C#常用于验证的正则表达式

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虽然不懂正则表达式,但是用起来真是很方便。虽然记不得那么表达式,但是把常用的封装起来,以后直接拿来用,还是相当不错的。
首先需要引用

using System.Text;using System.Text.RegularExpressions;

总结了下常用的表达式如下:

 public class Validate    {        private static Regex RegNumber = new Regex("^[0-9]+$");        private static Regex RegNumberSign = new Regex("^[+-]?[0-9]+$");        private static Regex RegDecimal = new Regex("^[0-9]+[.]?[0-9]+$");        private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等价于^[+-]?\d+[.]?\d+$        private static Regex RegEmail = new Regex(@"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$");//w 英文字母或数字的字符串,和 [a-zA-Z0-9] 语法一样         private static Regex RegCHZN = new Regex("[\u4e00-\u9fa5]");        #region 用户名密码格式        /// <summary>        /// 返回字符串真实长度, 1个汉字长度为2        /// </summary>        /// <returns>字符长度</returns>        public static int GetStringLength(string stringValue)        {            return Encoding.Default.GetBytes(stringValue).Length;        }        /// <summary>        /// 检测用户名格式是否有效        /// </summary>        /// <param name="userName"></param>        /// <returns></returns>        public static bool IsValidUserName(string userName)        {            int userNameLength = GetStringLength(userName);            if (userNameLength >= 4 && userNameLength <= 20 && Regex.IsMatch(userName, @"^([\u4e00-\u9fa5A-Za-z_0-9]{0,})$"))            {   // 判断用户名的长度(4-20个字符)及内容(只能是汉字、字母、下划线、数字)是否合法                return true;            }            else            {                return false;            }        }        /// <summary>        /// 密码有效性        /// </summary>        /// <param name="password"></param>        /// <returns></returns>        public static bool IsValidPassword(string password)        {            return Regex.IsMatch(password, @"^[A-Za-z_0-9]{6,16}$");        }        #endregion        #region 数字字符串检查        /// <summary>        /// int有效性        /// </summary>        /// <param name="val"></param>        /// <returns></returns>        static public bool IsValidInt(string val)        {            return Regex.IsMatch(val, @"^[1-9]\d*\.?[0]*$");        }        /// <summary>        /// 是否数字字符串        /// </summary>        /// <param name="inputData">输入字符串</param>        /// <returns></returns>        public static bool IsNumber(string inputData)        {            Match m = RegNumber.Match(inputData);            return m.Success;        }        /// <summary>        /// 是否数字字符串 可带正负号        /// </summary>        /// <param name="inputData">输入字符串</param>        /// <returns></returns>        public static bool IsNumberSign(string inputData)        {            Match m = RegNumberSign.Match(inputData);            return m.Success;        }        /// <summary>        /// 是否是浮点数        /// </summary>        /// <param name="inputData">输入字符串</param>        /// <returns></returns>        public static bool IsDecimal(string inputData)        {            Match m = RegDecimal.Match(inputData);            return m.Success;        }        /// <summary>        /// 是否是浮点数 可带正负号        /// </summary>        /// <param name="inputData">输入字符串</param>        /// <returns></returns>        public static bool IsDecimalSign(string inputData)        {            Match m = RegDecimalSign.Match(inputData);            return m.Success;        }        #endregion        #region 中文检测        /// <summary>        /// 检测是否有中文字符        /// </summary>        /// <param name="inputData"></param>        /// <returns></returns>        public static bool IsHasCHZN(string inputData)        {            Match m = RegCHZN.Match(inputData);            return m.Success;        }        /// <summary>         /// 检测含有中文字符串的实际长度         /// </summary>         /// <param name="str">字符串</param>         public static int GetCHZNLength(string inputData)        {            System.Text.ASCIIEncoding n = new System.Text.ASCIIEncoding();            byte[] bytes = n.GetBytes(inputData);            int length = 0; // l 为字符串之实际长度             for (int i = 0; i <= bytes.Length - 1; i++)            {                if (bytes[i] == 63) //判断是否为汉字或全脚符号                 {                    length++;                }                length++;            }            return length;        }        #endregion        #region 常用格式        /// <summary>        /// 验证身份证是否合法  15 和  18位两种        /// </summary>        /// <param name="idCard">要验证的身份证</param>        public static bool IsIdCard(string idCard)        {            if (string.IsNullOrEmpty(idCard))            {                return false;            }            if (idCard.Length == 15)            {                return Regex.IsMatch(idCard, @"^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$");            }            else if (idCard.Length == 18)            {                return Regex.IsMatch(idCard, @"^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])((\d{4})|\d{3}[A-Z])$", RegexOptions.IgnoreCase);            }            else            {                return false;            }        }        /// <summary>        /// 是否是邮件地址        /// </summary>        /// <param name="inputData">输入字符串</param>        /// <returns></returns>        public static bool IsEmail(string inputData)        {            Match m = RegEmail.Match(inputData);            return m.Success;        }        /// <summary>        /// 邮编有效性        /// </summary>        /// <param name="zip"></param>        /// <returns></returns>        public static bool IsValidZip(string zip)        {            Regex rx = new Regex(@"^\d{6}$", RegexOptions.None);            Match m = rx.Match(zip);            return m.Success;        }        /// <summary>        /// 固定电话有效性        /// </summary>        /// <param name="phone"></param>        /// <returns></returns>        public static bool IsValidPhone(string phone)        {            Regex rx = new Regex(@"^(\(\d{3,4}\)|\d{3,4}-)?