using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace QM.Common
{
    ///<summary>
    /// 模块编号：QM.Common.FuncString
    /// 作    用：共通字符串处理函数
    /// 作    者：
    /// 编写日期：2014-05-05
    ///</summary>
    
    public class FuncString
    {

        #region 字符串验证
        /// <summary>
        /// 修改特殊字符
        /// </summary>
        /// <param name="pString">要替换的字符串</param>
        /// <returns></returns>
        public static string CheckStr(string pString)
        {
            #region

            if (pString == null)
            {
                return "";
            }

            return pString.Replace("'", "''");
            
            #endregion
        }


        /// <summary>
        /// 恢复特殊字符
        /// </summary>
        /// <param name="pString">要替换的字符串</param>
        /// <returns></returns>
        public static string UnCheckStr(string pString)
        {
            #region

            if (pString == null)
            {
                return "";
            }

            return pString.Replace("''", "'");

            #endregion
        }

        /// <summary>
        /// 过滤特殊字符
        /// "'.\r\n"
        /// </summary>
        /// <param name="pString">要替换的字符串</param>
        /// <returns></returns>
        public static string FilterStr(string pString)
        {
            return pString.Replace("'", " ").Replace(".", "").Replace("\r\n", "　");
        }

        #endregion

        #region 字符串截取
        /// <summary>
        /// 截取字符串函数
        /// </summary>
        /// <param name="pString">所要截取的字符串</param>
        /// <param name="pStartIndex">启始位置</param>
        /// <returns></returns>
        public static string GetSubString(string pString, int pStartIndex)
        {
            #region

            return (pString.Length > pStartIndex) ? pString.Substring(pStartIndex) : pString;

            #endregion
        }

        /// <summary>
        /// 截取字符串函数
        /// </summary>
        /// <param name="pString">所要截取的字符串</param>
        /// <param name="pStartIndex">启始位置</param>
        /// <param name="pNum">截取字符串的长度</param>
        /// <returns></returns>
        public static string GetSubString(string pString, int pStartIndex, int pNum)
        { 
            #region

            return (pString.Length > pStartIndex) ? pString.Substring(pStartIndex, pNum) : pString;

            #endregion
        }

        #endregion

        #region 替换　组合

        /// <summary>
        /// 按字符串位数补0
        /// </summary>
        /// <param name="pString">字符串</param>
        /// <param name="pStringLen">返回字符长度</param>
        /// <returns></returns>
        public static string FillZero(string pString, int pStringLen)
        {
            #region
            if (pString.Length < pStringLen)
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < pStringLen - pString.Length; i++)
                {
                    sb.Append("0");
                }
                sb.Append(pString);
                return sb.ToString();
            }
            else
            {
                return pString;
            }
            #endregion
        }

        /// <summary>
        /// 数值按指定位数补0
        /// </summary>
        /// <param name="pValue">整型数值</param>
        /// <param name="pStringLen">返回字符长度</param>
        /// <returns></returns>
        public static string FillZero(int pValue, int pStringLen)
        {
            #region

            string strTemp = pValue.ToString();

            if (strTemp.Length < pStringLen)
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < pStringLen - strTemp.Length; i++)
                {
                    sb.Append("0");
                }
                sb.Append(strTemp);
                return sb.ToString();
            }
            else
            {
                return strTemp;
            }
            #endregion
        }

        
        /// <summary>
        /// 生成指定长度的字符串,即生成strLong个str字符串
        /// </summary>
        /// <param name="pLong">生成的长度</param>
        /// <param name="pString">以pString生成字符串</param>
        /// <returns></returns>
        public static string StringOfChar(int pLong, string pString)
        {
            #region
            string ReturnStr = string.Empty;

            for (int i = 0; i < pLong; i++)
            {
                ReturnStr += pString;
            }
            return ReturnStr;
            #endregion
        }

        /// <summary>
        /// 将 Stream 转化成 string
        /// </summary>
        /// <param name="pStream"></param>
        /// <returns></returns>
        public static string ConvertStreamToString(Stream pStream)
        {
            #region
            string strResult = "";
            StreamReader sr = new StreamReader(pStream, Encoding.UTF8);

            Char[] read = new Char[256];

