using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using System.Data.OleDb;
using Microsoft.Win32;
using System.Runtime.InteropServices;
using Platform.Common.LogSystem;
using System.Security.Cryptography;

//add by wangfei 2012/12/14 16:00 
namespace TellerSystem.Library.Ext.TradeExtension
{
    /// <summary>
    /// 解析文件
    /// </summary>
    public class AnalyzeFile
    {
        #region 变量
        //文件路径
        private string path;
        //Excel的Sheet节点集合
        private List<string> listSheet;
        //Excel按照的版本
        private static string excelVerson;
        //编码方式
        private Encoding txt_EnCode;
        //行分隔符
        private char[] txt_LineSplit;
        //列分隔符
        private char txt_ColSplit;
        private StreamReader txt_FileStream = null;
        //文件流打开标志
        private bool m_OpenFlag = false;
        #endregion

        #region 方法
        /// <summary>
        /// 解析文本文件导入数据
        /// </summary>
        /// <param name="txt_RowSplit">行分隔符</param>
        /// <param name="txt_ColumnSlit">列分割符</param>
        /// <param name="txt_EnCode">编码方式</param>
        /// <param name="isColumnHeader">是否显示列头</param>
        /// <returns>返回一个DataTable</returns>
        public DataTable AnalyzeTxtData(char[] txt_RowSplit, char txt_ColumnSlit, string txt_EnCode, bool isColumnHeader = true)
        {
            DataTable dataTabel = null;
            m_OpenFlag = true;
            //匹配标志
            bool flag = false;
            //当前行数
            int rowCount = 0;
            List<string> lineData = new List<string>();
            if (txt_RowSplit == null)//分割符
            {
                return null;
            }
            if (txt_RowSplit.Length == 0)//行分割符
            {
                return null;
            }
            if (string.IsNullOrWhiteSpace(txt_ColumnSlit.ToString()))//列分割符
            {
                return null;
            }
            if (string.IsNullOrWhiteSpace(txt_EnCode))//编码方式
            {
                return null;
            }
            OpenFile(out path);

            //打开文件读取流
            if (!File.Exists(path))//文件不存在
            {
                return null;
            }
            this.txt_EnCode = Encoding.GetEncoding(txt_EnCode);
            //行分割符字符数组,当前只支持最大两个字符的分隔符           
            char[] tmpStrs = txt_RowSplit;
            byte[] lineByte = new byte[tmpStrs.Length];
            for (int k = 0; k < tmpStrs.Length; k++)
            {
                lineByte[k] = Convert.ToByte(Convert.ToInt32(tmpStrs[k]));
            }
            this.txt_LineSplit = this.txt_EnCode.GetChars(lineByte);

            //列分割符
            byte[] fieldByte = new byte[1];
            char[] fieldSplit = new char[1];
            fieldByte[0] = Convert.ToByte(Convert.ToInt32(txt_ColumnSlit));
            fieldSplit = this.txt_EnCode.GetChars(fieldByte);
            this.txt_ColSplit = fieldSplit[0];
            txt_FileStream = new StreamReader(path, this.txt_EnCode, true);
            char temp;
            StringBuilder rowData = new StringBuilder();
            int readCount = 0;
            //循环处理所有流数据
            while (!txt_FileStream.EndOfStream)
            {
                //当前处理字符
                temp = (char)txt_FileStream.Read();
                readCount++;
                //当前为第二个字符匹配时执行
                if (flag)
                {
                    //匹配不成功
                    if (temp != this.txt_LineSplit[1])
                    {
                        rowData.Append(this.txt_LineSplit[0]);
                        rowData.Append(temp);
                        flag = false;
                        //不是最后一个字符
                        if (!txt_FileStream.EndOfStream)
                        {
                            continue;
                        }
                    }
                    //匹配成功
                    else
                    {
                        flag = false;
                    }
                }
                else
                {
                    //第一个字符匹配成功设置匹配成功标志
                    if (temp == this.txt_LineSplit[0])
                    {
                        //两个字符的情况
                        if (this.txt_LineSplit.Length == 2)
                        {
                            flag = true;
                            //不是最后一个字符
                            if (!txt_FileStream.EndOfStream)
                            {
                                continue;
                            }
                            else
                            {
                                rowData.Append(temp);
                            }
                        }
                    }
                    //第一个匹配不成功时按正常数据处理
                    else
                    {
                        rowData.Append(temp);
                        flag = false;
                        //不是最后一个字符
                        if (!txt_FileStream.EndOfStream)
                        {
                            if (readCount > 100000)
                            {
                                throw new Exception("找到不到指定的行分割符");
                            }
                            continue;
                        }
                    }
                }
                lineData.Add(rowData.ToString());
                rowData.Clear();
                //设置当前行数
                rowCount += 1;
                //行读取字符个数 清零
                readCount = 0;
            }
            //第一行是否为字段名称
            DataTable data = new DataTable("Table_Sheet1");
            if (isColumnHeader)
            {
                //处理第一行数据位列头
                lineData[0].Split(this.txt_ColSplit).ToList().ForEach
                (
                 s =>
                 {
                     data.Columns.Add(s.Trim());

