using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"#IPv4
(?<IPv4>
(?!0+\.)
(?<byte>2(?:[0-4]\d|5[0-5])|1?\d{1,2})
(?:\.(?&byte)){3}
)
#IPv6 from http://vernon.mauery.com/content/projects/linux/ipv6_regex
| (?<smb>[0-9a-f]{1,4}:){1,1} (?<sme>:[0-9a-f]{1,4}){1,6}
| (?&smb){1,2} (?&sme){1,5}
| (?&smb){1,3} (?&sme){1,4}
| (?&smb){1,4} (?&sme){1,3}
| (?&smb){1,5} (?&sme){1,2}
| (?&smb){1,6} (?&sme){1,1}
| ((?&smb){1,7}|:):
| :(?&sme){1,7}
| (?&smb){6} (?&IPv4)
| (?&smb){5} :?+ [0-9a-f]{1,4} :(?&IPv4)
| (?&smb){1,1} (?&sme){1,4} :(?&IPv4)
| (?&smb){1,2} (?&sme){1,3} :(?&IPv4)
| (?&smb){1,3} (?&sme){1,2} :(?&IPv4)
| (?&smb){1,4} (?&sme){1,1} :(?&IPv4)
| ((?&smb){1,5}|:) :(?&IPv4)
| :(?&sme){1,5} :(?&IPv4)
";
string input = @"Valid
192.168.1.1
192.168.255.255
Invalid
0.0.0.0
0.0.0.1
0.0.0.255
1.0.0.255
";
RegexOptions options = RegexOptions.Singleline | 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