文本文件txt生成excel

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data.OleDb;
using System.Data;
using System.Windows.Forms;
using NPOI;
using NPOI.Util;
using NPOI.HPSF;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;
using NPOI.HSSF;
using NPOI.HSSF.Util;
using NPOI.SS.Util;

namespace CSManager.Class
{
   public  class TxtToShp
    {         
        public TxtToShp()
        {
        }


        public static void addText(string filepath, string outPath)
        {
            var reader = new StreamReader(filepath);
            var list = new List<string[]>();
            int count = 0;
            string[,] M = null;
            //读取第一行属性行
            var line = reader.ReadLine().Split(new[] { "\t" }, StringSplitOptions.RemoveEmptyEntries);
            var arr = new string[line.Length];
            for (var O = 0; O < line.Length; O++) arr[O] = line[O];
            list.Add(arr);
            while (!reader.EndOfStream)
            {
                count++;
                var line1 = reader.ReadLine().Split(new[] { "\t" }, StringSplitOptions.RemoveEmptyEntries);
                var arr1 = new string[line1.Length];
                if (line1.Length != line.Length)
                {
                    MessageBox.Show("数据文件第" + count.ToString() + "行不符合要求，请检查！");
                    return;
                }
                else
                {
                    for (var O = 0; O < line1.Length; O++) arr1[O] = line1[O];
                    list.Add(arr1);
                }
            }

            var SJD = list.ToArray();

            M = new string[SJD.Length, line.Length];
            for (int i = 0; i < SJD.Length; i++)
            {
                for (int j = 0; j < line.Length; j++)
                { M[i, j] = SJD[i][j]; }
            }

            System.Data.DataTable dt = Convert(M);
            ExportExcel(dt, outPath);
        }

        public static void ExportExcel(System.Data.DataTable dtSource, string strFileName)
         {
              using (MemoryStream ms = Export(dtSource))
              {
                 using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                  {
                      byte[] data = ms.ToArray();
                      fs.Write(data, 0, data.Length);
                      fs.Flush();
                  }
              }
          }

        /// <summary>
        /// DataTable导出到Excel的MemoryStream
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        public static MemoryStream Export(DataTable dtSource)
        {
            HSSFWorkbook workbook = new NPOI.HSSF.UserModel.HSSFWorkbook();
            NPOI.SS.UserModel.ISheet sheet = workbook.CreateSheet();

            #region 右击文件 属性信息
            {
                DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
                dsi.Company = "NPOI";
                workbook.DocumentSummaryInformation = dsi;

                SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
                si.Author = "文件作者信息"; //填加xls文件作者信息
                si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
                si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
                si.Comments = "作者信息"; //填加xls文件作者信息
                si.Title = "标题信息"; //填加xls文件标题信息
                si.Subject = "主题信息";//填加文件主题信息
                si.CreateDateTime = DateTime.Now;
                workbook.SummaryInformation = si;
            }
            #endregion

            ICellStyle dateStyle = workbook.CreateCellStyle();
            IDataFormat format = workbook.CreateDataFormat();
            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

            //取得列宽
            int[] arrColWidth = new int[dtSource.Columns.Count];
            foreach (DataColumn item in dtSource.Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
            }
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;
            foreach (DataRow row in dtSource.Rows)
            { 

                #region 填充内容
                IRow dataRow = sheet.CreateRow(rowIndex);
                foreach (DataColumn column in dtSource.Columns)
                {
                    ICell newCell = dataRow.CreateCell(column.Ordinal);

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())
                    {
                        case "System.String"://字符串类型
                            newCell.SetCellValue(drValue);
                            break;
                        case "System.DateTime"://日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);
                            newCell.SetCellValue(dateV);

                            newCell.CellStyle = dateStyle;//格式化显示
                            break;
                        case "System.Boolean"://布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16"://整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal"://浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull"://空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }

                }
                #endregion

                rowIndex++;
            }
            using (MemoryStream ms = new MemoryStream())
            {
                workbook.Write(ms);
                ms.Flush();
                ms.Position = 0;

                return ms;
            }
        }
       
        /// <summary>  
        /// 反一个M行N列的二维数组转换为DataTable  
        /// </summary>  
        /// <param name="Arrays">M行N列的二维数组</param>  
        /// <returns>返回DataTable</returns>  
        public static System.Data.DataTable Convert(string[,] Arrays)
        {
            System.Data.DataTable dt = new System.Data.DataTable();

            int a = Arrays.GetLength(0);
            for (int i = 0; i < Arrays.GetLength(1); i++)
            {
                dt.Columns.Add(Arrays[0,i].ToString(), typeof(string));
            }

            for (int i1 = 0; i1 < Arrays.GetLength(0); i1++)
            {
                DataRow dr = dt.NewRow();
                for (int i = 0; i < Arrays.GetLength(1); i++)
                {
                    dr[i] = Arrays[i1, i].ToString();
                }
                dt.Rows.Add(dr);
            }

            return dt;

        }    


    }
}