program.cs

这是.net2005学习不可缺少的教程

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace RegexUsage
{
    class Program
    {
        static void Main(string[] args)
        {
            Regex regex = new Regex("ABC");
            
            // IsMatch()
            Console.WriteLine(regex.IsMatch("Abc"));
            Console.WriteLine(regex.IsMatch("tell me ABC"));
            Console.WriteLine(regex.IsMatch("tell me Abc"));
            Console.WriteLine(Regex.IsMatch("ABC", "Abc", RegexOptions.IgnoreCase));

            // Replace()
            String mString = "Two little black birds sitting in the tree";
            mString = Regex.Replace(mString, "in", "on");
            Console.WriteLine(mString);

            String stringNumber = "123,456,123,123,789,123,678";
             Regex regex2 = new Regex("123");
            stringNumber = regex2.Replace(stringNumber, "***", 2, 4);
            Console.WriteLine(stringNumber);

            // Split()
            String mStringMix = "123,ABC,456,DEF,789";
            String[] splitResults;
            splitResults = Regex.Split(mStringMix, ",");
            StringBuilder stringResults = new StringBuilder(32);

            foreach (String strEle in splitResults)
            {
                stringResults.Append(strEle + "\n");
            }
            Console.WriteLine(stringResults.ToString());

            // Match
            String intputString = "A sailor want to sea to sea, to see what he could see could see";
            Regex regex3 = new Regex("se");
            Match matchMade = regex3.Match(intputString, 0);
            while (matchMade.Success)
            {
                Console.WriteLine(matchMade.Value);
                matchMade = matchMade.NextMatch();
            }

            Console.WriteLine("*************");
            Regex regex4 = new Regex("se.");
           Match matchMade2 = regex4.Match(intputString, 0);
            while (matchMade2.Success)
            {
                Console.WriteLine(matchMade2.Value);
                matchMade2 = matchMade2.NextMatch();
            }

            // Matches
            Console.WriteLine("*********** Matches ***********");
            MatchCollection matches = Regex.Matches(intputString, "se.");
            if (matches.Count >= 3)
            {
                Console.WriteLine(matches[2].Value);
            }
        }
    }
}