请问，为什么提取到的都是空值呢，正则写错了吗？

[dzh523]

string s = ...
<td row="1" width="33.3%" class="" style="cursor:pointer" >5510</td>
<td row="1" width="33.3%" class="" style="cursor:pointer" >1060</td>
...;

var matches = Regex.Matches(s, "(?<=.*pointer.*>).{4,5}(?=.*</td)");
String[] ss = new String[7];
int j = 0;
foreach (Match item in matches)
{
ss[j] = item.ToString().Trim(); j++;
}

提取5510等几个数字，然后打印
for (int i = 0; i < ss.Length; i++) { Trace.WriteLine(ss[i]); }

可是打印出来的全是空值，为什么啊？

[bdmh]

"(?<=\.\*pointer\.\*>)[\d]+(?=</td>)"

[q107770540]

引用 楼主 dzh523 的回复:

string s = ... <td row="1" width="33.3%" class="" style="cursor:pointer" >5510</td> <td row="1" width="33.3%" class="" style="cursor:pointer" >1060</td> ...; var matches = Regex.Matches(s, "(?<=.*pointer.*>).{4,5}(?=.*</td)");

var matches = Regex.Matches(s, "(?<=.*?pointer[^>]*?>)[^<>]{4,5}(?=</td)");

[夜轻风]

(?<=pointer[^>]+>)[^<]{4,5}(?=</td)

如果要匹配的数字一定是整数也可以把[^<]{4,5}换成\d{4,5}

[liuyilin888]

别搞的太复杂，简单才是王道 >(\d*?)<