Regex C# replace matched fields with multiple results -


i have text:

iif(instr(|wellington, new zealand|,|,|)>0,|wellington, new zealand|,|wellington, new zealand| & |, | & |new zealand|) & | | & iif(instr(|jeddah, saudi arabia|,|,|)>0,|jeddah, saudi arabia|,|jeddah, saudi arabia| & |, | & |saudi arabia|) & iif(|jeddah, saudi arabia|=||,||,| via | & |jeddah, saudi arabia|)

i can regex text (below) collection of of elements between | characters. 18 matches, match #1 being |,|

matchcollection fields = regex.matches(str, @"\|.*?\|");

i want replace each of matches place holder ~0~, ~1~, ~2~ etc ~17~ can run rest of code. don't care if of common text replaced same place holder leave gaps in place holders if use 18.

my problem can't straight replace replacing element #1 (|,|) in part of string |jeddah, saudi arabia|,|,| replace first instance finds, regex correctly recognizes |jeddah, saudi arabia| 1 match , |,| match.

the result seek this:

iif(instr(~0~,~1~)>0,~0~,~0~ & ~2~ & ~3~) & ~4~ & iif(instr(~5~,~1~)>0,~5~,~5~ & ~2~ & ~6~) & iif(~5~=~7~,~7~,~8~ & ~5~)

with increasing numbers being in array build once know how many matches have. keep original values , swap them later on easy part.

i use lambda functions:

// 1 gets index list of matches private static string lookupreplace(string text, list<string> newlist) {     var result = "~" + newlist.indexof(text).tostring() + "~";     return result; }  // 1 increments global counter private static string numberedreplace() {     i++;     return "~" + i.tostring() + "~"; }  public static int = -1;  public static void main() {        string text = "iif(instr(|wellington, new zealand|,|,|)>0,|wellington, new zealand|,|wellington, new zealand| & |, | & |new zealand|) & | | & iif(instr(|jeddah, saudi arabia|,|,|)>0,|jeddah, saudi arabia|,|jeddah, saudi arabia| & |, | & |saudi arabia|) & iif(|jeddah, saudi arabia|=||,||,| via | & |jeddah, saudi arabia|)";     var re = new regex(@"\|.*?\|");     var newlist = re.matches(text)                     .oftype<match>()                     .select(m => m.value)                     .tolist();     // first replace index     string result = re.replace(text, x => lookupreplace(x.value, newlist));     console.writeline(result);      // second replace counter     result = re.replace(text, x => numberedreplace());     console.writeline(result); }

ideone demo

output of each replace:

iif(instr(~0~,~1~)>0,~0~,~0~ & ~4~ & ~5~) & ~6~ & iif(instr(~7~,~1~)>0,~7~,~7~ & ~4~ & ~12~) & iif(~7~=~14~,~14~,~16~ & ~7~) iif(instr(~0~,~1~)>0,~2~,~3~ & ~4~ & ~5~) & ~6~ & iif(instr(~7~,~8~)>0,~9~,~10~ & ~11~ & ~12~) & iif(~13~=~14~,~15~,~16~ & ~17~)

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