                 });
                lineData.Remove(lineData[0]);
                for (int i = 0; i < lineData.Count; i++)
                {
                    DataRow dr = data.NewRow();
                    var _s = lineData[i].Split(this.txt_ColSplit);
                    for (int j = 0; j < _s.Count(); j++)
                    {
                        dr[j] = _s[j].ToString();
                    }
                    data.Rows.Add(dr);//在表中添加数据
                }
            }
            else
            {
                //处理第一行数据位列头
                for (int i = 0; i < lineData[0].Split(this.txt_ColSplit).ToList().Count; i++)
                {
                    data.Columns.Add("col" + i);
                }
                for (int i = 0; i < lineData.Count; i++)
                {
                    DataRow dr = data.NewRow();
                    var _s = lineData[i].Split(this.txt_ColSplit);
                    for (int j = 0; j < _s.Count(); j++)
                    {
                        if (j >= data.Columns.Count)
                        {
                            data.Columns.Add("col" + j);
                        }
                        dr[j] = _s[j].ToString();
                    }
                    data.Rows.Add(dr);//在表中添加数据
                }
            }
            dataTabel = data;
            return dataTabel;
        }


        /// <summary>
        /// 解析文本文件导入数据
        /// </summary>
        /// <param name="txt_RowSplit">行分隔符</param>
        /// <param name="txt_ColumnSlit">列分割符</param>
        /// <param name="txt_EnCode">编码方式</param>
        /// <param name="isColumnHeader">是否显示列头</param>
        /// <returns>返回一个DataTable</returns>
        public List<DataTable> AnalyzeTxtData(bool multiSelect, char[] txt_RowSplit, char txt_ColumnSlit, string txt_EnCode, bool isColumnHeader = true)
        {
            List<DataTable> tableList = new List<DataTable>();
            m_OpenFlag = true;
            //匹配标志
            bool flag = false;
            //当前行数
            int rowCount = 0;
            List<string> lineData = new List<string>();
            if (txt_RowSplit == null)//分割符
            {
                return null;
            }
            if (txt_RowSplit.Length == 0)//行分割符
            {
                return null;
            }
            if (string.IsNullOrWhiteSpace(txt_EnCode))//编码方式s
            {
                return null;
            }
            OpenFile(multiSelect, out path);
            if (!string.IsNullOrEmpty(path))
            {
                StringReader reader = new StringReader(path);
                string tempPath = reader.ReadLine();
                while (tempPath != null)
                {
                    if (!File.Exists(tempPath))//文件不存在
                    {
                        return null;
                    }
                    lineData.Clear();
                    this.txt_EnCode = Encoding.GetEncoding(txt_EnCode);
                    //行分割符字符数组,当前只支持最大两个字符的分隔符           
                    char[] tmpStrs = txt_RowSplit;
                    byte[] lineByte = new byte[tmpStrs.Length];
                    for (int k = 0; k < tmpStrs.Length; k++)
                    {
                        lineByte[k] = Convert.ToByte(Convert.ToInt32(tmpStrs[k]));
                    }
                    this.txt_LineSplit = this.txt_EnCode.GetChars(lineByte);

