c# - How to split string with Regex.Split and keep all separators?

Question

How to split string with Regex.Split and keep all separators?

I have a string:"substring1 delimeter1 substring2" , where delimeter+substring2 is a part of address.

Also i have 2 and more delimeters: delim1,delim2 wich are equivalent in meaning;

And i want to get string array like this:

arr[0]="subsctring1";
arr[1]="delim1 subsctring2";

or,

arr[1]="delim2 subsctring2;

I have a pattern:

addrArr= Regex.Split(inputText, String.Concat("(?<=",delimeter1, "|",delimeter2, ")"), RegexOptions.None);

But it not works well.

Can you help me to create a valid pattern to to that?

Answer 1

I think you need to use a lookahead, not a lookbehind, for this to work (haven't tried it though).

Also, you have to be careful with the separators; they must be escaped to work correctly as patterns in the regex.

Try this:

addrArr= Regex.Split(inputText, string.Format("(?={0}|{1})", Regex.Escape(delimeter1), Regex.Escape(delimeter2)), RegexOptions.None);