一次正则，比较麻烦，有没有办法直接取得一个tr中的所有所需内容谢谢！

Answer 1

没太明白你的意思，看看这是不是你想要的结果吧string yourStr = .........;
MatchCollection mc = Regex.Matches(yourStr, @"<td[^>]*>(?<content>[^<>]*)</td>", RegexOptions.IgnoreCase);
foreach (Match m in mc)
{
    richTextBox2.Text += m.Groups["content"].Value + "\n";
}

Answer 2

string s=@"<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a1</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b1</a>
                        </td>
                    <td width=32% align='left'>
                      <a href='/default.aspx' target=_blank><font color=#ffffff>c1</font></a>
                      </td>
                    <td width=8% align='center'></td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d1</a></td>
                    <td width=10% align='center'>e1</td>
                    <td width=6% align='center'>f1</td>
                    <td width=4% align='center'><a href='javascript:void();' >g1</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h1</td></form>
                  </tr>
<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a2</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b2</a>
                        </td>
                    <td width=32% align='left'>
                      <a href='/default.aspx' target=_blank><font color=#ffffff>c2</font></a>
                      </td>
                    <td width=8% align='center'></td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d2</a></td>
                    <td width=10% align='center'>e2</td>
                    <td width=6% align='center'>f2</td>
                    <td width=4% align='center'><a href='javascript:void();' >g2</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h2</td></form>
                  </tr>
<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a3</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b3</a>
                        </td>
                    <td width=32% align='left'>
                      <a href='/default.aspx' target=_blank><font color=#ffffff>c3</font></a>
                      </td>
                    <td width=8% align='center'></td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d3</a></td>
                    <td width=10% align='center'>e3</td>
                    <td width=6% align='center'>f3</td>
                    <td width=4% align='center'><a href='javascript:void();' >g3</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h3</td></form>
                  </tr>";
string p=@"<tr[^>]*?>(?:(?!<td).*?<td[^>]*?>((?!</td>).*?)</td>){9}(?!</tr>).*?</tr>";
Regex r=new Regex(p,RegexOptions.Singleline | RegexOptions.IgnoreCase);
Match m=r.Match(s);
while(m.Success)
{
foreach(Capture c in m.Groups[1].Captures)
{
Console.WriteLine(c.Value);
}
m=m.NextMatch();
}==========================================================
如上，每次match可以获得a1-h1所有值（事实上应该是10个，但这句有点问题，当中一个空的没能匹配，就先改成{9}了，先发上来再说）
但是如果其中一个，比如
                      <td width=5% align='center'>a3</td>
改成
                      <td width=5% align='center'>
                        <a href='default.asp'>a3</font></a>
                        <div id="Layer3" style="width:25px">
                          <table width="100%" border="0" bgcolor=#ffffff style="border:1px solid black;">
                            <tr>
                              <td class=c1>i3(忘了，多个table时这个也要)<br></td>
                            </tr>
                          </table>
                        </div>
                      </td>
的话，这样就不对了，但是我仍然希望能够像上面一样，一次match把a1-h1(可能还有i1,j1)都得到
(实际遇到的是其中4、5两个td有可能变成如上形式，要变2个一起变)
不知道这样是否够清楚了

Answer 3

string yourStr = .........;
MatchCollection mc = Regex.Matches(yourStr, @"<td[^>]*>(?<content>[\s\S]*?)</td>", RegexOptions.IgnoreCase);
foreach (Match m in mc)
{
    richTextBox2.Text += m.Groups["content"].Value + "\n";
}就你楼上的例子，这样取出来的是30条数据，看看是不是你想的结果，如果不是，只说你要的结果就行了