                    //列分割符
                    byte[] fieldByte = new byte[1];
                    char[] fieldSplit = new char[1];
                    fieldByte[0] = Convert.ToByte(Convert.ToInt32(txt_ColumnSlit));
                    fieldSplit = this.txt_EnCode.GetChars(fieldByte);
                    this.txt_ColSplit = fieldSplit[0];
                    txt_FileStream = new StreamReader(tempPath, this.txt_EnCode, true);
                    char temp;
                    StringBuilder rowData = new StringBuilder();
                    int readCount = 0;
                    //循环处理所有流数据
                    while (!txt_FileStream.EndOfStream)
                    {
                        //当前处理字符
                        temp = (char)txt_FileStream.Read();
                        readCount++;
                        //当前为第二个字符匹配时执行
                        if (flag)
                        {
                            //匹配不成功
                            if (temp != this.txt_LineSplit[1])
                            {
                                rowData.Append(this.txt_LineSplit[0]);
                                rowData.Append(temp);
                                flag = false;
                                //不是最后一个字符
                                if (!txt_FileStream.EndOfStream)
                                {
                                    continue;
                                }
                            }
                            //匹配成功
                            else
                            {
                                flag = false;
                            }
                        }
                        else
                        {
                            //第一个字符匹配成功设置匹配成功标志
                            if (temp == this.txt_LineSplit[0])
                            {
                                //两个字符的情况
                                if (this.txt_LineSplit.Length == 2)
                                {
                                    flag = true;
                                    //不是最后一个字符
                                    if (!txt_FileStream.EndOfStream)
                                    {
                                        continue;
                                    }
                                    else
                                    {
                                        rowData.Append(temp);
                                    }
                                }
                            }
                            //第一个匹配不成功时按正常数据处理
                            else
                            {
                                rowData.Append(temp);
                                flag = false;
                                //不是最后一个字符
                                if (!txt_FileStream.EndOfStream)
                                {
                                    if (readCount > 100000)
                                    {
                                        throw new Exception("找到不到指定的行分割符");
                                    }
                                    continue;
                                }
                            }
                        }
                        lineData.Add(rowData.ToString());
                        rowData.Clear();
                        //设置当前行数
                        rowCount += 1;
                        //行读取字符个数 清零
                        readCount = 0;
                    }
                    //第一行是否为字段名称
                    DataTable data = new DataTable("Table_Sheet1");
                    if (isColumnHeader)
                    {
                        //处理第一行数据位列头
                        lineData[0].Split(this.txt_ColSplit).ToList().ForEach
                        (
                         s =>
                         {
                             data.Columns.Add(s.Trim());

                         });
                        lineData.Remove(lineData[0]);
                        for (int i = 0; i < lineData.Count; i++)
                        {
                            DataRow dr = data.NewRow();
                            var _s = lineData[i].Split(this.txt_ColSplit);
                            for (int j = 0; j < _s.Count(); j++)
                            {
                                dr[j] = _s[j].ToString();
                            }
                            data.Rows.Add(dr);//在表中添加数据
                        }
                    }
                    else
                    {
                        //处理第一行数据位列头
                        for (int i = 0; i < lineData[0].Split(this.txt_ColSplit).ToList().Count; i++)
                        {
                            data.Columns.Add("col" + i);
                        }
                        for (int i = 0; i < lineData.Count; i++)
                        {
                            DataRow dr = data.NewRow();
                            var _s = lineData[i].Split(this.txt_ColSplit);
                            for (int j = 0; j < _s.Count(); j++)
                            {
                                if (j >= data.Columns.Count)
                                {
                                    data.Columns.Add("col" + j);
                                }
                                dr[j] = _s[j].ToString();
                            }
                            data.Rows.Add(dr);//在表中添加数据
                        }
                    }
                    data.TableName = tempPath.Substring(tempPath.LastIndexOf('\\') + 1);
                    tableList.Add(data);
                    tempPath = reader.ReadLine();
                }
            }
            return tableList;
        }

