C# 判断字符串是否为2进制,8进制,10进制,16进制

￡神魔★判官ぃ 2022-05-31 06:54 292阅读 0赞

/// <summary>
            /// 判断是否十六进制格式字符串
            /// </summary>
            /// <param name="str">字符串</param>
            /// <returns>true 是  false 不是</returns>
            public static bool IsHexadecimal(string str)
            {
                if (str == "")
                    return false;
                const string PATTERN = @"[A-Fa-f0-9]+$";
                bool sign = false;
                for (int i = 0; i < str.Length; i++)
                {
                    sign=System.Text.RegularExpressions.Regex.IsMatch(str[i].ToString(), PATTERN);
                    if (!sign)
                    {
                        return sign;
                    }
                }
                return sign;
            }
    
            /// <summary>
            /// 判断是否八进制格式字符串
            /// </summary>
            /// <param name="str">字符串</param>
            /// <returns>true 是  false 不是</returns>
            public static bool IsOctal(string str)
            {
                if (str == "")
                    return false;
                const string PATTERN = @"[0-7]+$";
                bool sign = false;
                for (int i = 0; i < str.Length; i++)
                {
                    sign = System.Text.RegularExpressions.Regex.IsMatch(str[i].ToString(), PATTERN);
                    if (!sign)
                    {
                        return sign;
                    }
                }
                return sign;
            }
    
            /// <summary>
            /// 判断是否二进制格式字符串
            /// </summary>
            /// <param name="str">字符串</param>
            /// <returns>true 是  false 不是</returns>
            public static bool IsBinary(string str)
            {
                if (str == "")
                    return false;
                const string PATTERN = @"[0-1]+$";
                bool sign = false;
                for (int i = 0; i < str.Length; i++)
                {
                    sign = System.Text.RegularExpressions.Regex.IsMatch(str[i].ToString(), PATTERN);
                    if (!sign)
                    {
                        return sign;
                    }
                }
                return sign;
            }
    
            /// <summary>
            /// 判断是否十进制格式字符串
            /// </summary>
            /// <param name="str">字符串</param>
            /// <returns>true 是  false 不是</returns>
            public static bool IsDecimal(string str)
            {
                if (str == "")
                    return false;
                const string PATTERN = @"[0-9]+$";
                bool sign = false;
                for (int i = 0; i < str.Length; i++)
                {
                    sign = System.Text.RegularExpressions.Regex.IsMatch(str[i].ToString(), PATTERN);
                    if (!sign)
                    {
                        return sign;
                    }
                }
                return sign;
            }

原代码只能判断只要含有符合条件的字符就返回true,现修改为每个字符都要符合