ASP.NET公共类库之字符串实用类StringUtil.cs

/**********************************************
 * 类作用：   字符串实用类
 * 作者：开优网络
* http://www.kaiu.net
 ***********************************************/

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Text.RegularExpressions;
using System.Collections;

namespace Svnhost.Common
{

    /// <summary>
    /// 字符串实用类
    /// </summary>
    public sealed class StringUtil
    {
        private StringUtil()
        {
        }

        public static string md5(string str)
        {
            return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").Substring(8, 16);
        }

        public static string md5(string str, int length)
        {
            if (length == 16)
                return md5(str);

            return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5");
        }

        public static string GetTags(string tags)
        {
            if (tags == null)
                return null;

            string[] arrTag = tags.Split(",， ".ToCharArray());
            StringBuilder sb = new StringBuilder(arrTag[0]);
            Hashtable hash = new Hashtable();
            hash.Add(arrTag[0], string.Empty);
            for (int i = 1; i < arrTag.Length; i++)
            {
                if (arrTag[i]!=null && arrTag[i] != string.Empty && !hash.Contains(arrTag[i].ToLower()))
                {
                    sb.Append(string.Format(",{0}", arrTag[i]));
                    hash.Add(arrTag[i].ToLower(), string.Empty);
                }
            }

            return sb.ToString();
        }


        /// <summary>
        /// 返回字符串真实长度, 1个汉字长度为2
        /// </summary>
        /// <returns></returns>
        public static int GetStringLength(string str)
        {
            return Encoding.Default.GetBytes(str).Length;
        }

        

        /// <summary>
        /// 判断指定字符串在指定字符串数组中的位置
        /// </summary>
        /// <param name="strSearch">字符串</param>
        /// <param name="stringArray">字符串数组</param>
        /// <param name="caseInsensetive">是否不区分大小写, true为不区分, false为区分</param>
        /// <returns>字符串在指定字符串数组中的位置, 如不存在则返回-1</returns>
        public static int GetInArrayID(string strSearch, string[] stringArray, bool caseInsensetive)
        {
            for (int i = 0; i < stringArray.Length; i++)
            {
                if (caseInsensetive)
                {
                    if (strSearch.ToLower() == stringArray[i].ToLower())
                    {
                        return i;
                    }
                }
                else
                {
                    if (strSearch == stringArray[i])
                    {
                        return i;
                    }
                }

            }
            return -1;
        }


        /// <summary>
        /// 判断指定字符串在指定字符串数组中的位置
        /// </summary>
        /// <param name="strSearch">字符串</param>
        /// <param name="stringArray">字符串数组</param>
        /// <returns>字符串在指定字符串数组中的位置, 如不存在则返回-1</returns>		
        public static int GetInArrayID(string strSearch, string[] stringArray)
        {
            return GetInArrayID(strSearch, stringArray, true);
        }



        /// <summary>
        /// 删除字符串尾部的回车/换行/空格
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string RTrim(string str)
        {
            for (int i = str.Length; i >= 0; i--)
            {
                if (str[i].Equals(" ") || str[i].Equals("\r") || str[i].Equals("\n"))
                {
                    str.Remove(i, 1);
                }
            }
            return str;
        }



        /// <summary>
        /// 从字符串的指定位置截取指定长度的子字符串
        /// </summary>
        /// <param name="str">原字符串</param>
        /// <param name="startIndex">子字符串的起始位置</param>
        /// <param name="length">子字符串的长度</param>
        /// <returns>子字符串</returns>
        public static string CutString(string str, int startIndex, int length)
        {
            if (str == null)
            {
                str = "";
            }
            if (startIndex >= 0)
            {
                if (length < 0)
                {
                    length = length * -1;
                    if (startIndex - length < 0)
                    {
                        length = startIndex;
                        startIndex = 0;
                    }
                    else
                    {
                        startIndex = startIndex - length;
                    }
                }


                if (startIndex > str.Length)
                {
                    return "";
                }


