C#正则表达式
正则表达式很好用但是不好记，为方便以后查询做个记录
public static class ValidatorHelper { #region 验证输入字符串为数字(带小数) /// <summary> /// 验证输入字符串为带小数点正数 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsNumber(this string str) { return Regex.IsMatch(str, "^([0]|([1-9]+\\d{0,}?))(.[\\d]+)?$"); } /// <summary> /// 验证输入字符串为带小数点正负数 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsNumberic(this string str) { return Regex.IsMatch(str, "^-?\\d+$|^(-?\\d+)(\\.\\d+)?$"); } #endregion #region 验证中国电话格式是否有效，格式010-85849685 /// <summary> /// 验证中国电话格式是否有效，格式010-85849685 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsTel(this string str) { return Regex.IsMatch(str, @"^(0[0-9]{2,3}\-)?([2-9][0-9]{6,7})+(\-[0-9]{1,4})?$", RegexOptions.IgnoreCase); } #endregion #region 验证输入字符串为电话号码 /// <summary> /// 验证输入字符串为电话号码 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsPhone(this string str) { return Regex.IsMatch(str, @"(^(\d{2,4}[-_－—]?)?\d{3,8}([-_－—]?\d{3,8})?([-_－—]?\d{1,7})?$)|(^0?1[35]\d{9}$)"); //弱一点的验证： @"\d{3,4}-\d{7,8}" } #endregion #region 验证是否是有效传真号码 /// <summary> /// 验证是否是有效传真号码 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsFax(this string str) { return Regex.IsMatch(str, @"^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$"); } #endregion #region 验证手机号是否合法 /// <summary> /// 验证手机号是否合法 号段为13,14,15,16,17,18,19 0，86开头将自动识别 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsMobile(this string str) { if (!str.StartsWith("1")) { str = str.TrimStart(new char[] { '8', '6', }).TrimStart('0'); } return Regex.IsMatch(str, @"^(13|14|15|16|17|18|19)\d{9}$"); } #endregion #region 验证身份证是否有效 /// <summary> /// 验证身份证是否有效 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsIDCard(this string str) { switch (str.Length) { case 18: { return str.IsIDCard18(); } case 15: { return str.IsIDCard15(); } default: return false; } } /// <summary> /// 验证输入字符串为18位的身份证号码 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsIDCard18(this string str) { long n = 0; if (long.TryParse(str.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(str.Replace('x', '0').Replace('X', '0'), out n) == false) { return false;//数字验证 } const string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91"; if (address.IndexOf(str.Remove(2), StringComparison.Ordinal) == -1) { return false;//省份验证 } string birth = str.Substring(6, 8).Insert(6, "-").Insert(4, "-"); DateTime time; if (DateTime.TryParse(birth, out time) == false) { return false;//生日验证 } string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(','); string[] wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(','); char[] ai = str.Remove(17).ToCharArray(); int sum = 0; for (int i = 0; i < 17; i++) { sum += int.Parse(wi[i]) * int.Parse(ai[i].ToString()); } int y = -1; Math.DivRem(sum, 11, out y); return arrVarifyCode[y] == str.Substring(17, 1).ToLower(); } /// <summary> /// 验证输入字符串为15位的身份证号码 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsIDCard15(this string str) { long n = 0; if (long.TryParse(str, out n) == false || n < Math.Pow(10, 14)) { return false;//数字验证 } const string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91"; if (address.IndexOf(str.Remove(2), StringComparison.Ordinal) == -1) { return false;//省份验证 } string birth = str.Substring(6, 6).Insert(4, "-").Insert(2, "-"); DateTime time; return DateTime.TryParse(birth, out time) != false; } #endregion #region 验证是否是有效邮箱地址 /// <summary> /// 验证是否是有效邮箱地址 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsEmail(this string str) { return Regex.IsMatch(str, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"); } #endregion #region 验证是否只含有汉字 /// <summary> /// 验证是否只含有汉字 /// </summary> /// <param