Answer 4

是的，30个没错，但是后面提到的却没解决如下:需要得到的是
a1-h1 加一个空格
a2-k2
a3-k3
你提供的表达式在获取c2 c3 j2 j3 i2 i3 k2 k3时不正确
string s=@"<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a1</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b1</a>
                        </td>
                    <td width=32% align='left'>
                      <a href='/default.aspx' target=_blank><font color=#ffffff>c1</font></a>
                      </td>
                    <td width=8% align='center'></td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d1</a></td>
                    <td width=10% align='center'>e1</td>
                    <td width=6% align='center'>f1</td>
                    <td width=4% align='center'><a href='javascript:void();' >g1</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h1</td></form>
                  </tr>
<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a2</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b2</a>
                        </td>
                    <td width=32% align='left'>
                     <td width=5% align='center'>
                        <a href='default.asp'>c2</font></a>
                        <div id='Layer3' style='width:25px'>
                          <table width='100%' border='0' bgcolor=#ffffff style='border:1px solid black;'>
                            <tr>
                              <td class=c1>i2(忘了，多个table时这个也要)<br/></td>
                            </tr>
                          </table>
                        </div>
                      </td>
                     <td width=5% align='center'>
                        <a href='default.asp'>j2</font></a>
                        <div id='Layer3' style='width:25px'>
                          <table width='100%' border='0' bgcolor=#ffffff style='border:1px solid black;'>
                            <tr>
                              <td class=c1>k2(忘了，多个table时这个也要)<br/></td>
                            </tr>
                          </table>
                        </div>
                      </td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d2</a></td>
                    <td width=10% align='center'>e2</td>
                    <td width=6% align='center'>f2</td>
                    <td width=4% align='center'><a href='javascript:void();' >g2</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h2</td></form>
                  </tr>
<tr height=20 align=center>
                    <td width=3% align='center'>
                      &nbsp;&nbsp;
                      </td>
                    <td width=5% align='center'>a3</td>
                    <td width=20% align='left'>&nbsp;<a href='/index.asp' target=_blank>b3</a>
                        </td>
                    <td width=5% align='center'>
                        <a href='default.asp'>c3</font></a>
                        <div id='Layer3' style='width:25px'>
                          <table width='100%' border='0' bgcolor=#ffffff style='border:1px solid black;'>
                            <tr>
                              <td class=c1>i3(忘了，多个table时这个也要)<br/></td>
                            </tr>
                          </table>
                        </div>
                      </td>
                     <td width=5% align='center'>
                        <a href='default.asp'>j3</font></a>
                        <div id='Layer3' style='width:25px'>
                          <table width='100%' border='0' bgcolor=#ffffff style='border:1px solid black;'>
                            <tr>
                              <td class=c1>k3(忘了，多个table时这个也要)<br/></td>
                            </tr>
                          </table>
                        </div>
                      </td>
                    <td width=12% align='left'><a href='/index.htm' target=_blank>d3</a></td>
                    <td width=10% align='center'>e3</td>
                    <td width=6% align='center'>f3</td>
                    <td width=4% align='center'><a href='javascript:void();' >g3</a></td>
                    <form name='form1' method='post' 
action='add.asp' target='_blank'><td width='4%' align='center'>
h3</td></form>
                  </tr>";
另外补充一下,这段正则是一整段表达式的一部分，其他部分是为了把这段分离出来,因此只可能匹配一次，所以最理想是一次match能捕获全部内容,不知道可不可能...

Answer 5

string result = "";
MatchCollection mc = Regex.Matches(yourStr, @"<td[^>]*>(?<content>[\s\S]*?)</td>", RegexOptions.IgnoreCase);
foreach (Match m in mc)
{
    result = Regex.Replace(m.Groups["content"].Value, @"<[^>]*>", "");
    result = result.Replace("&nbsp;", "");
    result = result.Trim();
    richTextBox2.Text += result + "\n";
}

Answer 6

很接近了，不过还是有些问题
看来想要一次match就解决恐怕比较麻烦，即使搞出来了表达式也太复杂，就乖乖的多做几个循环吧感谢lxcnn(过客) 的帮助