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c#asp.netregexstringreplace
NeoStack
NeoStack

Reputation: 3

Regex Allow alphanumeric with specific special characters dot net

I have big .txt file which I am reading using StreamReader (C# .NET).

My requirement is to replace any of the special characters not in the list to replace with space in entire string (multiple occurrences).

List of special characters allowed is & / - ' . ) (.

So far, I have tried this but it is not working the way I want it:

aLine = Regex.Replace(aLine, "[^0-9A-Za-z().&'/-]+$", " ");

Upvotes: 0

Views: 2445

Answers (1)

hwnd
hwnd

Reputation: 70732

Your current regex is doing this:

String input = "123abc[]]]]]]456:$def";
String aLine = Regex.Replace(input, "[^0-9A-Za-z().&'/-]+$", " ");
//=> "123abc[]]]]]]456:$def" 
      ^^^^^^^^^^^^^^^^^^^^^ original string (did not replace)

Remove the end of string $ anchor:

String input = "123abc[]]]]]]456:$def";
String aLine = Regex.Replace(input, "[^0-9A-Za-z().&'/-]+", " ");
//=> "123abc 456 def"

If you want to leave a space for every instance, remove the quantifier:

String input = "123abc[]]]]]]456:$def";
String aLine = Regex.Replace(input, "[^0-9A-Za-z().&'/-]", " ");
//=> "123abc       456  def"

Upvotes: 2

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