求正则

[验证码识别]

s = "...<tr>...12345...</tr>..."

...为数目不定的任意字符, 可能含有多个 <tr> 或 </tr>


要求匹配到12345， 以<tr>开始 </tr>结束的最小匹配


正则表达怎么写？

[-过客-]

<tr>和</tr>之间必须包含12345？还是什么意思？

[-过客-]

这样？

(?isn)<tr>((?!</?tr\b).)*12345((?!</?tr\b).)*</tr>

如果是取必须包含12345的

string s = "...<tr>...98765...</tr>......<tr>...12345...</tr>...<tr>...54321...</tr>...";
Regex reg = new Regex(@"(?isn)<tr>((?!</?tr\b).)*12345((?!</?tr\b).)*</tr>");
MatchCollection mc = reg.Matches(s);
foreach (Match m in mc)
{
    richTextBox2.Text += m.Value + "\n";
}
/*-----输出------
<tr>...12345...</tr>
*/

如果就是取<tr>...</tr>间的内容

string s = "...<tr>...98765...</tr>......<tr>...12345...</tr>...<tr>...54321...</tr>...";
Regex reg = new Regex(@"(?isn)<tr>((?!</?tr\b).)*</tr>");
MatchCollection mc = reg.Matches(s);
foreach (Match m in mc)
{
    richTextBox2.Text += m.Value + "\n";
}
/*-----输出------
<tr>...98765...</tr>
<tr>...12345...</tr>
<tr>...54321...</tr>
*/

[Mr-Jee]

不会就是这个吧、
string s = "<tr>...<tr>...12345...</tr>...</tr>";
Regex reg = new Regex("(?i)<tr>((?!<tr>).)*?12345.*?</tr>");
Console.WriteLine(reg.Match(s).Value);

[验证码识别]

感谢楼上回复!

有简单的写法吗?

如果是

...为数目不定的任意字符

s = "...<tr>...12345...56789...54321...</tr>..."

匹配 <tr>...12345...56789...54321...</tr> (<tr>只出现一次)


能有简洁的写法吗?

[-过客-]

[Quote=引用 4 楼 yzm888 的回复:]
s = "...<tr>...12345...56789...54321...</tr>..."

匹配 <tr>...12345...56789...54321...</tr> (<tr>只出现一次)

能有简洁的写法吗?
[/Quote]

<tr>只出现一次的话

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

[Mr-Jee]

简明的写法是什么意思
你别举例子了。你就拿实际需求来说事吧

[-过客-]

因为<tr>只出现一次，所以也没必要用MatchCollection 了，直接用Match 就行了

string s = "...<tr>...12345...56789...54321...</tr>...";
Regex reg = new Regex(@"(?is)<tr>.*?</tr>");
Match m = reg.Match(s);
if(m.Success)
{
    richTextBox2.Text = m.Value ;
}
/*-----输出------
<tr>...12345...56789...54321...</tr>
*/

[fos_jpg]

[Quote=引用 7 楼 lxcnn 的回复:]

因为<tr>只出现一次，所以也没必要用MatchCollection 了，直接用Match 就行了

C# code
string s = "...<tr>...12345...56789...54321...</tr>...";
Regex reg = new Regex(@"(?is)<tr>.*?</tr>");
Match m = reg.Match(s);
if(m.Succes……
[/Quote]


能讲一下(?is) 啥意思吗？

[fos_jpg]

<tr>[\s\S]*?</tr> 貌似这样也行