        #region 代付业务解密文件的方法
        private const int BUFFER_SIZE = 128 * 1024;
        private const ulong FC_TAG = 0xFC010203040506CF;
        /// <summary> 
        /// 
        /// </summary> 
        /// <param name="password">密码</param> 
        /// <param name="salt"></param> 
        /// <returns>加密对象</returns> 
        private static SymmetricAlgorithm CreateRijndael(string password, byte[] salt)
        {
            PasswordDeriveBytes pdb = new PasswordDeriveBytes(password, salt, "SHA256", 1000);
            SymmetricAlgorithm sma = Rijndael.Create();
            sma.KeySize = 256;
            sma.Key = pdb.GetBytes(32);
            sma.Padding = PaddingMode.PKCS7;
            return sma;
        }
        /// <summary> 
        /// 检验两个Byte数组是否相同 
        /// </summary> 
        /// <param name="b1">Byte数组</param> 
        /// <param name="b2">Byte数组</param> 
        /// <returns>true－相等</returns> 
        private static bool CheckByteArrays(byte[] b1, byte[] b2)
        {
            if (b1.Length == b2.Length)
            {
                for (int i = 0; i < b1.Length; ++i)
                {
                    if (b1[i] != b2[i])
                        return false;
                }
                return true;
            }
            return false;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        private DataSet EcxelToDataSet(string filePath)
        {
            this.CheckExcelVersion(out excelVerson);//检查Excel版本
            this.GetSheets(out listSheet, filePath);    //获取Excel的Sheet节点

            string connString = ExcelConnString(excelVerson, filePath); //连接字符串
            OleDbConnection OleConn = new OleDbConnection(connString);    //连接Excel  
            string sql = " SELECT * FROM  [" + listSheet.FirstOrDefault() + "]";
            DataSet data = new DataSet();
            try
            {
                //打开连接
                OleConn.Open();
                //执行查询
                OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, OleConn);
                OleDaExcel.Fill(data, "Sheet1");

                //关闭连接
                OleConn.Close();
            }
            catch (Exception ex)
            {
                //关闭连接
                PlatformLogger.SystemErrorInfo("解析Excel文件发生异常：", ex);
                OleConn.Close();
            }
            return data;
        }

        /// <summary>
        /// 解析加密过的Excel文件
        /// </summary>
        /// <param name="password"></param>
        /// <returns></returns>
        public DataTable AnalyseEncryptExcelData(string password, ref string fileID)
        {
            DataTable dataTable = new DataTable();

            this.OpenFile(out path, "Files|*.txt;"); //打开文件提示框
            if (string.IsNullOrEmpty(path)) return dataTable;
            //去掉前100字节的明文信息
            byte[] data = File.ReadAllBytes(path);
            string newfile = path.Substring(0, path.Length - 4);
            //获取文件唯一ID
            byte[] guidB = new byte[32];
            Array.Copy(data, 100, guidB, 0, 32);
            fileID = Encoding.Default.GetString(guidB);

            FileStream foutN = File.OpenWrite(newfile);
            foutN.Write(data, 132, data.Length - 132);
            foutN.Close();
            var outimp = path.Substring(0, path.LastIndexOf(".")) + ".xlsx";

