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    3. SiteFactory 通用程序集中(PowerEasy.Common)的常用字符串处理函数

    SiteFactory 通用程序集中(PowerEasy.Common)的常用字符串处理函数

    技术2025-01-02  55

       以下是常用字符处理类StringHelper的各方法,这里给方法添加了简单的注释 ---------------------  

           ///

           /// 使用逗号分割符,扩充字符串        ///        ///        ///         public static void AppendString(StringBuilder sb, string append)         {             AppendString(sb, append, ",");         }        ///         /// 使用分割符,扩充字符串        ///        ///        ///        ///         public static void AppendString(StringBuilder sb, string append, string split)         {             if (sb.Length == 0)             {                 sb.Append(append);             }             else             {                 sb.Append(split);                 sb.Append(append);             }         }        ///        /// 从Base64字符串中还原字符串        ///        ///        ///         public static string Base64StringDecode(string input)         {             byte[] bytes = Convert.FromBase64String(input);             return Encoding.UTF8.GetString(bytes);         }        ///         /// 将字符串保存为Base64编码序列        ///        ///        ///         public static string Base64StringEncode(string input)         {             return Convert.ToBase64String(Encoding.UTF8.GetBytes(input));         }

           ///

           /// 将使用long表示的Ip转换为字符串表示        ///        ///        ///         public static string DecodeIP(long ip)         {             string[] strArray = new string[] { ((ip >> 0x18) & 0xffL).ToString(), ".", ((ip >> 0x10) & 0xffL).ToString(), ".", ((ip >> 8) & 0xffL).ToString(), ".", (ip & 0xffL).ToString() };             return string.Concat(strArray);         }

            ///

            /// 将使用字符串表示的IP转换为使用数字值         ///         ///         ///         public static double EncodeIP(string sip)         {             if (string.IsNullOrEmpty(sip))             {                 return 0.0;             }             string[] strArray = sip.Split(new char[] { '.' });             long num = 0L;             foreach (string str in strArray)             {                 byte num2;                 if (byte.TryParse(str, out num2))                 {                     num = (num << 8) | num2;                 }                 else                 {                     return 0.0;                 }             }             return num;         }

           ///

           /// 过滤标签,正则匹配时使用非贪婪模式        ///        /// 待处理的文本数据        /// 标签名称如,html,Script等        /// 过滤方式,可以取(1|2|3)        /// 1:是单个标签如img等,        /// 2:表示配对出现的标签如div等将清除此标签已经标签内的全部文本,        /// 3:表示也是针对配对出现的标签,但是保留标签内的内容.        ///        ///        public static string CollectionFilter(string conStr, string tagName, int fType)        {            string input = conStr;            switch (fType)            {                case 1:                    return Regex.Replace(input, "<" + tagName + "([^>])*>", "", RegexOptions.IgnoreCase);

                   case 2:                    return Regex.Replace(input, "<" + tagName + "([^>])*>.*? ])*>", "", RegexOptions.IgnoreCase);

                   case 3:                    return Regex.Replace(Regex.Replace(input, "<" + tagName + "([^>])*>", "", RegexOptions.IgnoreCase), " ])*>", "", RegexOptions.IgnoreCase);            }            return input;        }        ///

           /// 过滤指定的标签        ///        /// 待过滤文本数据        /// 需要过滤的列表用","阁开如:Iframe,Object,Style,Script,Div        ///         public static string FilterScript(string conStr, string filterItem)         {             string str = conStr.Replace("/r", "{$Chr13}").Replace("/n", "{$Chr10}");             string[] strArray = filterItem.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);             foreach (string str2 in strArray)             {                 switch (str2)                 {                     case "Iframe":                         str = CollectionFilter(str, str2, 2);                         break;

                        case "Object":                         str = CollectionFilter(str, str2, 2);                         break;

                        case "Script":                         str = CollectionFilter(str, str2, 2);                         break;

                        case "Style":                         str = CollectionFilter(str, str2, 2);                         break;

                        case "Div":                         str = CollectionFilter(str, str2, 3);                         break;

                        case "Span":                         str = CollectionFilter(str, str2, 3);                         break;