            }
            else
            {
                if (length < 0)
                {
                    return "";
                }
                else
                {
                    if (length + startIndex > 0)
                    {
                        length = length + startIndex;
                        startIndex = 0;
                    }
                    else
                    {
                        return "";
                    }
                }
            }

            if (str.Length - startIndex < length)
            {
                length = str.Length - startIndex;
            }

            return str.Substring(startIndex, length);
        }

        /// <summary>
        /// 从字符串的指定位置开始截取到字符串结尾的了符串
        /// </summary>
        /// <param name="str">原字符串</param>
        /// <param name="startIndex">子字符串的起始位置</param>
        /// <returns>子字符串</returns>
        public static string CutString(string str, int startIndex)
        {
            return CutString(str, startIndex, str.Length);
        }

        /// <summary>
        /// 字符串如果操过指定长度则将超出的部分用指定字符串代替
        /// </summary>
        /// <param name="p_SrcString">要检查的字符串</param>
        /// <param name="p_Length">指定长度</param>
        /// <param name="p_TailString">用于替换的字符串</param>
        /// <returns>截取后的字符串</returns>
        public static string GetSubString(string p_SrcString, int p_Length, string p_TailString)
        {
            return GetSubString(p_SrcString, 0, p_Length, p_TailString);
        }


        /// <summary>
        /// 取指定长度的字符串
        /// </summary>
        /// <param name="p_SrcString">要检查的字符串</param>
        /// <param name="p_StartIndex">起始位置</param>
        /// <param name="p_Length">指定长度</param>
        /// <param name="p_TailString">用于替换的字符串</param>
        /// <returns>截取后的字符串</returns>
        public static string GetSubString(string p_SrcString, int p_StartIndex, int p_Length, string p_TailString)
        {


            string myResult = p_SrcString;

            //当是日文或韩文时(注:中文的范围:\u4e00 - \u9fa5, 日文在\u0800 - \u4e00, 韩文为\xAC00-\xD7A3)
            if (System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\u0800-\u4e00]+") ||
                System.Text.RegularExpressions.Regex.IsMatch(p_SrcString, "[\xAC00-\xD7A3]+"))
            {
                //当截取的起始位置超出字段串长度时
                if (p_StartIndex >= p_SrcString.Length)
                {
                    return "";
                }
                else
                {
                    return p_SrcString.Substring(p_StartIndex,
                                                   ((p_Length + p_StartIndex) > p_SrcString.Length) ? (p_SrcString.Length - p_StartIndex) : p_Length);
                }
            }


            if (p_Length >= 0)
            {
                byte[] bsSrcString = Encoding.Default.GetBytes(p_SrcString);

                //当字符串长度大于起始位置
                if (bsSrcString.Length > p_StartIndex)
                {
                    int p_EndIndex = bsSrcString.Length;

                    //当要截取的长度在字符串的有效长度范围内
                    if (bsSrcString.Length > (p_StartIndex + p_Length))
                    {
                        p_EndIndex = p_Length + p_StartIndex;
                    }
                    else
                    {   //当不在有效范围内时,只取到字符串的结尾

                        p_Length = bsSrcString.Length - p_StartIndex;
                        p_TailString = "";
                    }



                    int nRealLength = p_Length;
                    int[] anResultFlag = new int[p_Length];
                    byte[] bsResult = null;

                    int nFlag = 0;
                    for (int i = p_StartIndex; i < p_EndIndex; i++)
                    {

                        if (bsSrcString[i] > 127)
                        {
                            nFlag++;
                            if (nFlag == 3)
                            {
                                nFlag = 1;
                            }
                        }
                        else
                        {
                            nFlag = 0;
                        }

                        anResultFlag[i] = nFlag;
                    }

                    if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_Length - 1] == 1))
                    {
                        nRealLength = p_Length + 1;
                    }

                    bsResult = new byte[nRealLength];