            using (FileStream fin = File.OpenRead(newfile), fout = File.OpenWrite(outimp))
            {
                int size = (int)fin.Length;
                byte[] bytes = new byte[BUFFER_SIZE];
                int read = -1;
                int value = 0;
                int outValue = 0;
                byte[] IV = new byte[16];
                fin.Read(IV, 0, 16);
                byte[] salt = new byte[16];
                fin.Read(salt, 0, 16);
                SymmetricAlgorithm sma = CreateRijndael(password, salt);
                sma.IV = IV;
                value = 32;
                long lSize = -1;
                // 创建散列对象, 校验文件 
                HashAlgorithm hasher = SHA256.Create();
                using (CryptoStream cin = new CryptoStream(fin, sma.CreateDecryptor(), CryptoStreamMode.Read),
                chash = new CryptoStream(Stream.Null, hasher, CryptoStreamMode.Write))
                {
                    // 读取文件长度 
                    BinaryReader br = new BinaryReader(cin, Encoding.UTF8);
                    lSize = br.ReadInt64();
                    ulong tag = br.ReadUInt64();
                    if (FC_TAG != tag)
                        return dataTable;
                    long numReads = lSize / BUFFER_SIZE;
                    long slack = (long)lSize % BUFFER_SIZE;
                    for (int i = 0; i < numReads; ++i)
                    {
                        read = cin.Read(bytes, 0, bytes.Length);
                        fout.Write(bytes, 0, read);
                        chash.Write(bytes, 0, read);
                        value += read;
                        outValue += read;
                    }
                    if (slack > 0)
                    {
                        read = cin.Read(bytes, 0, (int)slack);
                        fout.Write(bytes, 0, read);
                        chash.Write(bytes, 0, read);
                        value += read;
                        outValue += read;
                    }
                    chash.Flush();
                    chash.Close();
                    fout.Flush();
                    fout.Close();
                    byte[] curHash = hasher.Hash;
                    // 获取比较和旧的散列对象 
                    byte[] oldHash = new byte[hasher.HashSize / 8];
                    read = cin.Read(oldHash, 0, oldHash.Length);
                    if ((oldHash.Length != read) || (!CheckByteArrays(oldHash, curHash)))
                        return dataTable;
                }
                if (outValue != lSize)
                    return dataTable;
            }
            dataTable = EcxelToDataSet(outimp).Tables[0];
            File.Delete(outimp);
            //删除表中的所有空行,删除
            if (dataTable != null)
            {
                bool canDel;
                for (int i = 0; i < dataTable.Rows.Count; i++)
                {
                    canDel = true;
                    for (int j = 0; j < dataTable.Columns.Count; j++)
                    {
                        if (dataTable.Rows[i][j].ToString().Trim() == string.Empty)
                        {
                        }
                        else
                        {
                            canDel = false;
                            dataTable.Rows[i][j] = dataTable.Rows[i][j].ToString().Replace("　", "").Replace(" ", "");
                        }
                    }
                    if (canDel)
                    {
                        dataTable.Rows[i].Delete();
                    }
                }
                dataTable.AcceptChanges();
            }
            //删除新建文件
            File.Delete(newfile);
            return dataTable;
        }
        #endregion

        /// <summary>
        /// 解析Excel文件导入的数据
        /// </summary>
        /// <param name="RowCount">可选参数 RowCount=0-默认解析全部行</param>
        /// <param name="columnCount">可选参数 ColumnCount=0-默认解析全部列</param>
        /// <returns>返回DataTable</returns>
        public DataTable AnalyseExcelData(int RowCount = 0, int columnCount = 0)
        {
            DataTable dataTable = null;
            this.OpenFile(out path, "Excel Files|*.xlsx;*.xls;"); //打开文件提示框
            this.CheckExcelVersion(out excelVerson);//检查Excel版本
            this.GetSheets(out listSheet);    //获取Excel的Sheet节点
            if (path != null && path.Trim().Length > 0)
            {
                string connString = ExcelConnString(excelVerson, path); //连接字符串
                OleDbConnection OleConn = new OleDbConnection(connString);    //连接Excel  
                string sql = " SELECT * FROM  [" + listSheet.FirstOrDefault() + "$]";//查询字符串
                DataSet data = new DataSet();
                try
                {
                    //打开连接
                    OleConn.Open();
                    //执行查询
                    OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, OleConn);
                    OleDaExcel.Fill(data, "Sheet1");
                    dataTable = data.Tables[0];
                    dataTable.TableName = path.Substring(path.LastIndexOf('\\') + 1);
                    if (RowCount > 0 && columnCount > 0)
                    {
                        DataTable dt = new DataTable(dataTable.TableName);
                        DataColumnCollection colums = data.Tables[0].Columns;
                        //处理第一行数据 
                        for (int i = 0; i < columnCount; i++)
                        {
                            dt.Columns.Add(colums[i].ToString());
                        }
                        for (int i = 0; i < RowCount; i++)
                        {
                            DataRow dr = dt.NewRow();
                            for (int j = 0; j < columnCount; j++)
                            {
                                dr[j] = dataTable.Rows[i][j].ToString();
                            }
                            dt.Rows.Add(dr);//想表中添加数据
                        }
                        dataTable = null;
                        dataTable = dt;
                    }
                    //关闭连接
                    OleConn.Close();
                }
                catch (Exception ex)
                {
                    //关闭连接
                    PlatformLogger.SystemErrorInfo("解析Excel文件发生异常：", ex);
                    OleConn.Close();
                    //写错误日志