                        case "Table":                         str = CollectionFilter(CollectionFilter(CollectionFilter(CollectionFilter(CollectionFilter(str, str2, 3), "Tbody", 3), "Tr", 3), "Td", 3), "Th", 3);                         break;

                        case "Img":                         str = CollectionFilter(str, str2, 1);                         break;

                        case "Font":                         str = CollectionFilter(str, str2, 3);                         break;

                        case "A":                         str = CollectionFilter(str, str2, 3);                         break;

                        case "Html":                         str = StripTags(str);                         goto Label_0218;                 }             }         Label_0218:             return str.Replace("{$Chr13}", "/r").Replace("{$Chr10}", "/n");         }

            public static bool FoundCharInArr(string checkStr, string findStr)         {             return FoundCharInArr(checkStr, findStr, ",");         }

            public static bool FoundCharInArr(string checkStr, string findStr, string split)         {             bool flag = false;             if (string.IsNullOrEmpty(split))             {                 split = ",";             }             if (string.IsNullOrEmpty(checkStr))             {                 return false;             }             if (checkStr.IndexOf(split) != -1)             {                 string[] strArray;                 if (findStr.IndexOf(split) != -1)                 {                     strArray = checkStr.Split(new char[] { Convert.ToChar(split) });                     string[] strArray2 = findStr.Split(new char[] { Convert.ToChar(split) });                     foreach (string str in strArray)                     {                         foreach (string str2 in strArray2)                         {                             if (string.Compare(str, str2) == 0)                             {                                 flag = true;                                 break;                             }                         }                         if (flag)                         {                             return flag;                         }                     }                     return flag;                 }                 strArray = checkStr.Split(new char[] { Convert.ToChar(split) });                 foreach (string str in strArray)                 {                     if (string.Compare(str, findStr) == 0)                     {                         return true;                     }                 }                 return flag;             }             if (string.Compare(checkStr, findStr) == 0)             {                 flag = true;             }             return flag;         }        ///

           /// 在字符串序列中(使用分割符连接的)查找指定值        ///        ///        ///        ///        ///         public static bool FoundInArr(string checkStr, string findStr, string split)         {             bool flag = false;             if (checkStr.IndexOf(findStr) != -1)             {                 string[] strArray = checkStr.Split(new string[] { split }, StringSplitOptions.RemoveEmptyEntries);                 foreach (string str in strArray)                 {                     if (string.Compare(str, findStr) == 0)                     {                         return true;                     }                 }                 return flag;             }             if (string.Compare(checkStr, findStr) == 0)             {                 flag = true;             }             return flag;         }        ///        /// 返回字符串首字符,如果字符串首字符是汉字则返回其拼音的第一个字符(A-Z)        ///        ///        ///         private static string GetGbkX(string testTxt)         {             if (testTxt.CompareTo("吖") >= 0)             {                 if (testTxt.CompareTo("八") < 0)                 {                     return "A";                 }                 if (testTxt.CompareTo("嚓") < 0)                 {                     return "B";                 }                 if (testTxt.CompareTo("咑") < 0)                 {                     return "C";                 }                 if (testTxt.CompareTo("妸") < 0)                 {                     return "D";                 }                 if (testTxt.CompareTo("发") < 0)                 {                     return "E";                 }                 if (testTxt.CompareTo("旮") < 0)                 {                     return "F";                 }                 if (testTxt.CompareTo("铪") < 0)                 {                     return "G";                 }                 if (testTxt.CompareTo("讥") < 0)                 {                     return "H";                 }                 if (testTxt.CompareTo("咔") < 0)                 {                     return "J";                 }                 if (testTxt.CompareTo("垃") < 0)                 {                     return "K";                 }                 if (testTxt.CompareTo("嘸") < 0)                 {                     return "L";                 }                 if (testTxt.CompareTo("拏") < 0)                 {                     return "M";                 }                 if (testTxt.CompareTo("噢") < 0)                 {                     return "N";                 }                 if (testTxt.CompareTo("妑") < 0)                 {                     return "O";                 }                 if (testTxt.CompareTo("七") < 0)                 {                     return "P";                 }                 if (testTxt.CompareTo("亽") < 0)                 {                     return "Q";                 }                 if (testTxt.CompareTo("仨") < 0)                 {                     return "R";                 }                 if (testTxt.CompareTo("他") < 0)                 {                     return "S";                 }                 if (testTxt.CompareTo("哇") < 0)                 {                     return "T";                 }                 if (testTxt.CompareTo("夕") < 0)                 {                     return "W";                 }                 if (testTxt.CompareTo("丫") < 0)                 {                     return "X";                 }                 if (testTxt.CompareTo("帀") < 0)                 {                     return "Y";                 }                 if (testTxt.CompareTo("咗") < 0)                 {                     return "Z";                 }             }             return testTxt;         }        ///        /// 返回字串的拼音首字母序列(字串中的英文直接返回)        ///        ///        ///         public static string GetInitial(string str)         {             StringBuilder builder = new StringBuilder();             for (int i = 0; i < str.Length; i++)             {                 builder.Append(GetOneIndex(str.Substring(i, 1)));             }             return builder.ToString();         }

