CODEWITHSUNDEEP
c#regex
Anatoly
Anatoly

Reputation: 1916

How to combine multiple .net regex into one?

var keyList = new[] { "AccountKey", "PrivateKey", "APIKey", "DefectiveKeyGracefulExpiration" };
var multiplePatternMatching = string.Format("({0})", string.Join("|", keyList));
var keyRegex = string.Format(@"(?s)<([\s<]?{0}[\s<]*)>.*?</\1>", multiplePatternMatching);

And I have another regex:

var passwordRegex = @"(?si)<([^\s<]*password[^\s<]*)>.*?</\1>";

How to combine keyRegex and passwordRegex into one regex? I known that I need to use | but I don't know how.

I'm trying to use | like this:

var keyOrPasswordRegex = string.Format( @"(?s)<([\s<]?{0}[\s<]*)>.*?</\1>|(?si)<([^\s<]*password[^\s<]*)>.*?</\2>", multiplePatternMatching);

but it's doesnt work

Input:

<job xmlns:i="..." xmlns="...">
<password>asdfasdf</password>
<adminPassword>asd</adminPassword>
<AccountKey>asd</AccountKey>
<AccountKeyZ>asd</AccountKeyZ>
...</job>

Actual result:

<job xmlns:i="..." xmlns="...">
 <></>
 ​<></>
​<AccountKey></AccountKey>
​<AccountKeyZ>asd</AccountKeyZ>
​...</job>

Expected result:

<job xmlns:i="..." xmlns="...">
<password></password>
<adminPassword></adminPassword>
<AccountKey></AccountKey>
<AccountKeyZ>asd</AccountKeyZ>
...</job>

Upvotes: 0

Views: 647

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626738

You need an alternation like this:

var keyList = new[] { "AccountKey", "PrivateKey", "APIKey", "DefectiveKeyGracefulExpiration" };
var multiplePatternMatching = string.Format("({0})", string.Join("|", keyList));
var rx = string.Format(@"(?si)<([^\s<]*password[^\s<]*|{0})>.*?</\1>", multiplePatternMatching);
Console.WriteLine(Regex.Replace(s, rx, "<$1></$1>"));

See the IDEONE demo and a regex demo. Explanation:

  • < - a literal <
  • ([^\s<]*password[^\s<]*|{0}) - (Group 1) 0+ characters other than whitespace and < followed with a word password and followed with 0+ characters other than whitespace and < or an alternation group of AccountKey, PrivateKey, APIKey or DefectiveKeyGracefulExpiration (those listed in the multiplePatternMatching variable)
  • > - a literal >
  • .*?</\1> - any 0+ symbols, as few as possible, up to the first </ followed with the contents of the first capture group and >.

Upvotes: 2

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