\d{7,8}$", RegexOptions.None);            Match m = rx.Match(phone);            return m.Success;        }        /// <summary>        /// 手机有效性        /// </summary>        /// <param name="strMobile"></param>        /// <returns></returns>        public static bool IsValidMobile(string mobile)        {            Regex rx = new Regex(@"^(13|15|17|18|19)\d{9}$", RegexOptions.None);            Match m = rx.Match(mobile);            return m.Success;        }        /// <summary>        /// 电话有效性(固话和手机 )        /// </summary>        /// <param name="strVla"></param>        /// <returns></returns>        public static bool IsValidPhoneAndMobile(string number)        {            Regex rx = new Regex(@"^(\(\d{3,4}\)|\d{3,4}-)?\d{7,8}$|^(13|15)\d{9}$", RegexOptions.None);            Match m = rx.Match(number);            return m.Success;        }        /// <summary>        /// Url有效性        /// </summary>        /// <param name="url"></param>        /// <returns></returns>        static public bool IsValidURL(string url)        {            return Regex.IsMatch(url, @"^(http|https|ftp)\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(:[a-zA-Z0-9]*)?/?([a-zA-Z0-9\-\._\?\,\'/\\\+&%\$#\=~])*[^\.\,\)\(\s]$");        }        /// <summary>        /// IP有效性        /// </summary>        /// <param name="ip"></param>        /// <returns></returns>        public static bool IsValidIP(string ip)        {            return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");        }        /// <summary>        /// domain 有效性        /// </summary>        /// <param name="host">域名</param>        /// <returns></returns>        public static bool IsValidDomain(string host)        {            Regex r = new Regex(@"^\d+$");            if (host.IndexOf(".") == -1)            {                return false;            }            return r.IsMatch(host.Replace(".", string.Empty)) ? false : true;        }        /// <summary>        /// 判断是否为base64字符串        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static bool IsBase64String(string str)        {            return Regex.IsMatch(str, @"[A-Za-z0-9\+\/\=]");        }        /// <summary>        /// 验证字符串是否是GUID        /// </summary>        /// <param name="guid">字符串</param>        /// <returns></returns>        public static bool IsGuid(string guid)        {            if (string.IsNullOrEmpty(guid))                return false;            return Regex.IsMatch(guid, "[A-F0-9]{8}(-[A-F0-9]{4}){3}-[A-F0-9]{12}|[A-F0-9]{32}", RegexOptions.IgnoreCase);        }        #endregion        #region 日期检查        /// <summary>        /// 判断输入的字符是否为日期        /// </summary>        /// <param name="strValue"></param>        /// <returns></returns>        public static bool IsDate(string strValue)        {            return Regex.IsMatch(strValue, @"^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))");        }        /// <summary>        /// 判断输入的字符是否为日期,如2004-07-12 14:25|||1900-01-01 00:00|||9999-12-31 23:59        /// </summary>        /// <param name="strValue"></param>        /// <returns></returns>        public static bool IsDateHourMinute(string strValue)        {            return Regex.IsMatch(strValue, @"^(19[0-9]{2}|[2-9][0-9]{3})-((0(1|3|5|7|8)|10|12)-(0[1-9]|1[0-9]|2[0-9]|3[0-1])|(0(4|6|9)|11)-(0[1-9]|1[0-9]|2[0-9]|30)|(02)-(0[1-9]|1[0-9]|2[0-9]))\x20(0[0-9]|1[0-9]|2[0-3])(:[0-5][0-9]){1}$");        }        #endregion        #region 其他        /// <summary>        /// 检查字符串最大长度,返回指定长度的串        /// </summary>        /// <param name="sqlInput">输入字符串</param>        /// <param name="maxLength">最大长度</param>        /// <returns></returns>                 public static string CheckMathLength(string inputData, int maxLength)        {            if (inputData != null && inputData != string.Empty)            {                inputData = inputData.Trim();                if (inputData.Length > maxLength)//按最大长度截取字符串                {                    inputData = inputData.Substring(0, maxLength);                }            }            return inputData;        }        /// <summary>        /// 转换成 HTML code        /// </summary>        /// <param name="str">string</param>        /// <returns>string</returns>        public static string Encode(string str)        {            str = str.Replace("&", "&amp;");            str = str.Replace("'", "''");            str = str.Replace("\"", "&quot;");            str = str.Replace(" ", "&nbsp;");            str = str.Replace("<", "&lt;");            str = str.Replace(">", "&gt;");            str = str.Replace("\n", "<br>");            return str;        }        /// <summary>        ///解析html成 普通文本        /// </summary>        /// <param name="str">string</param>        /// <returns>string</returns>        public static string Decode(string str)        {            str = str.Replace("<br>", "\n");            str = str.Replace("&gt;", ">");            str = str.Replace("&lt;", "<");            str = str.Replace("&nbsp;", " ");            str = str.Replace("&quot;", "\"");            return str;        }        #endregion    }
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