                    Array.Copy(bsSrcString, p_StartIndex, bsResult, 0, nRealLength);

                    myResult = Encoding.Default.GetString(bsResult);

                    myResult = myResult + p_TailString;
                }
            }

            return myResult;
        }

        /// <summary>
        /// 自定义的替换字符串函数
        /// </summary>
        public static string ReplaceString(string SourceString, string SearchString, string ReplaceString, bool IsCaseInsensetive)
        {
            return Regex.Replace(SourceString, Regex.Escape(SearchString), ReplaceString, IsCaseInsensetive ? RegexOptions.IgnoreCase : RegexOptions.None);
        }

        /// <summary>
        /// 生成指定数量的html空格符号
        /// </summary>
        public static string Spaces(int nSpaces)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < nSpaces; i++)
            {
                sb.Append(" &nbsp;&nbsp;");
            }
            return sb.ToString();
        }

        /// <summary>
        /// 清理字符串
        /// </summary>
        public static string CleanInput(string strIn)
        {
            return Regex.Replace(strIn.Trim(), @"[^\w\.@-]", "");
        }

        /// <summary>
        /// 分割字符串
        /// </summary>
        public static string[] SplitString(string strContent, string strSplit)
        {
            if (strContent.IndexOf(strSplit) < 0)
            {
                string[] tmp = { strContent };
                return tmp;
            }
            return Regex.Split(strContent, Regex.Escape(strSplit), RegexOptions.IgnoreCase);
        }

        /// <summary>
        /// 分割字符串
        /// </summary>
        public static string[] SplitStringByRegex(string strContent, string strSplit)
        {
            if (!Regex.IsMatch(strContent, strSplit))
            {
                string[] tmp = { strContent };
                return tmp;
            }
            return Regex.Split(strContent, strSplit, RegexOptions.IgnoreCase);
        }

        /// <summary>
        /// 分割字符串
        /// </summary>
        /// <returns></returns>
        public static string[] SplitString(string strContent, string strSplit, int p_3)
        {
            string[] result = new string[p_3];

            string[] splited = SplitString(strContent, strSplit);

            for (int i = 0; i < p_3; i++)
            {
                if (i < splited.Length)
                    result[i] = splited[i];
                else
                    result[i] = string.Empty;
            }

            return result;
        }

        /// <summary>
        /// 返回 HTML 字符串的编码结果
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>编码结果</returns>
        public static string HtmlEncode(string str)
        {
            if (str == null)
                return null;
            return str.Replace(" ", "&nbsp;").Replace("\r\n", "<br />");
        }

        /// <summary>
        /// 返回 HTML 字符串的解码结果
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>解码结果</returns>
        public static string HtmlDecode(string str)
        {
            if (str == null)
                return null;
            return str.Replace("&nbsp;", " ").Replace("<br />", "\r\n");
        }

        /// <summary>
        /// 返回 URL 字符串的编码结果
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>编码结果</returns>
        public static string UrlEncode(string str)
        {
            return HttpUtility.UrlEncode(str);
        }

        /// <summary>
        /// 返回 URL 字符串的编码结果
        /// </summary>
        /// <param name="str">字符串</param>
        /// <returns>解码结果</returns>
        public static string UrlDecode(string str)
        {
            return HttpUtility.UrlDecode(str);
        }

        /// <summary>
        /// string型转换为bool型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的bool类型结果</returns>
        public static bool StrToBool(object Expression, bool defValue)
        {
            return TypeParse.StrToBool(Expression, defValue);
        }

        /// <summary>
        /// 将对象转换为Int32类型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int StrToInt(object Expression, int defValue)
        {
            return TypeParse.StrToInt(Expression, defValue);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(object strValue, float defValue)
        {
            return TypeParse.StrToFloat(strValue, defValue);
        }
        /// <summary>
        /// 删除最后一个字符
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string ClearLastChar(string str)
        {
            if (str == "")
                return "";
            else
                return str.Substring(0, str.Length - 1);
        }

