using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^ # Start of line
(?! # Start of the alternation group
(?=.*\d)(?=.*[a-z])(?=.*[A-Z]) # Conditions 1, 2, 3
|
(?=.*\d)(?=.*[a-z])(?=.*[!@#$%^&*()_+]) # Conditions 1, 2, 4
|
(?=.*\d)(?=.*[A-Z])(?=.*[!@#$%^&*()_+]) # Conditions 1, 3, 4
|
(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#$%^&*()_+]) # Conditions 2, 3, 4
|
(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#$%^&*()_+]) # Conditions 1, 3, 4
)
.* # The line itself is matched
$ # Up to the end of line";
string input = @"12345678
adfghj
AASDFGHJ
!@#$%^&
1234as
1234ASDF
1345!#$%
asdfg!@#$
ASDFGB!#$$
SSRasd
Goodone123
G00done!@#
1@a
Aa1
must have 3 of 4:
Contain Numbers
Contain a-z
Contain A-Z
contain special characters !@#$%^&*()_+
";
RegexOptions options = RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline;
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