CODEWITHSUNDEEP
c#regexstringsearch
GKG4
GKG4

Reputation: 501

Search string using Pattern within long string in C#

I need to search for a pattern within a string. For eg: 

string big = "Hello there, I need information for ticket XYZ12345. I also submitted ticket ZYX54321. Please update.";

Now I need to extract/find/seek words based on the pattern XXX00000 i.e. 3 ALPHA and than 5 numeric.

Is there any way to do this ?

Even extraction will be okay for me.

Please help.

Upvotes: 0

Views: 265

Answers (6)

fejesjoco
fejesjoco

Reputation: 11903

Here's a regex:

var str = "ABCD12345 ABC123456 ABC12345 XYZ98765";
foreach (Match m in Regex.Matches(str, @"(?<![A-Z])[A-Z]{3}[0-9]{5}(?![0-9])"))
    Console.WriteLine(m.Value);

The extra bits are the zero-width negative look-behind ((?<![A-Z])) and look-ahead ((?![0-9])) expressions to make sure you don't capture extra numbers or letters. The above example only catches the third and fourth parts, but not the first and second. A simple [A-Z]{3}[0-9]{5} catches at least the specified number of characters, or more.

Upvotes: 0

Nyx
Nyx

Reputation: 425

Use a regex:

string ticketNumber = string.Empty;
var match = Regex.Match(myString,@"[A-Za-z]{3}\d{5}");

if(match.Success)
{
    ticketNumber = match.Value;
}

Upvotes: 0

Theodor Solbj&#248;rg
Theodor Solbj&#248;rg

Reputation: 756

You could always use a chatbot extension for the requests.

as for extracting the required information out of a sentence without any context you can use regex for that.

you can use http://rubular.com/ to test it, an example would be

...[0-9]

that would find XXX00000

hope that helped.

Upvotes: 0

Denis
Denis

Reputation: 3757

foreach (Match m in Regex.Matches(big, "([A-Za-z]{3}[0-9]{5})"))
{
    if (m.Success)
    {
        m.Groups[1].Value // -- here is your match
    }
}

Upvotes: 3

Piotr Stapp
Piotr Stapp

Reputation: 19820

You can use simple regular expression to match your following string

([A-Za-z]{3}[0-9]{5})

the full code will be:

string strRegex = @"([A-Za-z]{3}[0-9]{5})";
Regex myRegex = new Regex(strRegex, RegexOptions.IgnoreCase);
string strTargetString = @"Hello there, I need information for ticket XYZ12345. I also submitted ticket ZYX54321. Please update.";

foreach (Match myMatch in myRegex.Matches(strTargetString))
{
  if (myMatch.Success)
  {
    // Add your code here
  }
}

Upvotes: 0

Nickon
Nickon

Reputation: 10156

How about this one?

([XYZ]{3}[0-9]{5})

You can use Regex Tester to test your expressions.

Upvotes: 0

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