using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^ # begin
\s*# some empty spaces
(?:
\+? # + symbol
\d{1,2} # country code
\s*
(?(?=\)) # if followed by parens
| # then dash not allowed
-? # else optional dash
)
)? #prefix like +380
\s*
(?:
(?P<leftparen>\()? # optional left paren
\s*
0\d\d
\s*
(?(leftparen)\)|) # right paren if and only if left paren
)? # operator code, starting with 0, optinally in parentheses
(?(?<=\)) # if preceded by parens
\s*| # then dash not allowed
\s*-?\s* # else optional dash
)
(?:
\d |
(?<=
\d
)
(?(sep)
(?P=sep)|
(?P<sep>[\-\/\ ])
)
(?=
\d
)
){5,13}
\s*# some empty spaces
$ # end
#\d\d\d (?P<separator>-?) \d\d (?P=separator) \d\d $";
string input = @"SHOULD MATCH:
5344654
5344654
534-46-54
17189280121
+19173010176
(095)789-58-75
(095) 789-58-75
0957895875
917 229 2897
+38 (095) 5344654
53-475-34
555-1-333
1-333-484
888-333-4
(094)999-22-44
38-095-432-43-34
095-432-43-34
123456
53465
SHOULD NOT MATCH:
1
-1234
38-(095)-432-43-34
534-46/54
(094)999/22-44
1234--567
(345)5345654
(0955344654
095)5345654
";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx