Substring between two characters

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I have a string like this::

";abc: 123 ;234 ;345 ;def: 234 ;456 ;xyz: 123;"

I need to get back

abc def xyz

i.e which is in between ; and :

I am only able to get back abc..but not def and xyz.. I tried this::

C#

string abc = ";abc: 123 ;234 ;345 ;def: 234 ;456 ;xyz: 123;";
            
                int firstpos = abc.IndexOf(';');
                int secondpos = abc.IndexOf(':');

                string result = abc.Substring(firstpos + 1, secondpos - 1);

Posted 4-Aug-14 5:56am

JaideepChandra

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2 solutions

Solution 3

"I need to get back" simply means that you are using wrong approach: using strings representing data instead of data itself. You should pass everywhere your original data structure, not a string representing this data structure. Well, if you pass this structure between hosts, you may need to use serialization of the data, but in this case learn and use serialization (which can be string or binary).

—SA

Posted 4-Aug-14 6:32am

Sergey Alexandrovich Kryukov

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Richard Deeming · Accepted Answer · 2014-08-04T06:04:00

Solution 1

Try something like this:

C#

string abc = ";abc: 123 ;234 ;345 ;def: 234 ;456 ;xyz: 123;";

Regex pattern = new Regex(";(?<val>[^;:]+?):", RegexOptions.ExplicitCapture);

IEnumerable<string> values = pattern.Matches(abc).Cast<Match>().Select(m => m.Groups["val"].Value);

Posted 4-Aug-14 6:04am

Richard Deeming

Updated 4-Aug-14 6:05am

v2

Comments

JaideepChandra 4-Aug-14 12:31pm

Thank you so much..That works fine.

Sergey Alexandrovich Kryukov 4-Aug-14 13:26pm

This will work, of course, my 5, but the question suggests that the whole approach is wrong. Please see my answer.
—SA