StringHelper

来源：互联网发布：淘宝怎么写追评编辑：程序博客网时间：2024/05/21 09:30
using System;using System.Collections.Generic;using System.Globalization;using System.Runtime.InteropServices;using System.Text;using System.Text.RegularExpressions;using Microsoft.VisualBasic;namespace FmallExternal.Helper{    /// <summary>    /// 字符串操作类    /// </summary>    public static class StringHelper    {        /// <summary>        /// Sql字符串过滤        /// </summary>        public static string SqlSafeString(string vlaue, bool isdel)        {            if (!string.IsNullOrWhiteSpace(vlaue))            {                if (isdel)                {                    vlaue = vlaue.Replace("'", "");                    vlaue = vlaue.Replace("\"", "");                    return vlaue;                }                else                {                    vlaue = vlaue.Replace("'", "&#39;");                    vlaue = vlaue.Replace("\"", "&#34;");                    return vlaue;                }            }            else            {                return vlaue;            }        }        /// <summary>        /// 得到字符串长度，一个汉字长度为2        /// </summary>        /// <param name="value">参数字符串</param>        /// <returns></returns>        public static int StrLength(string value)        {            ASCIIEncoding ascii = new ASCIIEncoding();            int tempLen = 0;            byte[] s = ascii.GetBytes(value);            for (int i = 0; i < s.Length; i++)            {                if ((int)s[i] == 63)                    tempLen += 2;                else                    tempLen += 1;            }            return tempLen;        }        /// <summary>        /// 要处理的字符串        /// </summary>        /// <param name="value">要处理的字符串</param>        /// <param name="len">指定字节长度</param>        /// <param name="isShowFix">是否显示神略号</param>        /// <returns></returns>        public static string ClipString(string value, int len, bool isShowFix)        {            if (!string.IsNullOrEmpty(value))            {                ASCIIEncoding ascii = new ASCIIEncoding();                int tempLen = 0;                string tempString = "";                byte[] s = ascii.GetBytes(value);                for (int i = 0; i < s.Length; i++)                {                    if ((int)s[i] == 63)                        tempLen += 2;                    else                        tempLen += 1;                    if (i < value.Length)                    {                        tempString += value.Substring(i, 1);                    }                    else                    {                        break;                    }                    if (tempLen > len)                        break;                }                byte[] mybyte = Encoding.Default.GetBytes(value);                if (isShowFix && mybyte.Length > len)                    tempString += "…";                return tempString;            }            else            {                return value;            }        }        /// <summary>        /// 截取指定长度字符串        /// </summary>        /// <param name="value">要处理的字符串</param>        /// <param name="len">指定字节长度</param>        /// <returns></returns>        public static string ClipString(string value, int len)        {            return ClipString(value, len, true);        }        /// <summary>        /// HTML转行成TEXT        /// </summary>        /// <param name="strHtml"></param>        /// <returns></returns>        public static string SimpleHtmlToText(string strHtml)        {            Regex regex1 = new Regex("<.+?>", RegexOptions.IgnoreCase);            Regex regex2 = new Regex("\\s+", RegexOptions.IgnoreCase);            string strOutput = "";            if (strHtml != null)            {                strOutput = regex1.Replace(strHtml, "");                strOutput = regex2.Replace(strOutput, "");            }            return strOutput;        }        /// <summary>        /// HTML转行成TEXT,完全过滤        /// </summary>        /// <param name="strHtml"></param>        /// <returns></returns>        public static string HtmlToText(string strHtml)        {            string[] aryReg ={                    @"<script[^>]*?>.*?</script>",                    @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",                    @"([\r\n])[\s]+",                    @"&(quot|#34);",                    @"&(amp|#38);",                    @"&(lt|#60);",                    @"&(gt|#62);",                     @"&(nbsp|#160);",                     @"&(iexcl|#161);",                    @"&(cent|#162);",                    @"&(pound|#163);",                    @"&(copy|#169);",                    @"&#(\d+);",                    @"-->",                    @"<!--.