I am trying to find {a number} / { a number } / {a string} patterns. I can get number / number to work, but when I add / string it does not.
Example of what I'm trying to find:
15/00969/FUL
My regex:
Regex reg = new Regex(@"\d/\d/\w");
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4 Answers
You should use + quantifier that means 1 or more times and it applies to the pattern preceding the quantifier, and I would add word boundaries \b to only match whole words:
\b\d+/\d+/\w+\b
C# code (using verbatim string literal so that we just could copy/paste regular expressions from testing tools or services without having to escape backslashes):
var rx = new Regex(@"\b\d+/\d+/\w+\b");
If you want to precise the number of characters corresponding to some pattern, you can use {}s:
\b\d{2}/\d{5}/\w{3}\b
And, finally, if you have only letters in the string, you can use \p{L} (or \p{Lu} to only capture uppercase letters) shorthand class in C#:
\b\d{2}/\d{5}/\p{L}{3}\b
Sample code (also featuring capturing groups introduced with unescaped ( and )):
var rx = new Regex(@"\b(\d{2})/(\d{5})/(\p{L}{3})\b");
var res = rx.Matches("15/00969/FUL").OfType<Match>()
.Select(p => new
{
first_number = p.Groups[1].Value,
second_number = p.Groups[2].Value,
the_string = p.Groups[3].Value
}).ToList();
Output:
Comments
Regex reg = new Regex(@"\d+/\d+/\w+");
Complete example:
Regex r = new Regex(@"(\d+)/(\d+)/(\w+)");
string input = "15/00969/FUL";
var m = r.Match(input);
if (m.Success)
{
string a = m.Groups[1].Value; // 15
string b = m.Groups[2].Value; // 00969
string c = m.Groups[3].Value; // FUL
}
1 Comment
Sayse
You should explain how this answers the question within your answer.
You are missing the quantifiers in your Regex
If you want to match 1 or more items you should use the +.
If you already know the number of items you need to match, you can specify it using {x} or {x,y} for a range (x and y being two numbers)
So your regex would become:
Regex reg = new Regex(@"\d/+\d+/\w+");
For example if all the elements you want to match have this format ({2 digit}/{5 digit}/{3 letters}), you could write:
Regex reg = new Regex(@"\d/{2}\d{5}/\w{3}");
And that would match 15/00969/FUL
More info on the Regular Expressions can be found here
Comments
bool match = new Regex(@"[\d]+[/][\d]+[/][\w]+").IsMatch("15/00969/FUL"); //true
Regular Expression:
[\d]+ //one or more digits
[\w]+ //one or more alphanumeric characters
[/] // '/'-character
