Regex and split

jean tindel

Hey everybody !

i've got some troubles to split a text, i need to split it according to chars, like "|" ," :" , or" \n", but i also need to split it according to Regex, and the method split(char[]) doesn't allow regex, when i try this :

string[] separators = { "|", "!", ":", "\n", @"=...+" }; string[] SplittedText = alltext.Split(separators,StringSplitOptions.RemoveEmptyEntries);

the last one doesn't work and my result array "splittedtext" still contains the lines with "========= ....." is there a solution except the fact to first split my text according to @"=...+" and then split it again according to "|", "!", ":", "\n" ???

THX !

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Vulpes11y ago
The string split variation I gave earlier would work on that line leaving just the '+' signs which I assume represents any amount of text which doesn't include '=' signs.
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jean tindel11y ago
hey actually i want to split a whole line who looks like "=====+=====+=======" but i finally combine Regex.Split follow by String.split and it works :) but it's slower....
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Vulpes11y ago
The @ sign is only used with string constants when you want the compiler to read an escape sequence such as \n 'literally' i.e. a back slash followed by the letter 'n' rather than as the line feed character (ASCII 10).

If you're reading the string in from a file then there's no need to decorate it with an @ whatever it contains.

I'm not sure that Ramchand needed to use it in his example anyway as when you used "\n" I suspect you did in fact mean the line feed character rather than a backslash followed by an 'n'.

When you used the expression @"=...+" did you in fact intend it to be read literally?

If you meant an indefinite number of consecutive '=' signs (but at least one), then this should work:

string[] separators = { "|", "!", ":", "\n", "="};
string[] SplittedText = alltext.Split(separators,StringSplitOptions.RemoveEmptyEntries);

However, if you meant anything more complicated than that then you'll probably need to use Regex.Split which is much more powerful than string.Split.

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jean tindel11y ago
hey Ramchand,

yeah your solution works fine but my input file is not in "raw" if you know what i mean, i am using "string alltext = File.ReadAllText( string PathOfFile)"

and in this case, where should i write the "@" ?
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Ramchand Repalle11y ago
Hello jean,

I have tried with the separators you mentioned above. It seems working fine..

Please check with dotnet fiddle code once: https://dotnetfiddle.net/Y6Js0D

Thanks,
Ramchand
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