            // Read 256 charcters at a time.    
            int count = sr.Read(read, 0, 256);

            while (count > 0)
            {
                // Dump the 256 characters on a string and display the string onto the console.
                string str = new String(read, 0, count);
                strResult += str;
                count = sr.Read(read, 0, 256);
            }


            // 释放资源
            sr.Close();

            return strResult;
            #endregion
        }

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

        /// <summary>
        /// 分隔字符串
        /// </summary>
        /// <param name="pSplitString">要分隔的字符串</param>
        /// <param name="pSplitFlag">分隔标识</param>
        /// <returns></returns>
        public static string[] StringSplit(string pSplitString, string pSplitFlag)
        {
            #region
            return pSplitString.Split(new string[] { pSplitFlag }, StringSplitOptions.RemoveEmptyEntries);
            #endregion
        }
        #endregion

        #region 中文　处理
        /// <summary>
        /// 获取汉字第一个拼音
        /// </summary>
        /// <param name="pInpString"></param>
        /// <returns></returns>
        public static string getSpells(string pInpString)
        {
            #region

            int intLen = pInpString.Length;
            string strVal = "";

            for (int intCnt = 0; intCnt < intLen; intCnt++)
            {
                strVal += getSpell(pInpString.Substring(intCnt, 1));
            }

            return strVal;

            #endregion
        }

        /// <summary>
        ///  获取汉字第一个拼音中使用
        /// </summary>
        /// <param name="pCnString"></param>
        /// <returns></returns>
        public static string getSpell(string pCnString)
        {
            #region

            byte[] bytArrCN = Encoding.Default.GetBytes(pCnString);

            if (bytArrCN.Length > 1)
            {
                int intArea = (short)bytArrCN[0];
                int intPos = (short)bytArrCN[1];
                int code = (intArea << 8) + intPos;
                int[] intArrAreaCode = { 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 intCnt = 0; intCnt < 26; intCnt++)
                {
                    int intMax = 55290;

                    if (intCnt != 25)
                    {
                        intMax = intArrAreaCode[intCnt + 1];
                    }

                    if (intArrAreaCode[intCnt] <= code && code < intMax)
                    {
                        return Encoding.Default.GetString(new byte[] { (byte)(65 + intCnt) });
                    }
                }

                return "?";

            }
            else
            {
                return pCnString;
            }

            #endregion
        }


        /// <summary>
        /// 半角转全角
        /// </summary>
        /// <param name="pBJString"></param>
        /// <returns></returns>
        public static string GetQuanJiao(string pBJString)
        {
            #region

            char[] chrArrBJStr = pBJString.ToCharArray();

            for (int intCnt = 0; intCnt < chrArrBJStr.Length; intCnt++)
            {
                byte[] bytArrEn = System.Text.Encoding.Unicode.GetBytes(chrArrBJStr, intCnt, 1);

                if (bytArrEn.Length == 2)
                {
                    if (bytArrEn[1] == 0)
                    {
                        bytArrEn[0] = (byte)(bytArrEn[0] - 32);
                        bytArrEn[1] = 255;
                        chrArrBJStr[intCnt] = System.Text.Encoding.Unicode.GetChars(bytArrEn)[0];
                    }
                }
            }

            string strNew = new string(chrArrBJStr);

            return strNew;

            #endregion
        }

        /// <summary>
        /// 全角转半角
        /// </summary>
        /// <param name="pQJString"></param>
        /// <returns></returns>
        public static string GetBanJiao(string pQJString)
        {
            #region

            char[] chrArrQJ = pQJString.ToCharArray();

            for (int intCnt = 0; intCnt < chrArrQJ.Length; intCnt++)
            {
                byte[] bytArrEn = System.Text.Encoding.Unicode.GetBytes(chrArrQJ, intCnt, 1);

                if (bytArrEn.Length == 2)
                {
                    if (bytArrEn[1] == 255)
                    {
                        bytArrEn[0] = (byte)(bytArrEn[0] + 32);
                        bytArrEn[1] = 0;
                        chrArrQJ[intCnt] = System.Text.Encoding.Unicode.GetChars(bytArrEn)[0];
                    }
                }
            }

            string strNew = new string(chrArrQJ);

            return strNew;

            #endregion
        }

        #endregion
    }
}