C# Excel导入Access

 /// <summary>
 /// 导入
 /// </summary>
 private void btn_In_Click(object sender, EventArgs e)
 {
     int i = DataTableToDB();
     MessageBox.Show("成功导入" + i + "条商品信息！");
 } /// <summary>
 /// 获取后缀名为*.xlsx的文件
 /// </summary>
 public void GetFile()
 {
      System.IO.DirectoryInfo dir = new DirectoryInfo(VPath);
      if (dir.Exists)//判读是否存在改文件
      {
          fiList = dir.GetFiles("*.xlsx"); //获取后缀名为*.xlsx的文件
      }
 } /// <summary>
 /// Excel数据转化为DataTable
 /// </summary>
 /// <param name="strSheetName"></param>
 /// <param name="strExcelFileName">文件路径</param>
 /// <returns>返回DataTable</returns>
 public DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)
 {
     string strConn = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 8.0;HDR=NO;IMEX=1;'", strExcelFileName);
     string strExcel = string.Format("select * from [{0}$]", strSheetName);
     DataSet ds = new DataSet();     using (OleDbConnection conn = new OleDbConnection(strConn))
     {
         conn.Open();
         OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
         adapter.Fill(ds, strSheetName);
         conn.Close();
     }     return ds.Tables[strSheetName];
 } public int DataTableToDB()
 {
     GetFile();
     int count = ;
     string _strExcelFileName = "";
     for (int i = ; i < fiList.Length; i++)
     {
         _strExcelFileName = dir + "\\" + fiList[i];         DataTable dtExcel = Global.g_objDb.ExcelToDataTable(_strExcelFileName, "Sheet1");
         for (int j = ; j < dtExcel.Rows.Count; j++)
         {
             if ((ReturnSqlResultCount("select * from A where a1='" + dtExcel.Rows[j][].ToString() + "'")) > )
             {
                 continue;
             }
             else
             {
                 Global.g_objDb.InsertDataToAccess(dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString(), dtExcel.Rows[j][].ToString());                 count++;
             }
         }
     }     return count;
 } String connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Access_DataBase.mdb;Jet OLEDB:Database Password=123456"";  OleDbConnection Connection = new OleDbConnection(connectionString);   /// <summary>
 /// 执行一查询语句语句，同时返回bool值
 /// </summary>
 public bool InsertDataToAccess(string col1, string col2, string col3, string col4, string col5, string col6, string col7, string col8)
 {
     bool resultState = false;     Connection.Open();
     string strSQL = "insert into spdm(a,b,c,d,e,f,g,h) values('" + col1 + "','" + col1 + "','" + col1 + "','" + col1 + "','" + col1 + "','" + col1 + "','" + col1 + "','" + col1 + "')";
     OleDbTransaction myTrans = Connection.BeginTransaction();
     OleDbCommand command = new OleDbCommand(strSQL, Connection, myTrans);     try
     {
         command.ExecuteNonQuery();
         myTrans.Commit();
         resultState = true;
     }
     catch
     {
         myTrans.Rollback();
         resultState = false;
     }
     finally
     {
         Connection.Close();
     }
     return resultState;
 } /// <summary>
 /// 执行一查询语句，同时返回查询结果数目
 /// </summary>
 /// <param name="strSQL"></param>
 /// <returns></returns>
 public int ReturnSqlResultCount(string strSQL)
 {
     int sqlResultCount = ;     try
     {
         Connection.Open();
         OleDbCommand command = new OleDbCommand(strSQL, Connection);
         OleDbDataReader dataReader = command.ExecuteReader();         while (dataReader.Read())
         {
             sqlResultCount++;
         }
         dataReader.Close();
     }
     catch
     {
         sqlResultCount = ;
     }
     finally
     {
         Connection.Close();
     }
     return sqlResultCount;
 }