                }
            }
            //删除表中的所有空行
            //if (dataTable != null)
            //{
            //    bool canDel = false;
            //    for (int i = 0; i < dataTable.Rows.Count; i++)
            //    {
            //        for (int j = 0; j < dataTable.Columns.Count; j++)
            //        {
            //            if (dataTable.Rows[i][j].ToString() == string.Empty)
            //            {
            //                canDel = true;
            //            }
            //            else
            //            {
            //                canDel = false;
            //                break;
            //            }
            //        }
            //        if (canDel)
            //        {
            //            dataTable.Rows[i].Delete();
            //        }
            //    }
            //    dataTable.AcceptChanges();
            //}
            //删除表中的所有空行,删除
            if (dataTable != null)
            {
                bool canDel;
                for (int i = 0; i < dataTable.Rows.Count; i++)
                {
                    canDel = true;
                    for (int j = 0; j < dataTable.Columns.Count; j++)
                    {
                        if (dataTable.Rows[i][j].ToString().Trim() == string.Empty)
                        {
                        }
                        else
                        {
                            canDel = false;
                            dataTable.Rows[i][j] = dataTable.Rows[i][j].ToString().Replace("　", "").Replace(" ", "");
                        }
                    }
                    if (canDel)
                    {
                        dataTable.Rows[i].Delete();
                    }
                }
                dataTable.AcceptChanges();
            }
            return dataTable;
        }
        #endregion

        #region 私有方法
        /// <summary>
        /// 取得Excel文件的所有信息
        /// </summary>
        /// <param name="outSheets">返回所有Sheet信息</param>
        private void GetSheets(out List<string> outSheets)
        {
            //连接字符串
            string connString = ExcelConnString(excelVerson, path);
            DataTable tableInfo;
            List<string> oList = new List<string>();
            string tmpstr = "";
            try
            {
                OleDbConnection objConn = new OleDbConnection(connString);
                //打开连接
                objConn.Open();
                tableInfo = objConn.GetSchema("TABLES");
                //处理所有SHEET信息
                for (int i = 0; i < tableInfo.Rows.Count; i++)
                {
                    tmpstr = tableInfo.Rows[i]["TABLE_NAME"].ToString();
                    if (tmpstr.LastIndexOf('$') == tmpstr.Length - 1)
                    {
                        oList.Add(tmpstr.Trim().TrimEnd('$'));
                    }
                }
                //关闭连接
                objConn.Close();
            }
            catch (Exception ex)
            {
                PlatformLogger.SystemErrorInfo("解析Excel文件发生异常：", ex);
                //写错误日志
            }
            //返回值
            outSheets = oList;
        }

