读取excel文件，并且通过excel查询数据库，导出excel

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Oracle.ManagedDataAccess;
using Oracle.ManagedDataAccess.Client;
using System.IO;
using System.Data.OleDb;
//using Microsoft.Office.Interop.Excel;

namespace PrintPMS
{
    public partial class Print : Form
    {
        BarTender.Application btApp = new BarTender.Application（）;
        BarTender.Format btFormat;
        string str = ““;

        public Print（）
        {
            InitializeComponent（）;
        }

        public static string GetExcelFirstTableName（string connectstring）
        {
            using （OleDbConnection connection 

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2020-03-30 10:08  PrintPMS\
     目录           0  2020-03-30 09:36  PrintPMS\.vs\
     目录           0  2020-03-30 09:36  PrintPMS\.vs\PrintPMS\
     目录           0  2020-03-30 09:36  PrintPMS\.vs\PrintPMS\v15\
     文件       59392  2020-04-02 17:05  PrintPMS\.vs\PrintPMS\v15\.suo
     目录           0  2020-04-01 17:30  PrintPMS\PrintPMS\
     文件        1774  2020-04-01 09:31  PrintPMS\PrintPMS\App.config
     文件       41946  2020-04-01 09:51  PrintPMS\PrintPMS\Print.Designer.cs
     文件       42035  2020-04-01 10:01  PrintPMS\PrintPMS\Print.cs
     文件       17553  2020-04-01 09:51  PrintPMS\PrintPMS\Print.resx
     文件        9096  2020-04-02 08:20  PrintPMS\PrintPMS\PrintPMS.csproj
     文件         554  2020-04-01 20:01  PrintPMS\PrintPMS\PrintPMS.csproj.user
     文件        1660  2020-04-01 12:42  PrintPMS\PrintPMS\PrintPMS_TemporaryKey.pfx
     文件         520  2020-03-30 09:49  PrintPMS\PrintPMS\Program.cs
     目录           0  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\
     文件        1332  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\AssemblyInfo.cs
     文件        2829  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\Resources.Designer.cs
     文件        5612  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\Resources.resx
     文件        1095  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\Settings.Designer.cs
     文件         249  2020-03-30 09:36  PrintPMS\PrintPMS\Properties\Settings.settings
     目录           0  2020-03-30 09:49  PrintPMS\PrintPMS\bin\
     目录           0  2020-04-02 16:57  PrintPMS\PrintPMS\bin\Debug\
     文件      251110  2020-04-01 09:52  PrintPMS\PrintPMS\bin\Debug\20200401-095214
     文件      196096  2018-08-15 17:16  PrintPMS\PrintPMS\bin\Debug\ICSharpCode.SharpZipLib.dll
     文件      522397  2018-08-15 17:16  PrintPMS\PrintPMS\bin\Debug\ICSharpCode.SharpZipLib.xml
     文件      530432  2018-12-17 19:15  PrintPMS\PrintPMS\bin\Debug\NPOI.OOxml.dll
     文件       89088  2018-12-17 19:15  PrintPMS\PrintPMS\bin\Debug\NPOI.Openxml4Net.dll
     文件     2078720  2018-12-17 19:15  PrintPMS\PrintPMS\bin\Debug\NPOI.OpenxmlFormats.dll
     文件     1623552  2018-12-17 19:15  PrintPMS\PrintPMS\bin\Debug\NPOI.dll
     文件     5009408  2019-12-02 19:26  PrintPMS\PrintPMS\bin\Debug\Oracle.ManagedDataAccess.dll
     文件        1827  2020-04-02 16:57  PrintPMS\PrintPMS\bin\Debug\PrintPMS.application
............此处省略107个文件信息