            private static string GetOneIndex(string testTxt)         {             if ((Convert.ToChar(testTxt) >= '/0') && (Convert.ToChar(testTxt) < 'Ā'))             {                 return testTxt;             }             return GetGbkX(testTxt);         }        ///

           /// 是否包含中文        ///        ///        ///         public static bool IsIncludeChinese(string inputData)         {             Regex regex = new Regex("[一-龥]");             return regex.Match(inputData).Success;         }        ///        /// 计算MD5散列        ///        ///        ///         public static string MD5(string input)         {             using (MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider())             {                 return BitConverter.ToString(provider.ComputeHash(Encoding.UTF8.GetBytes(input))).Replace("-", "").ToLower();             }         }

            public static int MD5D(string strText)         {             using (MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider())             {                 byte[] bytes = Encoding.Default.GetBytes(strText);                 bytes = provider.ComputeHash(bytes);                 StringBuilder builder = new StringBuilder();                 foreach (byte num in bytes)                 {                     builder.Append(num.ToString("D").ToLower());                 }                 string input = builder.ToString();                 if (input.Length >= 9)                 {                     input = "9" + input.Substring(1, 8);                 }                 else                 {                     input = "9" + input;                 }                 provider.Clear();                 return CLng(input);             }         }        private static int CLng(string input)        {            int num;            int.TryParse(input, out num);            return num;        }

           ///

           /// 使用GB2312编码来计算字符号的MD5值,返回32位序列        ///        ///        ///         public static string MD5gb2312(string input)         {             using (MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider())             {                 return BitConverter.ToString(provider.ComputeHash(Encoding.GetEncoding("gb2312").GetBytes(input))).Replace("-", "").ToLower();             }         }

            public static string RemoveXss(string input)         {             string str;             input = Regex.Replace(input, @"(&*/w+)[/x00-/x20]+;", "$1;");             input = Regex.Replace(input, "(&x*[0-9A-F]+);*", "$1;", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "&(amp|lt|gt|nbsp|quot);", "&$1;");             input = HttpUtility.HtmlDecode(input);             input = Regex.Replace(input, @"[/x00-/x08/x0b-/x0c/x0e-/x19]", "");             input = Regex.Replace(input, "(<[^>]+[//x00-//x20/"'/])(on|xmlns)[^>]*>", "$1>", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "([a-z]*)[//x00-//x20]*=[//x00-//x20]*([`'/"]*)[//x00-//x20]*j[//x00-//x20]*a[//x00-//x20]*v[//x00-//x20]*a[//x00-//x20]*s[//x00-//x20]*c[//x00-//x20]*r[//x00-//x20]*i[//x00-//x20]*p[//x00-//x20]*t[//x00-//x20]*:", "$1=$2nojavascript...", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "([a-z]*)[//x00-//x20]*=[//x00-//x20]*([`'/"]*)[//x00-//x20]*v[//x00-//x20]*b[//x00-//x20]*s[//x00-//x20]*c[//x00-//x20]*r[//x00-//x20]*i[//x00-//x20]*p[//x00-//x20]*t[//x00-//x20]*:", "$1=$2novbscript...", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "(<[^>]+)style[//x00-//x20]*=[//x00-//x20]*([`'/"]*).*expression[//x00-//x20]*//([^>]*>", "$1>", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "(<[^>]+)style[//x00-//x20]*=[//x00-//x20]*([`'/"]*).*behaviour[//x00-//x20]*//([^>]*>", "$1>", RegexOptions.IgnoreCase);             input = Regex.Replace(input, "(<[^>]+)style[//x00-//x20]*=[//x00-//x20]*([`'/"]*).*s[//x00-//x20]*c[//x00-//x20]*r[//x00-//x20]*i[//x00-//x20]*p[//x00-//x20]*t[//x00-//x20]*:*[^>]*>", "$1>", RegexOptions.IgnoreCase);             input = Regex.Replace(input, @" ]*>", "");             do             {                 str = input;                 input = Regex.Replace(input, " ]*>", "", RegexOptions.IgnoreCase);             }             while (str != input);             return input;         }         ///

