[★] .NET C/S 如何使用正冊運算式

 class VilControl
    {
        /// <summary>
        /// 判斷是否被未空
        /// </summary>
        /// <returns>為空白返回false</returns>
        public static bool IsNull(string syllable)
        {
            if (syllable.Trim() == "") //判斷是否為空白輸入
            {
                return false;
            }

            return true;
        }

        /// <summary>
        /// 驗證字串是否合法
        /// </summary>
        /// <param name="syllable">需驗證字串</param>
        /// <param name="regex">Regex</param>
        /// <returns></returns>
        private static bool RegexOperation(string syllable, string regex)
        {
            //Regex的枚舉類型
            System.Text.RegularExpressions.RegexOptions options = (
                (System.Text.RegularExpressions.RegexOptions.IgnorePatternWhitespace |
                System.Text.RegularExpressions.RegexOptions.Multiline) |
                System.Text.RegularExpressions.RegexOptions.IgnoreCase);

            //載入Regex到枚舉類型上
            System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex(regex, options);

            //返回驗證結果
            return reg.IsMatch(syllable);
        }

        /// <summary>
        /// 判斷密碼是否超出長度(6~16)
        /// </summary>
        /// <returns>超長返回false</returns>
        public static bool IsLong(string syllable)
        {
            if (!IsNull(syllable)) //判斷是否為空白輸入
            {
                return false;
            }

            bool problem = true;

            if (syllable.Length > 16 || syllable.Length < 6) //判斷是否符合密碼位元
            {
                return problem = false;
            }
            return problem;
        }

        /// <summary>
        /// 年齡(長度/整數)(1~110)
        /// </summary>
        /// <returns>不正確返回false</returns>
        public static bool IsAge(string syllable)
        {
            if (!IsNull(syllable)) //判斷是否為空白輸入
            {
                return false;
            }

            if ((Convert.ToInt32(syllable) > 110 || Convert.ToInt32(syllable) < 1))//判斷長度
            {
                return false;
            }

            string regex = "^[0-9]{1,}$"; //判斷為數字

            return RegexOperation(syllable, regex);
        }

        /// <summary>
        /// 是否符合電話號碼的要求(3-8,4-7,11)
        /// </summary>
        /// <returns>不符合返回false</returns>
        public static bool IsPhone(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            //Regex
            string regex = @"\d{3}-\d{8}|\d{4}-\d{7}|\d{11}";

            //返回驗證結果
            return RegexOperation(syllable, regex);
        }
   

        /// <summary>
        /// 是否符合日期的要求(2002-02-02)
        /// </summary>
        /// <returns>不符合返回false</returns>
        public static bool IsDay(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            //Regex
            string regex = @"^((((1[6-9]|[2-9]\d)\d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]\d|3[01]))|(((1[6-9]|[2-9]\d)\d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]\d|30))|(((1[6-9]|[2-9]\d)\d{2})-0?2-(0?[1-9]|1\d|2[0-8]))|(((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$";

            //返回驗證結果
            return RegexOperation(syllable, regex);
        }

        /// <summary>
        /// 是否符合電子郵件的要求
        /// </summary>
        /// <returns>不符合返回false</returns>
        public static bool IsE_Mail(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            //Regex
            string regex = @"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";

            //返回驗證結果
            return RegexOperation(syllable, regex);
        }

        /// <summary>
        /// 由數字和26個英文字母或者底線組成的字串
        /// </summary>
        /// <param name="strVerify"></param>
        /// <returns></returns>
        public static bool StrVerify(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            string regex = @"^\w+$";
            return RegexOperation(syllable, regex);
        }

        /// <summary>
        /// 只能輸入有1~3位小數的正實數
        /// </summary>
        /// <param name="strVerify"></param>
        /// <returns></returns>
        public static bool NumDec(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            //Regex
            string regex = @"^[0-9]+(.[0-9]{1,3})?$";

            //返回驗證結果
            return RegexOperation(syllable, regex);
        }

        /// <summary>
        /// 以字母開頭，長度在6到18，只能包含字元、數字和底線
        /// </summary>
        /// <param name="strVerify"></param>
        /// <returns></returns>
        public static bool StrVerifyStart(string syllable)
        {
            //判斷是否為空白輸入
            if (!IsNull(syllable))
            {
                return false;
            }

            //Regex
            string regex = @"^[a-zA-Z]\w{5,17}$";

            //返回驗證結果
            return RegexOperation(syllable, regex);
        }
    }