getting a substring from a string after the 2nd occurrence of a particular character

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hello friends ,i want to get a substring from a string after the 2nd occurrence of a particular character.
for example
i have strings like this
sw-100-133
sw-100-300
sw-100-200
sw-1000-200
sw-10-200
now i want to get strings only having 'sw-100' or by starting by 'sw-100' exactly (not like sw-1000). how can i get it .
thanks in advance friends

Posted 16-Sep-12 19:32pm

pawanvats

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OriginalGriff · Answer 1 · 2012-09-16T20:36:00

Solution 1

Try:

C#

string s = "sw-100-133";
if (s.StartsWith("sw-100-"))
   {
   ...
   }

Or, you could use a regex:

C#

Regex myRegex = new Regex(@"sw\-\d\d\d[^\d].*");
if (myRegex.IsMatch((s))
   {
   ...
   }

The second solution is more flexible, but may be harder to maintain.

Posted 16-Sep-12 20:36pm

OriginalGriff

codeninja-C# · Answer 2 · 2012-09-16T21:31:00

Solution 2

Hi,
Try this:

C#

string input = "sw-100-133";
Match match1 = Regex.Match(input, @"sw-100-.*", RegexOptions.IgnoreCase);
if (match1.Success)
Console.WriteLine(match1.Value);

Thanks

Posted 16-Sep-12 21:31pm

codeninja-C#