查找 2 个已知值之间的字符串 [英] Find a string between 2 known values

问题描述

我需要能够提取 2 个标签之间的字符串，例如:00002" from "morenonxmldata0002morenonxmldata"

I need to be able to extract a string between 2 tags for example: "00002" from "morenonxmldata<tag1>0002</tag1>morenonxmldata"

我使用的是 C# 和 .NET 3.5.

I am using C# and .NET 3.5.

推荐答案

无需正则表达式的解决方案:

Solution without need of regular expression:

string ExtractString(string s, string tag) {
     // You should check for errors in real-world code, omitted for brevity
     var startTag = "<" + tag + ">";
     int startIndex = s.IndexOf(startTag) + startTag.Length;
     int endIndex = s.IndexOf("</" + tag + ">", startIndex);
     return s.Substring(startIndex, endIndex - startIndex);
}

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