        /// <summary>
        /// 将全角数字转换为数字
        /// </summary>
        /// <param name="SBCCase"></param>
        /// <returns></returns>
        public static string SBCCaseToNumberic(string SBCCase)
        {
            char[] c = SBCCase.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
                if (b.Length == 2)
                {
                    if (b[1] == 255)
                    {
                        b[0] = (byte)(b[0] + 32);
                        b[1] = 0;
                        c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                    }
                }
            }
            return new string(c);
        }


        static public string GetChineseSpell(string strText)
        {
            int len = strText.Length;
            string myStr = "";
            for (int i = 0; i < len; i++)
            {
                myStr += getSpell(strText.Substring(i, 1));
            }
            return myStr;
        }

        static public string getSpell(string cnChar)
        {
            byte[] arrCN = Encoding.Default.GetBytes(cnChar);
            if (arrCN.Length > 1)
            {
                int area = (short)arrCN[0];
                int pos = (short)arrCN[1];
                int code = (area << 8) + pos;
                int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
                for (int i = 0; i < 26; i++)
                {
                    int max = 55290;
                    if (i != 25) max = areacode[i + 1];
                    if (areacode[i] <= code && code < max)
                    {
                        return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                    }
                }
                return "*";
            }
            else return cnChar;
        }

        /// <summary>
        /// 从字符串中的尾部删除指定的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="removedString"></param>
        /// <returns></returns>
        public static string Remove(string sourceString, string removedString)
        {
            try
            {
                if (sourceString.IndexOf(removedString) < 0)
                    throw new Exception("原字符串中不包含移除字符串！");
                string result = sourceString;
                int lengthOfSourceString = sourceString.Length;
                int lengthOfRemovedString = removedString.Length;
                int startIndex = lengthOfSourceString - lengthOfRemovedString;
                string tempSubString = sourceString.Substring(startIndex);
                if (tempSubString.ToUpper() == removedString.ToUpper())
                {
                    result = sourceString.Remove(startIndex, lengthOfRemovedString);
                }
                return result;
            }
            catch
            {
                return sourceString;
            }
        }

        /// <summary>
        /// 获取拆分符右边的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="splitChar"></param>
        /// <returns></returns>
        public static string RightSplit(string sourceString, char splitChar)
        {
            string result = null;
            string[] tempString = sourceString.Split(splitChar);
            if (tempString.Length > 0)
            {
                result = tempString[tempString.Length - 1].ToString();
            }
            return result;
        }

        /// <summary>
        /// 获取拆分符左边的字符串
        /// </summary>
        /// <param name="sourceString"></param>
        /// <param name="splitChar"></param>
        /// <returns></returns>
        public static string LeftSplit(string sourceString, char splitChar)
        {
            string result = null;
            string[] tempString = sourceString.Split(splitChar);
            if (tempString.Length > 0)
            {
                result = tempString[0].ToString();
            }
            return result;
        }

        /// <summary>
        /// 去掉最后一个逗号
        /// </summary>
        /// <param name="origin"></param>
        /// <returns></returns>
        public static string DelLastComma(string origin)
        {
            if (origin.IndexOf(",") == -1)
            {
                return origin;
            }
            return origin.Substring(0, origin.LastIndexOf(","));
        }

        /// <summary>
        /// 删除不可见字符
        /// </summary>
        /// <param name="sourceString"></param>
        /// <returns></returns>
        public static string DeleteUnVisibleChar(string sourceString)
        {
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder(131);
            for (int i = 0; i < sourceString.Length; i++)
            {
                int Unicode = sourceString[i];
                if (Unicode >= 16)
                {
                    sBuilder.Append(sourceString[i].ToString());
                }
            }
            return sBuilder.ToString();
        }

        /// <summary>
        /// 获取数组元素的合并字符串
        /// </summary>
        /// <param name="stringArray"></param>
        /// <returns></returns>
        public static string GetArrayString(string[] stringArray)
        {
            string totalString = null;
            for (int i = 0; i < stringArray.Length; i++)
            {
                totalString = totalString + stringArray[i];
            }
            return totalString;
        }

