Excell向数据库导入数据问题

        /// <summary>
        /// 导入Excle主控方法
        /// </summary>
        private void ImportMain()
        {
            try
            {
                OpenFileDialog openFileDialog = new OpenFileDialog();
                openFileDialog.CheckFileExists = true;
                openFileDialog.CheckPathExists = true;
                openFileDialog.Filter = "excel filer(*.xls)|*.xls";
                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    //路径名
                    string pathName = openFileDialog.FileName;

                    DataTable dtOr = dt_jdsy.Clone();
                    dt_jdsy = ExcelOperation.ImportExcelToDataTable(pathName);

                    dtOr.TableName = dt_jdsy.TableName;
                    DataSet dsOr = new DataSet();
                    dsOr.Tables.Add(dtOr);

                    DataSet ds = new DataSet();
                    ds.Tables.Add(dt_jdsy.Copy());
                    dt_jdsy = GetDataSet(ds.GetXml(), dsOr.GetXmlSchema()).Tables[0];
                    gridControl1.DataSource = dt_jdsy;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public static System.Data.DataTable ImportExcelToDataTable(string Path)
        {
            System.Data.DataTable dtSource = new System.Data.DataTable();
            try
            {
                string tableName = "";
                string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Path + ";" + "Extended Properties=Excel 8.0;";
                using (OleDbConnection conn = new OleDbConnection(strConn))
                {
                    Workbook workbook = GetExcelObj(Path);
                    Worksheet woorksheet = (Worksheet)workbook.ActiveSheet;
                    tableName = woorksheet.Name;
                    workbook.Close(false, null, false);
                    conn.Open();
                    string strExcel = "";
                    strExcel = "Select * from [" + tableName + "$]";

                    OleDbDataAdapter myCommand = new OleDbDataAdapter(strExcel, strConn);
                    DataSet ds = new DataSet();
                    myCommand.Fill(ds, tableName);
                    dtSource = ds.Tables[tableName];
                }
            }
            catch (OleDbException olex)
            {
                throw new Exception("该Excel文件正在使用中...未能覆盖,请先关闭目标文件,重新导入!");
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                GC.Collect();
                GC.WaitForPendingFinalizers();
            }
            return dtSource;
        }