每天定时读取Excel文件给指定数据库

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Runtime.InteropServices;

namespace TimeExcelToDatabase
{
    public partial class Frm_Main : Form
    {
        public Frm_Main（）
        {
            InitializeComponent（）;
        }

        #region 为INI文件中指定的节点取得字符串
        /// 

        /// 为INI文件中指定的节点取得字符串
        /// 

        /// 欲在其中查找关键字的节点名称
        /// 欲获取的项名
        /// 指定的项没有找到时返回的默认值
        /// 指定一个字串缓冲区，长度至少为nSize
        /// 指定装载到lpReturnedString缓冲区的最大字符数量
        /// INI文件名
        /// 复制到lpReturnedString缓冲区的字节数量，其中不包括那些

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         947  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase.sln
     文件       21504  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase.suo
     文件       22002  2010-06-25 20:35  TimeExcelToDatabase\TimeExcelToDatabase\Frm_Main.cs
     文件       20726  2010-06-13 10:59  TimeExcelToDatabase\TimeExcelToDatabase\Frm_Main.designer.cs
     文件        6212  2010-06-13 10:59  TimeExcelToDatabase\TimeExcelToDatabase\Frm_Main.resx
     文件         503  2010-06-13 09:34  TimeExcelToDatabase\TimeExcelToDatabase\Program.cs
     文件        4110  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\TimeExcelToDatabase.csproj
     文件       65536  2007-10-10 09:48  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\dao.dll
     文件      997992  2007-10-10 09:48  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\Microsoft.Office.Interop.Access.dll
     文件     1100392  2007-10-10 09:48  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\Microsoft.Office.Interop.Excel.dll
     文件         202  2010-07-29 09:40  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\Set.ini
     文件       24064  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\TimeExcelToDatabase.exe
     文件       42496  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\TimeExcelToDatabase.pdb
     文件       14328  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\TimeExcelToDatabase.vshost.exe
     文件         490  2009-06-11 05:14  TimeExcelToDatabase\TimeExcelToDatabase\bin\Debug\TimeExcelToDatabase.vshost.exe.manifest
     文件       14708  2010-06-13 10:36  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\ResolveAssemblyReference.cache
     文件        3147  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.csproj.FileListAbsolute.txt
     文件         850  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.csproj.GenerateResource.Cache
     文件       24064  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.exe
     文件         180  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.Frm_Main.resources
     文件       42496  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.pdb
     文件         180  2010-11-03 16:52  TimeExcelToDatabase\TimeExcelToDatabase\obj\Debug\TimeExcelToDatabase.Properties.Resources.resources
     文件        1370  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\Properties\AssemblyInfo.cs
     文件        2888  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\Properties\Resources.Designer.cs
     文件        5612  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\Properties\Resources.resx
     文件        1104  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\Properties\Settings.Designer.cs
     文件         249  2010-06-13 09:33  TimeExcelToDatabase\TimeExcelToDatabase\Properties\Settings.settings