        /// <summary>
        /// 取得Excel文件的所有信息
        /// </summary>
        /// <param name="outSheets">返回所有Sheet信息</param>
        private void GetSheets(out List<string> outSheets, string path)
        {
            //连接字符串
            string connString = ExcelConnString(excelVerson, path);
            DataTable tableInfo;
            List<string> oList = new List<string>();
            string tmpstr = "";
            try
            {
                OleDbConnection objConn = new OleDbConnection(connString);
                //打开连接
                objConn.Open();
                tableInfo = objConn.GetSchema("TABLES");
                //处理所有SHEET信息
                for (int i = 0; i < tableInfo.Rows.Count; i++)
                {
                    tmpstr = tableInfo.Rows[i]["TABLE_NAME"].ToString();
                    //这种判断方式是错误的，因为sheet页标签的名字很可能是全数字,解析的结果就是数字+$+’
                    //if (tmpstr.LastIndexOf('$') == tmpstr.Length - 1)
                    //{
                    //    oList.Add(tmpstr.Trim().TrimEnd('$'));
                    //}
                    oList.Add(tmpstr);
                }
                //关闭连接
                objConn.Close();
            }
            catch (Exception ex)
            {
                PlatformLogger.SystemErrorInfo("解析Excel文件发生异常：", ex);
                //写错误日志
            }
            //返回值
            outSheets = oList;
        }
        /// <summary>
        /// 检查本地Excel版本
        /// </summary>
        /// <returns>Excel版本号</returns>
        private string CheckExcelVersion(out string ExcelVersion)
        {
            ExcelVersion = string.Empty;
            string path03 = string.Empty;
            string path07 = string.Empty;
            string path10 = string.Empty;
            string path13 = string.Empty;
            if (Environment.Is64BitOperatingSystem) //64位系统
            {
                path03 = Get64BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\11.0\\Excel\\InstallRoot\\", "Path");
                if (string.IsNullOrEmpty(path03)) //如果未取到，可能是64系统装的32位office，需取32位注册表
                {
                    path03 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\11.0\\Excel\\InstallRoot\\", "Path");
                }
                path07 = Get64BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\12.0\\Excel\\InstallRoot\\", "Path");
                if (string.IsNullOrEmpty(path07))//如果未取到，可能是64系统装的32位office，需取32位注册表
                {
                    path07 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\12.0\\Excel\\InstallRoot\\", "Path");
                }
                path10 = Get64BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\14.0\\Excel\\InstallRoot\\", "Path");
                if (string.IsNullOrEmpty(path10))//如果未取到，可能是64系统装的32位office，需取32位注册表
                {
                    path10 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\14.0\\Excel\\InstallRoot\\", "Path");
                }
                path13 = Get64BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\15.0\\Excel\\InstallRoot\\", "Path");
                if (string.IsNullOrEmpty(path13))//如果未取到，可能是64系统装的32位office，需取32位注册表
                {
                    path13 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\15.0\\Excel\\InstallRoot\\", "Path");
                }
            }
            else //32位系统
            {
                path03 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\11.0\\Excel\\InstallRoot\\", "Path");
                path07 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\12.0\\Excel\\InstallRoot\\", "Path");
                path10 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\14.0\\Excel\\InstallRoot\\", "Path");
                path13 = Get32BitRegistryKey(@"SOFTWARE\\Microsoft\\Office\\15.0\\Excel\\InstallRoot\\", "Path");
            }
            //检查本机是否安装Office2003
            if (File.Exists(path03 + "EXCEL.exe"))
            {
                ExcelVersion = "8.0";
            }

            //检查本机是否安装Office2007

            if (File.Exists(path07 + "EXCEL.exe"))
            {
                ExcelVersion = "12.0";
            }
            //检查本机是否安装Office2010

            if (File.Exists(path10 + "EXCEL.exe"))
            {
                ExcelVersion = "12.0";
            }
            //检查本机是否安装Office2013

            if (File.Exists(path13 + "EXCEL.exe"))
            {
                ExcelVersion = "12.0";
            }
            //如果在注册表中找不到安装目录，设置初始值
            if (string.IsNullOrEmpty(ExcelVersion))
            {
                ExcelVersion = "12.0";
            }
            return ExcelVersion;
        }
        #region 32位程序读取64位系统注册表（HKEY_LOCAL_MACHINE目录）

        // 关闭64位（文件系统）的操作转向
        [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool Wow64DisableWow64FsRedirection(ref IntPtr ptr);
        // 开启64位（文件系统）的操作转向
        [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool Wow64RevertWow64FsRedirection(IntPtr ptr);

