C# 怎么用正则表达式提取下面的内容
日期：2014-05-18 浏览次数：21104 次
C# 如何用正则表达式提取下面的内容
<tr class=thead><td>109.74.51.211</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:02:32</td></tr>
<tr ><td>190.204.178.189</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr class=thead><td>190.206.106.82</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr ><td>41.217.164.78</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr class=thead><td>91.99.224.106</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td><img border=0 src=/images/country_icons/ir.gif> IRAN, ISLAMIC REPUBLIC OF</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr ><td>186.207.138.4</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:05:38</td></tr>
<tr class=thead><td>212.45.12.10</td><td><img border=0 src=/picit.php?q=ZmRlBN%253Q%253Q></td><td>High Anonymous</td><td><img border=0 src=/images/country_icons/ru.gif> RUSSIAN FEDERATION</td><td>MOSKVA</td><td>MOSCOW</td><td>00:05:38</td></tr>
如何写正则表达式提取上面内容中蓝色的字段， 就是提取所有包含红色字段的行里的蓝色字段。
本人菜鸟，试了很久还是得不到结果，望高手来。
------解决方案--------------------
<tr class=thead><td>109.74.51.211</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:02:32</td></tr>
<tr ><td>190.204.178.189</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr class=thead><td>190.206.106.82</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr ><td>41.217.164.78</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr class=thead><td>91.99.224.106</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td><img border=0 src=/images/country_icons/ir.gif> IRAN, ISLAMIC REPUBLIC OF</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr ><td>186.207.138.4</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:05:38</td></tr>
<tr class=thead><td>212.45.12.10</td><td><img border=0 src=/picit.php?q=ZmRlBN%253Q%253Q></td><td>High Anonymous</td><td><img border=0 src=/images/country_icons/ru.gif> RUSSIAN FEDERATION</td><td>MOSKVA</td><td>MOSCOW</td><td>00:05:38</td></tr>
如何写正则表达式提取上面内容中蓝色的字段， 就是提取所有包含红色字段的行里的蓝色字段。
本人菜鸟，试了很久还是得不到结果，望高手来。
------解决方案--------------------
- C# code
string str = @"<tr class=thead><td>109.74.51.211</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:02:32</td></tr>
<tr ><td>190.204.178.189</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr class=thead><td>190.206.106.82</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:03:34</td></tr>
<tr ><td>41.217.164.78</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr class=thead><td>91.99.224.106</td><td><img border=0 src=/picit.php?q=BQN%253Q></td><td>High Anonymous</td><td><img border=0 src=/images/country_icons/ir.gif> IRAN, ISLAMIC REPUBLIC OF</td><td>-</td><td>-</td><td>00:04:35</td></tr>
<tr ><td>186.207.138.4</td><td><img border=0 src=/picit.php?q=BQN4ZN%253Q%253Q></td><td>High Anonymous</td><td>-</td><td>-</td><td>-</td><td>00:05:38</td></tr>
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