C#中的一些正则 验证Email地址,验证是否为小数,验证是否为电话号码,验证图片后缀名,验证IP,验证手机

        /// <summary>
        /// 验证Email地址
      /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsValidEmail(string strIn)
        {
            // Return true if strIn is in valid e-mail format.
            //return Regex.IsMatch(strIn, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
            return Regex.IsMatch(strIn, @"^(([0-9a-zA-Z]+)|([0-9a-zA-Z]+[_.0-9a-zA-Z-]*[0-9a-zA-Z]+))@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2}|net|NET|com|COM|gov|GOV|mil|MIL|org|ORG|edu|EDU|int|INT)$", RegexOptions.IgnoreCase);
        }

/// <summary>
        /// 验证是否为小数
        /// [0].\d{1,2}|[1]
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsValidDecimal(string strIn)
        {

            return Regex.IsMatch(strIn, @"[0].\d{1,2}|[1]");
        }

/// <summary>
        /// 验证是否为电话号码
        /// (\d+-)?(\d{4}-?\d{7}|\d{3}-?\d{8}|^\d{7,8})(-\d+)?
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsValidTel(string strIn)
        {
            return Regex.IsMatch(strIn, @"(\d+-)?(\d{4}-?\d{7}|\d{3}-?\d{8}|^\d{7,8})(-\d+)?");
        }

// <summary>
        /// Checks whether or not a date is a valid date.
        /// </summary>
        /// <param name="date"></param>
        /// <returns></returns>
        public static bool IsDate(string sdate)
        {
            DateTime dt;
            bool isDate = true;
            try
            {
                dt = DateTime.Parse(sdate);
            }
            catch
            {
                isDate = false;
            }
            return isDate;
        }

/// <summary>
        /// 验证图片后缀名(gif,jpg,bmp,png)
        /// \.(?i:gif|jpg|bmp|png)$
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsValidImgfix(string strIn)
        {
            return Regex.IsMatch(strIn, @"\.(?i:gif|jpg|bmp|png)$", RegexOptions.IgnoreCase);
        }

/// <summary>
        /// 验证字符是否在6至20之间字母、数字、下划线
        /// ^[a-zA-Z][a-zA-Z0-9_]{4,18}[a-zA-Z0-9]$
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsUserName(string strIn)
        {
            return Regex.IsMatch(strIn, @"^[a-zA-Z][a-zA-Z0-9_]{4,18}[a-zA-Z0-9]$");
        }

/// <summary>
        /// 验证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>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsValidIp(string strIn)
        {
            return Regex.IsMatch(strIn, @"^(\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>
        /// 验证手机
        /// ^((0)?[1][3568]([0-9]){9})
        /// </summary>
        /// <param name="strIn"></param>
        /// <returns></returns>
        public static bool IsMobile(string strIn)
        {
            return Regex.IsMatch(strIn, @"^((0)?[1][3568]([0-9]){9})");
        }