删除自定义标记标记所需的正则表达式

Question

我以前没有写过正则表达式，我的知识非常不足。我希望这里的专家能够帮助我使用一个正则表达式，我可以在C#中使用它来删除标记标记。

该标记具有以下开始标记之一：<AI>!、<AH>!或<AG>!，并以另一个!结束

示例：the quick brown <AI>!fox jumps! over the lazy dog!

删除标记后应为：the quick brown fox jumps over the lazy dog!

代码片段：

    NOT MORE THAN 85 % OF H<AH>!3!BO<AH>!3! CALCULATED ON THE DRY WEIGHT
- Uranium ores and pitchblende, and concentrates thereof, with a uranium content of more than 5 % by weight (<AI>!Euratom!)
- Monazite; urano-thorianite and other thorium ores and concentrates, with a thorium content of more than 20 % by weight (<AI>!Euratom!)
- - - -   -94% or more, but not more than 98.5% of a-Al<AH>!2!O<AH>!3!  -2% (+/-1.5%) of magnesium spinel,  -1% (+/-0.6%) of yttrium oxide and   -2% (+/-1.2%) of each lanthanum oxide and neodymium oxide  with less than 50% of the total weight having a particle size of more than 10mm
- Activated alumina with a specific surface area of at least 350 m<AG>!2!g
IRON OXIDES AND HYDROXIDES; EARTH COLOURS CONTAINING 70 % OR MORE BY WEIGHT OF COMBINED IRON EVALUATED AS FE<AH>!2!O<AH>!3!:
- <AI>!o!-Xylene
- <AI>!m!-Xylene
- <AI>!p!-Xylene
- - - 1,6,7,8,9,14,15,16,17,18,18-Dodecachloropentcyclo[12.2.1.1<AG>!6,9!.0<AG>!2,13!.0<AG>!5,10!]octadeca-7,15-diene, (CAS RN 13560-89-9)
- Chlorobenzene, <AI>!o!-dichlorobenzene and <AI>!p!-dichlorobenzene
- - - Di- or tetrachlorotricyclo[8.2.2.2<AG>!4,7!]xadeca-1(12),4,6,10,13,15-hexaene, mixed isomers
- Butan-1-ol (<AI>!n!-butyl alcohol)
- - 2-Methylpropan-2-ol (<AI>!tert!-butyl alcohol)
- <AI>!n!-Butyl acetate
- <AI>!O!-Acetylsalicylic acid, its salts and esters
- - <AI>!O!-Acetylsalicylic acid (CAS RN 50-78-2)
- 1-Naphthylamine (<AH>!alpha!-naphthylamine), 2-naphthylamine (<AI>!beta!-naphthylamine) and their derivatives; salts thereof
- <AI>!o!-, <AG>!m!-, <AH>!p!-Phenylenediamine, diaminotoluenes, and their derivatives; salts thereof:
- - <AI>!o!-, <AI>!m!-, <AI>!p!-Phenylenediamine, diaminotoluenes and their halogenated, sulphonated, nitrated and nitrosated derivatives; salts thereof:
- - Indole, 3-methylindole (skatole), 6-allyl-6,7-dihydro-5<AI>!H!-dibenz[<AI>!c,e!] azepinne (azapetine), phenindamine (INN) and their salts; imipramine hydrochloride (INNM)
- Vitamin B<AH>!1! and its derivatives
- Vitamin B<AH>!2! and its derivatives

提前谢谢你

Answer 1

要使用的正则表达式将查找A，后跟<>!中包含的GHI之一。找到后，它将对一个或多个(+)任何内容(.)执行惰性搜索(由表示)，并后跟一个感叹号。它是懒惰的，所以在找到样本中的最后一个感叹号之前，它不会进行查找，而是会停在第一个感叹号处，并替换它找到的内容。然后它将使用grouping (模式中的括号)来存储标签中包含的值，并在替换时使用它($1表示第一个组)。

var r = new Regex("<A[GHI]>!(.+?)!");
var actual = r.Replace(xml, "$1");

Answer 2

要使用的正则表达式必须如下所示：

\<..\>!([^!]*)!

因为您必须匹配<两个字母>！一系列不带a！的字符最后是一个！再来一次。

然后用捕获的匹配项(即括号之间的文本)替换匹配项(匹配上面表达式的整个文本)。

Answer 3

using System;
using System.Text.RegularExpressions;

public class Example
{
   public static void Main()
   {
       string pattern =  @"\<A(G|H|I)\>\!([^\!]*)\!";
       string input = "<AI>!n!-Butyl acetate the quick brown "
           + "<AI>!fox jumps! over the lazy dog!";
       string replacement = "$2";
       Regex rgx = new Regex(pattern);
       string result = rgx.Replace(input, replacement);

       Console.WriteLine("Original String:    '{0}'", input);
       Console.WriteLine("Replacement String: '{0}'", result);                             
    }
}

Original String:    '<AI>!n!-Butyl acetate the quick brown <AI>!fox jumps! over the lazy dog!'
Replacement String: 'n-Butyl acetate the quick brown fox jumps over the lazy dog!'

http://ideone.com/z0fbL