*\n"                    };            //string newReg = aryReg[0];            string strOutput = strHtml;            for (int i = 0; i < aryReg.Length; i++)            {                Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);                strOutput = regex.Replace(strOutput, string.Empty);            }            strOutput = strOutput.Replace("<", "");            strOutput = strOutput.Replace(">", "");            strOutput = strOutput.Replace("\r\n", "");            return strOutput;        }        /// <summary>        /// 按字母表位序输出字母        /// </summary>        /// <param name="index"></param>        /// <returns></returns>        public static char NumberToLetter(int index)        {            if (index >= 0 && index <= 25)            {                return Convert.ToChar(index + 65);            }            else            {                throw new ArgumentOutOfRangeException("index");            }        }        #region 繁简互转        /// <summary>        /// 将字符串转换成简体中文        /// </summary>        /// <param name="source">要转换的字符串</param>        /// <returns>转换完成后的字符串</returns>        public static string Big5ToGB(string source)        {            if (string.IsNullOrEmpty(source)) return string.Empty;            source = source.Replace("麼", "么");            String target = new String(' ', source.Length);            if (source.Length == NativeMethods.LCMapString(0x0800, 0x02000000, source, source.Length, target, source.Length))                return target;            else                throw new FormatException("无法转换成简体中文");        }        /// <summary>        /// 将字符串转换为繁体中文        /// </summary>        /// <param name="source">要转换的字符串</param>        /// <returns>转换完成后的字符串</returns>        public static string GBToBig5(string source)        {            if (string.IsNullOrEmpty(source)) return string.Empty;            String target = new String(' ', source.Length);            if (source.Length == NativeMethods.LCMapString(0x0800, 0x04000000, source, source.Length, target, source.Length))                return target;            else                throw new FormatException("无法转换成繁体中文");        }        #endregion        #region 提取汉字首字母        /// <summary>        /// GB2312中的汉字边界值        /// </summary>        private static int[] areacode = new int[27] {            45217,45253,45761,46318,46826,            47010,47297,47614,47614,48119,            49062,49324,49896,50371,50614,            50622,50906,51387,51446,52218,            52218,52218,52698,52980,53689,54481,            63487};        /// <summary>        /// 取出汉字的编码 cn 汉字        /// </summary>        /// <param name="myChar"></param>        /// <returns></returns>        private static int GetGbValue(char myChar)        {            byte[] bytes = Encoding.GetEncoding("gb2312").GetBytes(new char[] { myChar });            if (bytes.Length < 2)                return 0;            return (bytes[0] << 8 & 0xff00) + (bytes[1] & 0xff);        }        /// <summary>        /// 获取单个汉字的首拼音        /// </summary>        /// <param name="myChar">需要转换的字符</param>        /// <returns>转换结果</returns>        private static char getSpell(char myChar)        {            if (myChar >= 'a' && myChar <= 'z')                return (char)(myChar - 'a' + 'A');            if (myChar >= 'A' && myChar <= 'Z')                return myChar;            int gb = GetGbValue(myChar);            if ((gb < areacode[0]) || (gb > areacode[26]))// 在码表区间之前，直接返回                return myChar;            switch (myChar)            {                case '吖':                case '嗷':                    return 'A';                case '浣':                case '桦':                    return 'H';                case '晟':                    return 'S';                case '鑫':                    return 'X';                default:                    for (int i = 0; i < 26; i++)                    {                        if (areacode[i] <= gb && gb < areacode[i + 1])                        {                            return Encoding.GetEncoding("gb2312").GetString(new byte[] { (byte)(65 + i) })[0];                        }                    }                    break;            }            return '?';        }        /// <summary>        /// 提取汉字首字母        /// </summary>        /// <param name="strText">需要转换的字</param>        /// <returns>转换结果</returns>        public static string GetChineseSpell(string strText)        {            strText = Big5ToGB(strText);            int len = strText.Length;            string myStr = "";            for (int i = 0; i < len; i++)            {                myStr += getSpell(strText[i]);            }            return myStr;        }        #endregion    }    /// <summary>    /// 原生方法    /// </summary>    internal static class NativeMethods    {        [DllImport("kernel32", CharSet = CharSet.Unicode, SetLastError = true, ThrowOnUnmappableChar = true)]        internal static extern int LCMapString(int Locale, int dwMapFlags, string lpSrcStr, int cchSrc, [Out] string lpDestStr, int cchDest);    }}
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