C＃REGEX：负面模式替换

Question

我设法找到一个匹配特定数据的漂亮模式，但我正在寻找在Regex.Replace方法中使用的反模式来清理无用的数据。

原始字符串：

<h3>Non-Human Toxicity Values:</h3>
<br />LD50 Rat oral 100 mg/kg /SRP: percent solution not specified/<br /><br />LD50 Rat (albino) oral 2020 mg/kg /From table/ /SRP: percent solution not specified/<br /><br />LD50 Rat oral 800 mg/kg /from table/<br /><br />LD50 Rat sc 420 mg/kg<br /><br />LC50 Rat inhalation 0.82 mg/L (1/2 hour)<br /><br />LC50 Rat inhalation 0.48 mg/L/4 hr<br /><br />LD50 Rat iv 87 mg/kg /Source contains no data on purity of the compound/<br /><br />LD50 Mouse oral 42 mg/kg /Source contains no data on purity of the compound/<br /><br />LD50 Mouse sc 300 mg/kg /Source contains no data on purity of the compound/<br /><br />LC50 Mouse inhalation 400 mg/cu m/2 hr /Source contains no data on purity of the compound/<br /><br />LC50 Mouse inhalation 0.414 mg/L/4 hr<br /><br />LD50 Mouse ip 16 mg/kg /From table/<br /><br />LD50 Guinea pig oral 260 mg/kg /Source contains no data on purity of the compound/<br /><br />LD50 Rabbit percutaneous 270 mg/kg /<font color="red"><strong>Formalin</strong></font>/<br /><br />LD50 Rabbit sc 240 mg/kg /From table/<br /><br />LD50 Dog sc 550 mg/kg /From table/<br /><br />

我需要的只是鼠和兔的价值观。

我使用((LD|LC)50 (Rat)|(Rabbit)).*?(/kg|/L/l)匹配这些值，但我想要一个方法，以便任何不是特定模式的东西被替换。

我在其他线程中环顾四周，但解决方案是特定字符类型（数字，非数字，非单词等）的排他性。在这里，我正在寻找一种模式。

Answer 1

运行正则表达式匹配时 - 您可以采用匹配组并按照您希望的方式组合它们吗？ 例如：

string input = @"<h3>Non-Human Toxicity Values:</h3>
<br />LD50 Rat oral 100 mg/kg /SRP: percent solution not specified/
<br /><br />LD50 Rat (albino) oral 2020 mg/kg /From table/ /SRP: percent solution not specified/
<br /><br />LD50 Rat oral 800 mg/kg /from table/
<br /><br />LD50 Rat sc 420 mg/kg
<br /><br />LC50 Rat inhalation 0.82 mg/L (1/2 hour)
<br /><br />LC50 Rat inhalation 0.48 mg/L/4 hr
<br /><br />LD50 Rat iv 87 mg/kg /Source contains no data on purity of the compound/
<br /><br />LD50 Mouse oral 42 mg/kg /Source contains no data on purity of the compound/
<br /><br />LD50 Mouse sc 300 mg/kg /Source contains no data on purity of the compound/
<br /><br />LC50 Mouse inhalation 400 mg/cu m/2 hr /Source contains no data on purity of the compound/
<br /><br />LC50 Mouse inhalation 0.414 mg/L/4 hr
<br /><br />LD50 Mouse ip 16 mg/kg /From table/
<br /><br />LD50 Guinea pig oral 260 mg/kg /Source contains no data on purity of the compound/
<br /><br />LD50 Rabbit percutaneous 270 mg/kg /<font color=""red""><strong>Formalin</strong></font>/
< br />< br /> LD50 Rabbit sc 240 mg / kg / From table /
      < br />< br /> LD50 Dog sc 550 mg / kg / From table /
            < br />< br /> ";

            Regex ratRabbitRegex = new Regex(@"(?<Pattern>(LD|LC)\d\d (Rat|Rabbit) (\w|\s|/)+)");

            var matches = ratRabbitRegex.Matches(input);

            var result = new List<string>();

            for (int id = 0; id < matches.Count; id++)
            {
                result.Add(matches[id].Groups["Pattern"].Value);
            }

现在，您可以根据需要格式化结果集合中的字符串。