.NET正则表达式字符串验证，案列

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

namespace ZC.Utils
{
    public class ValidateHelper
    {
        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]+$");
        private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$");
        private static Regex RegEmail = new Regex("^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$");
        private static Regex RegCHZN = new Regex("[一-龥]");

        public static int GetStringLength(string stringValue)
        {
            return Encoding.Default.GetBytes(stringValue).Length;
        }

        public static bool IsValidUserName(string userName)
        {
            int userNameLength = ValidateHelper.GetStringLength(userName);
            return userNameLength >= 4 && userNameLength <= 20 && Regex.IsMatch(userName, "^([\\u4e00-\\u9fa5A-Za-z_0-9]{0,})$");
        }

        public static bool IsValidPassword(string password)
        {
            return Regex.IsMatch(password, "^[A-Za-z_0-9]{6,16}$");
        }

        public static bool IsValidInt(string val)
        {
            return Regex.IsMatch(val, "^[1-9]\\d*\\.?[0]*$");
        }

        public static bool IsNumber(string inputData)
        {
            Match i = ValidateHelper.RegNumber.Match(inputData);
            return i.Success;
        }

        public static bool IsNumberSign(string inputData)
        {
            Match i = ValidateHelper.RegNumberSign.Match(inputData);
            return i.Success;
        }

        public static bool IsDecimal(string inputData)
        {
            Match i = ValidateHelper.RegDecimal.Match(inputData);
            return i.Success;
        }

        public static bool IsDecimalSign(string inputData)
        {
            Match i = ValidateHelper.RegDecimalSign.Match(inputData);
            return i.Success;
        }

        public static bool IsHasCHZN(string inputData)
        {
            Match i = ValidateHelper.RegCHZN.Match(inputData);
            return i.Success;
        }

        public static int GetCHZNLength(string inputData)
        {
            ASCIIEncoding i = new ASCIIEncoding();
            byte[] bytes = i.GetBytes(inputData);
            int length = 0;
            for (int j = 0; j <= bytes.Length - 1; j++)
            {
                if (bytes[j] == 63)
                {
                    length++;
                }
                length++;
            }
            return length;
        }

        public static bool IsIdCard(string idCard)
        {
            bool result;
            if (string.IsNullOrEmpty(idCard))
            {
                result = false;
            }
            else
            {
                if (idCard.Length == 15)
                {
                    result = Regex.IsMatch(idCard, "^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$");
                }
                else
                {
                    result = (idCard.Length == 18 && Regex.IsMatch(idCard, "^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])((\\d{4})|\\d{3}[A-Z])$", RegexOptions.IgnoreCase));
                }
            }
            return result;
        }

        public static bool IsEmail(string inputData)
        {
            Match i = ValidateHelper.RegEmail.Match(inputData);
            return i.Success;
        }

        public static bool IsValidZip(string zip)
        {
            Regex rx = new Regex("^\\d{6}$", RegexOptions.None);
            Match i = rx.Match(zip);
            return i.Success;
        }

        public static bool IsValidPhone(string phone)
        {
            Regex rx = new Regex("^(\\(\\d{3,4}\\)|\\d{3,4}-)?\\d{7,8}$", RegexOptions.None);
            Match i = rx.Match(phone);
            return i.Success;
        }

        public static bool IsValidMobile(string mobile)
        {
            Regex rx = new Regex("^(13|15)\\d{9}$", RegexOptions.None);
            Match i = rx.Match(mobile);
            return i.Success;
        }

        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 i = rx.Match(number);
            return i.Success;
        }

        public static 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]$");
        }

        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?)$");
        }

        public static bool IsValidDomain(string host)
        {
            Regex r = new Regex("^\\d+$");
            return host.IndexOf(".") != -1 && !r.IsMatch(host.Replace(".", string.Empty));
        }

        public static bool IsBase64String(string str)
        {
            return Regex.IsMatch(str, "[A-Za-z0-9\\+\\/\\=]");
        }

        public static bool IsGuid(string guid)
        {
            return !string.IsNullOrEmpty(guid) && Regex.IsMatch(guid, "[A-F0-9]{8}(-[A-F0-9]{4}){3}-[A-F0-9]{12}|[A-F0-9]{32}", RegexOptions.IgnoreCase);
        }

        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]))))))");
        }

        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}$");
        }

        public static string CheckMathLength(string inputData, int maxLength)
        {
            if (inputData != null && inputData != string.Empty)
            {
                inputData = inputData.Trim();
                if (inputData.Length > maxLength)
                {
                    inputData = inputData.Substring(0, maxLength);
                }
            }
            return inputData;
        }

        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;
        }

        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;
        }
    }
}