C # uses regular expression to match string validation URL example

In the System.Text.RegularExpression namespace, there is a regular expression method.

Using System.Collections.Generic;

Using System.Text;
Using System.Text.RegularExpressions;

Namespace Regexdemo
{
Class Program
{
static void Main (string[] args)
{
Regex regex = new Regex ("China", regexoptions.ignorecase);
Use the match method.
String Source = "Mother,my mother is china!";
Match m = regex. Match (source);
if (m.success)
{
Console.WriteLine ("Find first match");
}
Console.WriteLine (New String ('-', 9));
The following example shows a match using the matches method
MatchCollection Matches=regex. Matches (source);
foreach (Match s in matches)
{
if (s.success)
Console.WriteLine ("Found a Match");
}
Console.ReadLine ();
}
}
}
[/code]

Using system.collections.generic;using system.text;using system.text.regularexpressions;namespace URLRegex{    Class program    {        static void Main (string[] args)        {            string Pattern = @ "^ (http|https|ftp) \://[a-za-z0-9\ -\.] +\. [A-za-z] {2,3} (: [a-za-z0-9]*)?/? ([a-za-z0-9\-\._\?\,\ '/\\\+&$%\$#\=~]) *$ ";            Regex r = new Regex (Pattern);            String Source = "Http://www.jb51.net";            Match m = r.match (source);            if (m.success)            {                Console.WriteLine ("URL verified successfully!");            }            else            {                Console.WriteLine ("URL validation failed!");            }            Console.ReadLine ();}}}