        /// <summary>
        ///		获取某一字符串在字符串数组中出现的次数
        /// </summary>
        /// <param name="stringArray" type="string[]">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <param name="findString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <returns>
        ///     A int value...
        /// </returns>
        public static int GetStringCount(string[] stringArray, string findString)
        {
            int count = -1;
            string totalString = GetArrayString(stringArray);
            string subString = totalString;

            while (subString.IndexOf(findString) >= 0)
            {
                subString = totalString.Substring(subString.IndexOf(findString));
                count += 1;
            }
            return count;
        }

        /// <summary>
        ///     获取某一字符串在字符串中出现的次数
        /// </summary>
        /// <param name="stringArray" type="string">
        ///     <para>
        ///         原字符串
        ///     </para>
        /// </param>
        /// <param name="findString" type="string">
        ///     <para>
        ///         匹配字符串
        ///     </para>
        /// </param>
        /// <returns>
        ///     匹配字符串数量
        /// </returns>
        public static int GetStringCount(string sourceString, string findString)
        {
            int count = 0;
            int findStringLength = findString.Length;
            string subString = sourceString;

            while (subString.IndexOf(findString) >= 0)
            {
                subString = subString.Substring(subString.IndexOf(findString) + findStringLength);
                count += 1;
            }
            return count;
        }

        /// <summary>
        /// 截取从startString开始到原字符串结尾的所有字符   
        /// </summary>
        /// <param name="sourceString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <param name="startString" type="string">
        ///     <para>
        ///         
        ///     </para>
        /// </param>
        /// <returns>
        ///     A string value...
        /// </returns>
        public static string GetSubString(string sourceString, string startString)
        {
            try
            {
                int index = sourceString.ToUpper().IndexOf(startString);
                if (index > 0)
                {
                    return sourceString.Substring(index);
                }
                return sourceString;
            }
            catch
            {
                return "";
            }
        }

        public static string GetSubString(string sourceString, string beginRemovedString, string endRemovedString)
        {
            try
            {
                if (sourceString.IndexOf(beginRemovedString) != 0)
                    beginRemovedString = "";

                if (sourceString.LastIndexOf(endRemovedString, sourceString.Length - endRemovedString.Length) < 0)
                    endRemovedString = "";

                int startIndex = beginRemovedString.Length;
                int length = sourceString.Length - beginRemovedString.Length - endRemovedString.Length;
                if (length > 0)
                {
                    return sourceString.Substring(startIndex, length);
                }
                return sourceString;
            }
            catch
            {
                return sourceString; ;
            }
        }

        /// <summary>
        /// 按字节数取出字符串的长度
        /// </summary>
        /// <param name="strTmp">要计算的字符串</param>
        /// <returns>字符串的字节数</returns>
        public static int GetByteCount(string strTmp)
        {
            int intCharCount = 0;
            for (int i = 0; i < strTmp.Length; i++)
            {
                if (System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i, 1)) == 3)
                {
                    intCharCount = intCharCount + 2;
                }
                else
                {
                    intCharCount = intCharCount + 1;
                }
            }
            return intCharCount;
        }

        /// <summary>
        /// 按字节数要在字符串的位置
        /// </summary>
        /// <param name="intIns">字符串的位置</param>
        /// <param name="strTmp">要计算的字符串</param>
        /// <returns>字节的位置</returns>
        public static int GetByteIndex(int intIns, string strTmp)
        {
            int intReIns = 0;
            if (strTmp.Trim() == "")
            {
                return intIns;
            }
            for (int i = 0; i < strTmp.Length; i++)
            {
                if (System.Text.UTF8Encoding.UTF8.GetByteCount(strTmp.Substring(i, 1)) == 3)
                {
                    intReIns = intReIns + 2;
                }
                else
                {
                    intReIns = intReIns + 1;
                }
                if (intReIns >= intIns)
                {
                    intReIns = i + 1;
                    break;
                }
            }
            return intReIns;
        }
    }
}