        // 获取操作Key值句柄
        [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern uint RegOpenKeyEx(UIntPtr hKey, string lpSubKey, uint ulOptions,
                                int samDesired, out IntPtr phkResult);
        //关闭注册表转向（禁用特定项的注册表反射）
        [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern long RegDisableReflectionKey(IntPtr hKey);
        //使能注册表转向（开启特定项的注册表反射）
        [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern long RegEnableReflectionKey(IntPtr hKey);
        //获取Key值（即：Key值句柄所标志的Key对象的值）
        [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern int RegQueryValueEx(IntPtr hKey, string lpValueName, int lpReserved,
                                                  out uint lpType, System.Text.StringBuilder lpData,
                                                  ref uint lpcbData);
        private string Get64BitRegistryKey(string subKeyName, string keyName)
        {
            int KEY_QUERY_VALUE = (0x0001);
            int KEY_WOW64_64KEY = (0x0100);
            int KEY_ALL_WOW64 = (KEY_QUERY_VALUE | KEY_WOW64_64KEY);
            try
            {
                //将Windows注册表主键名转化成为不带正负号的整形句柄（与平台是32或者64位有关）
                UIntPtr hKey = (UIntPtr)0x80000002;
                //声明将要获取Key值的句柄
                IntPtr pHKey = IntPtr.Zero;
                //记录读取到的Key值
                StringBuilder result = new StringBuilder(1024);
                uint resultSize = 1024;
                uint lpType = 0;
                //关闭文件系统转向 
                IntPtr oldWOW64State = new IntPtr();
                if (Wow64DisableWow64FsRedirection(ref oldWOW64State))
                {
                    //获得操作Key值的句柄
                    RegOpenKeyEx(hKey, subKeyName, 0, KEY_ALL_WOW64, out pHKey);

                    //关闭注册表转向（禁止特定项的注册表反射）
                    RegDisableReflectionKey(pHKey);

                    //获取访问的Key值
                    RegQueryValueEx(pHKey, keyName, 0, out lpType, result, ref resultSize);

                    //打开注册表转向（开启特定项的注册表反射）
                    RegEnableReflectionKey(pHKey);
                }
                //打开文件系统转向
                Wow64RevertWow64FsRedirection(oldWOW64State);
                //返回Key值
                return result.ToString().Trim();
            }
            catch (Exception ex)
            {
                //写错误日志
                PlatformLogger.SystemErrorInfo("解析Excel文件发生异常：", ex);
                return string.Empty;
            }
        }

        #endregion
        #region 32位程序读取32位系统注册表（HKEY_LOCAL_MACHINE目录）
        private string Get32BitRegistryKey(string subKeyName, string keyName)
        {
            string result = string.Empty;
            RegistryKey rk = Registry.LocalMachine;
            RegistryKey key = rk.OpenSubKey(subKeyName);
            if (key != null)
            {
                result = key.GetValue(keyName).ToString();
            }
            return result;
        }
        #endregion




        /// <summary>
        /// 连接Excel的字符串
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns>连接Excel的字符串</returns>
        private string ExcelConnString(string excelVerson, string filePath)
        {
            string _excelConnString = "";
            if (excelVerson == "8.0")
            {
                _excelConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=Yes'";
            }
            if (excelVerson == "12.0")
            {
                _excelConnString = "Provider=Microsoft.Ace.OleDb.12.0;Data Source=" + filePath + ";Extended Properties='Excel 12.0;HDR=Yes'";
            }
            return _excelConnString;
        }

        /// <summary>
        /// 调用Win32打开提示框，选择文件
        /// </summary>
        /// <param name="path">返回文件的路径</param>
        /// <param name="filter">提示框可选择文件的后缀</param>
        private void OpenFile(out string path, string filter = "txt Files|*.txt")
        {
            path = "";
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Title = "上传文件";
            fileDialog.FileName = String.Empty;
            fileDialog.Filter = filter;
            fileDialog.Multiselect = false;
            if (fileDialog.ShowDialog() == true)
            {
                path = fileDialog.FileName;
            }
        }

        /// <summary>
        /// 调用Win32打开提示框，选择文件(支持多选)
        /// </summary>
        /// <param name="path">返回文件的路径</param>
        /// <param name="filter">提示框可选择文件的后缀</param>
        private void OpenFile(bool multiSelect, out string path, string filter = "txt Files|*.txt")
        {
            path = "";
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Title = "上传文件";
            fileDialog.FileName = String.Empty;
            fileDialog.Filter = filter;
            fileDialog.Multiselect = multiSelect;
            if (fileDialog.ShowDialog() == true)
            {
                StringBuilder builder = new StringBuilder();
                if (fileDialog.FileNames != null)
                {
                    for (int i = 0; i < fileDialog.FileNames.Length; i++)
                    {
                        builder.AppendLine(fileDialog.FileNames[i]);
                    }
                    path = builder.ToString();
                }
            }
        }
        #endregion

    }
}