Csharp/C Sharp/Development Class/Matcher
Содержание
Define multiline patterns
<source lang="csharp"> using System; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"
- First part match
([01]?\d\d?
- OR
|2[0-4]\d
- OR
|25[0-5])
\.
- REPEAT
([01]?\d\d?|2[0-4]\d|25[0-5])\.
- REPEAT
([01]?\d\d?|2[0-4]\d|25[0-5])\.
- REPEAT
([01]?\d\d?|2[0-4]\d|25[0-5]) ";
Regex regex = new Regex( pattern,
RegexOptions.IgnorePatternWhitespace );
Match match = regex.Match( "192.168.169.1" );
while( match.Success ) {
Console.WriteLine( "IP Address found at {0} with " +
"value of {1}",
match.Index,
match.Value );
match = match.NextMatch();
}
}
}
</source>
Is Match successful
<source lang="csharp"> using System; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.168.169.1" );
while( match.Success ) {
Console.WriteLine( "IP Address found at {0} with " +
"value of {1}",
match.Index,
match.Value );
Console.WriteLine( "Groups are:" );
foreach( Group g in match.Groups ) {
Console.WriteLine( "\t{0} at {1}",
g.Value,
g.Index );
}
match = match.NextMatch();
}
}
}
</source>
MatchEvaluator: Entry Point IP Reverse
<source lang="csharp"> using System; using System.Text; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"(?<part1>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part2>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part3>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part4>[01]?\d\d?|2[0-4]\d|25[0-5])";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.168.169.1" );
MatchEvaluator eval = new MatchEvaluator(EntryPoint.IPReverse );
Console.WriteLine( regex.Replace("192.168.169.1", eval) );
}
static string IPReverse( Match match ) {
Console.WriteLine( match.Groups["part4"] + "." );
Console.WriteLine( match.Groups["part3"] + "." );
Console.WriteLine( match.Groups["part2"] + "." );
Console.WriteLine( match.Groups["part1"] );
return "";
}
}
</source>
Match Groups
<source lang="csharp"> using System; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"(?<part1>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part2>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part3>[01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"(?<part4>[01]?\d\d?|2[0-4]\d|25[0-5])";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.168.169.1" );
while( match.Success ) {
Console.WriteLine( "IP Address found at {0} with " +
"value of {1}",
match.Index,
match.Value );
Console.WriteLine( "Groups are:" );
Console.WriteLine( "\tPart 1: {0}",
match.Groups["part1"] );
Console.WriteLine( "\tPart 2: {0}",
match.Groups["part2"] );
Console.WriteLine( "\tPart 3: {0}",
match.Groups["part3"] );
Console.WriteLine( "\tPart 4: {0}",
match.Groups["part4"] );
match = match.NextMatch();
}
}
}
</source>
Match IP address pattern and print out the index
<source lang="csharp"> using System; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])\." +
@"([01]?\d\d?|2[0-4]\d|25[0-5])";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.169.168.1" );
while( match.Success ) {
Console.WriteLine( "IP Address found at {0} with " +
"value of {1}",
match.Index,
match.Value );
match = match.NextMatch();
}
}
}
</source>
Use regular to search an IP address
<source lang="csharp"> using System; using System.Text.RegularExpressions; public class EntryPoint {
static void Main( string[] args ) {
// Create regex to search for IP address pattern.
string pattern = @"\d\d?\d?\.\d\d?\d?\.\d\d?\d?\.\d\d?\d?";
Regex regex = new Regex( pattern );
Match match = regex.Match( "192.168.169.1" );
while( match.Success ) {
Console.WriteLine( "IP Address found at {0} with " +
"value of {1}",
match.Index,
match.Value );
match = match.NextMatch();
}
}
}
</source>