            /// 不区分大小写来替换字符串         ///         ///         ///         ///         ///         public static string ReplaceIgnoreCase(string input, string oldValue, string newValue)         {             return Strings.Replace(input, oldValue, newValue, 1, -1, CompareMethod.Text);         }        ///        /// 使用SHA1计算字符串的散列值        ///        ///        ///         public static string SHA1(string input)         {             using (SHA1CryptoServiceProvider provider = new SHA1CryptoServiceProvider())             {                 return BitConverter.ToString(provider.ComputeHash(Encoding.UTF8.GetBytes(input))).Replace("-", "").ToLower();             }         }        ///        /// 过滤使用使用尖括号括起来的标签,不包括全部HTML定义如( 等实体)        ///        ///        ///         public static string StripTags(string input)         {             Regex regex = new Regex("<([^<]|/n)+?>");             return regex.Replace(input, "");         }        ///        /// 按汉字计2,其他字符计1来取指定长度字符号串        ///        /// 需要截断的字符串        /// 需要的长度        /// 省略后替代的字符如:"..."等        ///         public static string SubString(string demand, int length, string substitute)         {             if (Encoding.Default.GetBytes(demand).Length <= length)             {                 return demand;             }             ASCIIEncoding encoding = new ASCIIEncoding();             length -= Encoding.Default.GetBytes(substitute).Length;             int num = 0;             StringBuilder builder = new StringBuilder();             byte[] bytes = encoding.GetBytes(demand);             for (int i = 0; i < bytes.Length; i++)             {                 if (bytes[i] == 0x3f)                 {                     num += 2;                 }                 else                 {                     num++;                 }                 if (num > length)                 {                     break;                 }                 builder.Append(demand.Substring(i, 1));             }             builder.Append(substitute);             return builder.ToString();         }        ///        /// 返回字串长度,中文字符为计2,其他计1        /// 使用ASCII将字符串转化为字节数组时(byte[]),数组长度跟字符串长度相同        /// 非中文字符取其ASCII码,中文ASCII码为63即?(十六进制为0x3F)        ///        ///        ///         public static int StringLength(string strValue)         {             if (string.IsNullOrEmpty(strValue))             {                 return 0;             }             int num = 0;             byte[] bytes = Encoding.ASCII.GetBytes(strValue);             for (int i = 0; i < bytes.Length; i++)             {                 if (bytes[i] == 0x3f)                 {                     num += 2;                 }                 else                 {                     num++;                 }             }             return num;         }        ///        /// 去除字串两边的空格,当字串为Null Or Empty时,返回 String.Empty        ///        ///        ///         public static string Trim(string returnStr)         {             if (!string.IsNullOrEmpty(returnStr))             {                 return returnStr.Trim();             }             return string.Empty;         }         ///         /// 将传入的password参数与md5Value参数进行比较(分别截取md5Valude的16位与32位)         ///         /// MD5后的哈希值         /// MD5后的哈希值         ///         public static bool ValidateMD5(string password, string md5Value)         {             return ((string.Compare(password, md5Value) == 0) || (string.Compare(password, md5Value.Substring(8, 0x10)) == 0));         }

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