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- using CnasSynchronousCommon;
- using System;
- using System.Collections.Generic;
- using System.Data;
- using System.IO;
- using System.Linq;
- using System.Text;
-
- namespace CnasSynchronusDAL
- {
- public class TXTDAL
- {
- /// <summary>
- /// 获取表名表结构
- /// </summary>
- public static DataTable ReadTxtFileColumn(string strFilePath,string strTxtFileMode)
- {
- DataTable dt = new DataTable();
- try
- {
- if (strTxtFileMode == "0" || strTxtFileMode == "1") //采用0号规则或1号规则读取数据
- {
- //根据路径打开文件,并获取文件第一行数据,如果第一行数据是列名,则返回这些列名,如果不是,则返回F1,F2...
- List<string> arryList = new List<string>();
- if (File.Exists(strFilePath))
- {
- FileStream fileStream = new FileStream(strFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
- StreamReader _StreamReaderKey = new StreamReader(fileStream, GetType(strFilePath));
- string strLine = "";
-
- /*这里只读取第一行数据*/
- strLine = _StreamReaderKey.ReadLine();
- arryList.Add(strLine);
-
- fileStream.Close();
- }
- if (arryList.Count >= 0)
- {
- string[] temp = arryList[0].Split('\t');
- if (strTxtFileMode == "0") //此时是文本模式1,此时第一行是数据列信息
- {
- for (int i = 0; i < temp.Length; i++)
- {
- dt.Columns.Add($"F{i + 1}");
- }
- }
- else if (strTxtFileMode == "1")//此时是文本模式2,此时第一行不是数据列信息,直接就是数据
- {
- foreach (string item in temp)
- {
- dt.Columns.Add(item);
- }
- }
- }
- }
- if (strTxtFileMode == "2") //此时是2号规则读取文件数据
- {
- dt = ReadFileSecond.ReadTableStructure();
- }
- if (strTxtFileMode == "3")
- {
- dt = ReadFileThird.ReadTableStructure();
- }
- if (strTxtFileMode == "4")
- {
- dt = ReadFileForth.ReadTableStructure();
- }
- if (strTxtFileMode == "5")
- {
- dt = ReadFileFifth.ReadTableStructure();
- }
- }
- catch (Exception ex)
- {
- AppLog.Error(ex.Message);
- }
- return dt;
- }
-
- public static DataTable ReadTxtFileData(string strFilePath, string strTxtFileMode)
- {
- DataTable dt = new DataTable();
- try
- {
- if (strTxtFileMode == "0" || strTxtFileMode == "1") //采用0号规则或1号规则读取数据
- {
- //根据路径打开文件,并获取文件第一行数据,如果第一行数据是列名,则返回这些列名,如果不是,则返回F1,F2...
- List<string> arryList = new List<string>();
- if (File.Exists(strFilePath))
- {
- FileStream fileStream = new FileStream(strFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
- StreamReader _StreamReaderKey = new StreamReader(fileStream, GetType(strFilePath));
- string strLine = "";
- while (!string.IsNullOrEmpty((strLine = _StreamReaderKey.ReadLine())))
- {
- arryList.Add(strLine);
- }
-
- fileStream.Close();
- }
- if (arryList.Count >= 0)
- {
- //1 .构建表结构
- string[] temp = arryList[0].Split('\t');
- if (strTxtFileMode == "0") //此时是文本模式1,此时第一行是数据列信息
- {
- for (int i = 0; i < temp.Length; i++)
- {
- dt.Columns.Add($"F{++i}");
- }
- }
- else if (strTxtFileMode == "1")//此时是文本模式2,此时第一行不是数据列信息,直接就是数据
- {
- foreach (string item in temp)
- {
- dt.Columns.Add(item);
- }
- }
- //插入表数据
- int index = 0;
- for (int j = 0; j < arryList.Count; j++)
- {
- if (strTxtFileMode == "1" && j == 0)
- continue;
- index = 0;
- DataRow drNew = dt.NewRow();
- temp = arryList[j].Split('\t');
- foreach (var item in temp)
- {
- drNew[index++] = item;
- }
- dt.Rows.Add(drNew);
- }
- }
- }
- if (strTxtFileMode == "2") //此时是2号规则读取文件数据
- {
- dt = ReadFileSecond.ReadTableData(strFilePath);
- }
- if (strTxtFileMode == "3")
- {
- dt = ReadFileThird.ReadTableData(strFilePath);
- }
- if (strTxtFileMode == "4")
- {
- dt = ReadFileForth.ReadTableData(strFilePath);
- }
- if (strTxtFileMode == "5")
- {
- dt = ReadFileFifth.ReadTableData(strFilePath);
- }
- }
- catch (Exception ex)
- {
- AppLog.Error(ex.Message);
- }
- return dt;
- }
-
-
- #region 得到文本的编码格式,避免因解析问题造成的乱码
-
- public static System.Text.Encoding GetType(string FILE_NAME)
- {
- FileStream fs = new FileStream(FILE_NAME, FileMode.Open, FileAccess.Read);
- Encoding r = GetType(fs);
- fs.Close();
- return r;
- }
-
- public static System.Text.Encoding GetType(FileStream fs)
- {
- byte[] Unicode = new byte[] { 0xFF, 0xFE, 0x41 };
- byte[] UnicodeBIG = new byte[] { 0xFE, 0xFF, 0x00 };
- byte[] UTF8 = new byte[] { 0xEF, 0xBB, 0xBF }; //带BOM
- Encoding reVal = Encoding.Default;
-
- BinaryReader r = new BinaryReader(fs, System.Text.Encoding.Default);
- int i;
- int.TryParse(fs.Length.ToString(), out i);
- byte[] ss = r.ReadBytes(i);
- if (IsUTF8Bytes(ss) || (ss[0] == 0xEF && ss[1] == 0xBB && ss[2] == 0xBF))
- {
- reVal = Encoding.UTF8;
- }
- else if (ss[0] == 0xFE && ss[1] == 0xFF && ss[2] == 0x00)
- {
- reVal = Encoding.BigEndianUnicode;
- }
- else if (ss[0] == 0xFF && ss[1] == 0xFE && ss[2] == 0x41)
- {
- reVal = Encoding.Unicode;
- }
- r.Close();
- return reVal;
-
- }
-
- private static bool IsUTF8Bytes(byte[] data)
- {
- int charByteCounter = 1; //计算当前正分析的字符应还有的字节数
- byte curByte; //当前分析的字节.
- for (int i = 0; i < data.Length; i++)
- {
- curByte = data[i];
- if (charByteCounter == 1)
- {
- if (curByte >= 0x80)
- {
- //判断当前
- while (((curByte <<= 1) & 0x80) != 0)
- {
- charByteCounter++;
- }
- //标记位首位若为非0 则至少以2个1开始 如:110XXXXX...........1111110X
- if (charByteCounter == 1 || charByteCounter > 6)
- {
- return false;
- }
- }
- }
- else
- {
- //若是UTF-8 此时第一位必须为1
- if ((curByte & 0xC0) != 0x80)
- {
- return false;
- }
- charByteCounter--;
- }
- }
- if (charByteCounter > 1)
- {
- throw new Exception("非预期的byte格式");
- }
- return true;
- }
- #endregion
- }
- }
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