详解C#正则表达式Regex常用匹配

var source = "刘备关羽张飞孙权何问起";//Regex regex = new Regex("孙权");//if (regex.IsMatch(source))//{// Console.WriteLine("字符串中包含有敏感词:孙权！");//}if (Regex.IsMatch(source, "孙权")) {　　Console.WriteLine("字符串中包含有敏感词:孙权！");}Console.ReadLine();

var source = "123abc345DEf";Regex regex = new Regex("def",RegexOptions.IgnoreCase);if (regex.IsMatch(source)){　　Console.WriteLine("字符串中包含有敏感词:def！");} Console.ReadLine();

var source = "123abc456ABC789";// 静态方法//var newSource=Regex.Replace(source,"abc","|",RegexOptions.IgnoreCase);// 实例方法Regex regex = new Regex("abc", RegexOptions.IgnoreCase);var newSource = regex.Replace(source, "|");Console.WriteLine("原字符串："+source);Console.WriteLine("替换后的字符串：" + newSource);Console.ReadLine();

var source = "123abc456ABCD789"; Regex regex = new Regex("[A-Z]{3}", RegexOptions.IgnoreCase);var newSource = regex.Replace(source,new MatchEvaluator(OutPutMatch));Console.WriteLine("原字符串："+source);Console.WriteLine("替换后的字符串：" + newSource);Console.ReadLine(); //柔城private static string OutPutMatch(Match match){　　return "<b>" +match.Value+ "</b>";}

#region 身份证号码正则表达式      //何问起              Console.WriteLine("请输入一个身份证号码");        string id = Console.ReadLine();        bool b4 = Regex.IsMatch(id, @"^/d{15}|/d{18}$");        bool b5 = Regex.IsMatch(id, @"^(/d{15}|/d{18})$");        Console.WriteLine(b4);        Console.WriteLine(b5);            #endregion      #region 匹配电话号码      //hovertree              Console.WriteLine("请输入电话号码");        string phone = Console.ReadLine();        bool b = Regex.IsMatch(phone, @"^((/d{3,4}/-/d?{7,8})|(/d{5}))$");        Console.WriteLine(b);            #endregion      #region 匹配email的regex      //hovertree              Console.WriteLine("请输入Email地址");        string email = Console.ReadLine();        bool bhvt = Regex.IsMatch(email, @"^/w+@/w+/./w+$");        Console.WriteLine(bhvt);            #endregion      #region 匹配ip地址的regex      //hovertree              Console.WriteLine("请输入一个IP地址");        string ip = Console.ReadLine();        bool bkly = Regex.IsMatch(ip, @"^/d{1,3}(/./d{1,3}){3}$");        Console.WriteLine(bkly);            #endregion      #region 匹配日期合法regex      //何问起              Console.WriteLine("请输入一个日期");        string date = Console.ReadLine();        bool bhovertree = Regex.IsMatch(date, @"^/d{4}/-/d{1,2}/-/d{1,2}$");        Console.WriteLine(bhovertree);            #endregion      #region 匹配url地址的regex      //"http://hovertree.com"      //"http://keleyi.com/a/bjae/h1o76nuh.htm?id=3&name=aaa"      //"https://s.taobao.com/search?q=hover+tree&js=1&stats_click=search_radio_all%3A1&initiative_id=staobaoz_20151204&ie=utf8"      //"ftp://127.0.0.1/myslider.txt"      //hovertree              Console.WriteLine("请输入url地址");        string url = Console.ReadLine();        bool bkeleyi = Regex.IsMatch(url, @"^[a-zA-Z]+://.+$");        Console.WriteLine(bkeleyi);            #endregion