常用正则表达判别式

    //验证电话号码
        public bool IsTelephone(string str_telephone)
        {
            return System.Text.RegularExpressions.
            Regex.IsMatch(str_telephone, @"^(\d{3,4}-)?\d{6,8}$");
        }
        //验证密码
        public bool IsPassword(string str_password)
        {
            return System.Text.RegularExpressions.
            Regex.IsMatch(str_password, @"[A-Za-z]+[0-9]");
        }
        //验证邮政编码
        public bool IsPostalcode(string str_postalcode)
        {
            return System.Text.RegularExpressions.
            Regex.IsMatch(str_postalcode, @"^\d{6}$");
        }
        //验证手机号码
        public bool IsHandset(string str_handset)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_handset, @"^[1][3-5]\d{9}$");
        }
        //验证身份证
        public bool IsIDcard(string str_idcard)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_idcard, @"(^\d{18}$)|(^\d{15}$)");
        }
        //验证小数格式
        public bool IsDecimal(string str_decimal)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_decimal, @"^[0-9]+\.[0-9]{2}$");
        }
        //验证月份
        public bool IsMonth(string str_Month)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_Month, @"^(0?[[1-9]|1[0-2])$");
        }
        //验证天数
        public bool IsDay(string str_day)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_day, @"^((0?[1-9])|((1|2)[0-9])|30|31)$");
        }
        //验证是否为数字
        public bool IsNumber(string str_number)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_number, @"^[0-9]*$");
        }
        //验证密码长度
        public bool IsPasswLength(string str_Length)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_Length, @"^\d{6,18}$");
        }
        //验证正整数
        public bool IsIntNumber(string str_intNumber)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_intNumber, @"^\+?[1-9][0-9]*$");
        }
        //验证大小写
        public bool IsUpChar(string str_UpChar)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_UpChar, @"^[A-Z]+$");
        }
        public bool IsLowerChar(string str_UpChar)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_UpChar, @"^[a-z]+$");
        }
        //验证是否为字母
        public bool IsLetter(string str_Letter)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_Letter, @"^[A-Za-z]+$");
        }
        //验证是否为中文
        public bool IsChinese(string str_chinese)
        {
            return System.Text.RegularExpressions.Regex.
            IsMatch(str_chinese, @"^[\u4e00-\u9fa5]{1,}$");
        }
        //验证邮箱
        public bool IsEmail(string str_Email)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(str_Email,
            @"^(([\w\.]+)@(([[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))|((\w+\.?)+)@([a-zA-Z]{2,4}|[0-9]{1,3})(\.[a-zA-Z]{2,4}))$");
        }
        //验证IP
        public bool IPCheck(string IP)
        {
            string num = @"(25[0-5]|2[0-4]\d|[0-1]\d{2}|[1-9]?\d)";
            return Regex.IsMatch(IP,
            ("^" + num + "\\." + num + "\\." + num + "\\." + num + "$"));
        }
        //验证Url
        public bool IsUrl(string str_url)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(str_url,
            @"http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?");
        }