name="strln">输入字符</param> /// <returns></returns> public static bool IsOnlyChinese(this string strln) { return Regex.IsMatch(strln, @"^[\u4e00-\u9fa5]+$"); } #endregion #region 是否有多余的字符 防止SQL注入 /// <summary> /// 是否有多余的字符 防止SQL注入 /// </summary> /// <param name="str">输入字符</param> /// <returns></returns> public static bool IsBadString(this string str) { if (string.IsNullOrEmpty(str)) return false; //列举一些特殊字符串 const string badChars = "@,*,#,$,!,+,',=,--,%,^,&,?,(,), <,>,[,],{,},/,\\,;,:,\",\"\",delete,update,drop,alert,select"; var arraryBadChar = badChars.Split(','); return arraryBadChar.Any(t => !str.Contains(t)); } #endregion #region 是否由数字、26个英文字母或者下划线組成的字串 /// <summary> /// 是否由数字、26个英文字母或者下划线組成的字串 /// </summary> /// <param name="str">输入字符</param> /// <returns></returns> public static bool IsNzx(this string str) { return Regex.Match(str, "^[0-9a-zA-Z_]+$").Success; } #endregion #region 由数字、26个英文字母、汉字組成的字串 /// <summary> /// 由数字、26个英文字母、汉字組成的字串 /// </summary> /// <param name="str">输入字符</param> /// <returns></returns> public static bool IsSzzmChinese(this string str) { return Regex.Match(str, @"^[0-9a-zA-Z\u4e00-\u9fa5]+$").Success; } #endregion #region 由数字、26个英文字母組成的字串 /// <summary> /// 是否由数字、26个英文字母組成的字串 /// </summary> /// <param name="str">输入字符</param> /// <returns></returns> public static bool IsSzzm(this string str) { return Regex.Match(str, @"^[0-9a-zA-Z]+$").Success; } #endregion #region 验证输入字符串为邮政编码 /// <summary> /// 验证输入字符串为邮政编码 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> public static bool IsPostCode(this string str) { return Regex.IsMatch(str, @"\d{6}"); } #endregion #region 检查对象的输入长度 /// <summary> /// 检查对象的输入长度 /// </summary> /// <param name="str">输入字符</param> /// <param name="length">指定的长度</param> /// <returns>false 太长，true -太短</returns> public static bool CheckLength(this string str, int length) { if (str.Length > length) { return false;//长度太长 } return str.Length >= length; } #endregion #region 判断用户输入是否为日期 /// <summary> /// 判断用户输入是否为日期 /// </summary> /// <param name="str">输入字符</param> /// <returns>返回一个bool类型的值</returns> /// <remarks> /// 可判断格式如下（其中-可替换为/，不影响验证) /// YYYY | YYYY-MM | YYYY-MM-DD | YYYY-MM-DD HH:MM:SS | YYYY-MM-DD HH:MM:SS.FFF /// </remarks> public static bool IsDateTime(this string str) { if (null == str) { return false; } const string regexDate = @"[1-2]{1}[0-9]{3}((-|\/|\.){1}(([0]?[1-9]{1})|(1[0-2]{1}))((-|\/|\.){1}((([0]?[1-9]{1})|([1-2]{1}[0-9]{1})|(3[0-1]{1})))( (([0-1]{1}[0-9]{1})|2[0-3]{1}):([0-5]{1}[0-9]{1}):([0-5]{1}[0-9]{1})(\.[0-9]{3})?)?)?)?$"; if (Regex.IsMatch(str, regexDate)) { //以下各月份日期验证，保证验证的完整性 int indexY = -1; int indexM = -1; int indexD = -1; if (-1 != (indexY = str.IndexOf("-", StringComparison.Ordinal))) { indexM = str.IndexOf("-", indexY + 1, StringComparison.Ordinal); indexD = str.IndexOf(":", StringComparison.Ordinal); } else { indexY = str.IndexOf("/", StringComparison.Ordinal); indexM = str.IndexOf("/", indexY + 1, StringComparison.Ordinal); indexD = str.IndexOf(":", StringComparison.Ordinal); } //不包含日期部分，直接返回true if (-1 == indexM) return true; if (-1 == indexD) { indexD = str.Length + 3; } int iYear = Convert.ToInt32(str.Substring(0, indexY)); int iMonth = Convert.ToInt32(str.Substring(indexY + 1, indexM - indexY - 1)); int iDate = Convert.ToInt32(str.Substring(indexM + 1, indexD - indexM - 4)); //判断月份日期 if ((iMonth < 8 && 1 == iMonth % 2) || (iMonth > 8 && 0 == iMonth % 2)) { if (iDate < 32) return true; } else { if (iMonth != 2) { if (iDate < 31) return true; } else { //闰年 if ((0 == iYear % 400) || (0 == iYear % 4 && 0 < iYear % 100)) { if (iDate < 30) return true; } else { if (iDate < 29) return true; } } } } return false; } #endregion }
