分享一个正则表达式帮助C#类
using System.Globalization; using System.Text.RegularExpressions; /// <summary> /// 正则表达式帮助类 /// </summary> public sealed class RegexHelper { private RegexHelper() { } /// <summary> /// 清除包含'字符串 /// </summary> public const string CLEAN_STRING = @"[']"; /// <summary> /// 验证字符串是否为字符begin-end之间 /// </summary> public const string IS_VALID_BYTE = @"^[A-Za-z0-9]{#0#,#1#}$"; /// <summary> /// 验证字符串是否为年月日 /// </summary> public const string IS_VALID_DATE = @"^2\d{3}-(?:0?[1-9]|1[0-2])-(?:0?[1-9]|[1-2]\d|3[0-1])(?:0?[1-9]|1\d|2[0-3]):(?:0?[1-9]|[1-5]\d):(?:0?[1-9]|[1-5]\d)$"; /// <summary> /// 验证字符串是否为小数 /// </summary> public const string IS_VALID_DECIMAL = @"[0].\d{1,2}|[1]"; /// <summary> /// 验证字符串是否为EMAIL /// </summary> public const string IS_VALID_EMAIL = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"; /// <summary> /// 验证字符串是否为IP /// </summary> public const string IS_VALID_IP = @"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$"; /// <summary> /// 验证字符串是否为后缀名 /// </summary> public const string IS_VALID_POSTFIX = @"\.(?i:{0})$"; /// <summary> /// 验证字符串是否为电话号码 /// </summary> public const string IS_VALID_TEL = @"(\d+-)?(\d{4}-?\d{7}|\d{3}-?\d{8}|^\d{7,8})(-\d+)?"; /// <summary> /// 验证字符串是否为URL /// </summary> public const string IS_VALID_URL = @"^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$"; #region 替换字符串 /// <summary> /// 替换字符串 /// </summary> /// <param name="input">输入字符串</param> /// <param name="regex">正则表达式</param> /// <returns>替换后字符串</returns> public static string ReplaceInput(string input, string regex) { return Regex.Replace(input, regex, string.Empty); } /// <summary> /// 替换字符串 /// </summary> /// <param name="input">输入字符串</param> /// <param name="regex">正则表达式</param> /// <param name="replace">替换字符串</param> /// <returns>替换后字符串</returns> public static string ReplaceInput(string input, string regex, string replace) { return Regex.Replace(input, regex, replace); } #endregion #region 验证字符串 /// <summary> /// 验证字符串 /// </summary> /// <param name="input">输入字符串</param> /// <param name="regex">正则表达式</param> /// <returns>是否验证通过</returns> public static bool CheckInput(string input, string regex) { return Regex.IsMatch(input, regex); } #endregion #region 常用方法 /// <summary> /// 验证字符串 /// </summary> /// <param name="input">输入字符串</param> /// <param name="regex">正则表达式</param> /// <param name="begin">开始数字</param> /// <param name="end">结尾数字</param> /// <returns>是否验证通过</returns> public static bool ValidByte(string input, string regex, int begin, int end) { bool ret = false; if (!string.IsNullOrEmpty(regex)) { string rep = regex.Replace("#0#", begin.ToString(CultureInfo.InvariantCulture)); rep = rep.Replace("#1#", end.ToString(CultureInfo.InvariantCulture)); ret = CheckInput(input, rep); } return ret; } /// <summary> /// 验证字符串 /// </summary> /// <param name="input">输入字符串</param> /// <param name="regex">正则表达式</param> /// <param name="fix">后缀名</param> /// <returns>是否验证通过</returns> public static bool ValidPostfix(string input, string regex, string fix) { string ret = string.Format(CultureInfo.InvariantCulture, regex, fix); return CheckInput(input, ret); } #endregion }
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