DataGrid1 和 EXCEL2003 间的相互操作 (DataGrid1 中是什么就向EXCEL中导出什么,隐藏列的不导出)

 //导出到EXCEL
        public  bool toOutExcel(DataGridView dg, string fileName)
        {
            SaveFileDialog dlg = new SaveFileDialog();
            dlg.Filter = "Excel files (*.xls)|*.xls|All files (*.*)|*.*";
            dlg.FilterIndex = 1;
            dlg.DefaultExt = "xls";
            dlg.FileName = fileName + ".xls";
            if (dlg.ShowDialog() != DialogResult.OK) return false;
            try
            {
                Excel.Application m_objExcel = new Excel.Application();
                if (m_objExcel == null)
                {
                    MessageBox.Show("EXCEL无法启动！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return false;
                }
                m_objExcel.Visible = true;
                Excel.Workbooks m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks;
                Excel._Workbook m_objBook = (Excel._Workbook)(m_objBooks.Add(Type.Missing));
                Excel.Sheets m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
                Excel._Worksheet m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(1));

                //设置格式
                //自由列宽
                Excel.Range m_objRange = m_objSheet.get_Range("A1", Type.Missing);
                m_objRange = m_objRange.get_Resize(dg.RowCount + 1, dg.ColumnCount);
                m_objRange.HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;
                m_objRange.Font.Size = 10;
                m_objRange.NumberFormatLocal = "@";

                for (int icol = 0; icol < dg.ColumnCount; icol++)
                {
                    DataGridViewColumn dgc = dg.Columns[icol];
                    if (dgc.Visible == false)
                    {
                        dg.Columns.Remove(dgc);
                        icol--;
                    }
                }
                object[,] objData = new Object[dg.RowCount + 1, dg.ColumnCount];
                for (int r = 0; r < dg.RowCount + 1; r++)
                {
                    for (int j = 0; j < dg.ColumnCount; j++)
                    {
                        if (r == 0)//加标题
                        {
                            objData[r, j] = dg.Columns[j].HeaderText;
                        }
                        else
                        {
                            objData[r, j] = dg[j, r - 1].Value;
                        }
                    }
                }
                m_objRange.Value2 = objData;
                m_objRange.Columns.AutoFit();

                 object m_objOpt = System.Reflection.Missing.Value;
                if (System.IO.File.Exists(dlg.FileName))
                {
                    System.IO.File.Delete(dlg.FileName);
                }

                m_objBook.SaveAs(dlg.FileName, m_objOpt, m_objOpt,
                                 m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,
                                 m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);

                return true;
            }
            catch (Exception ex)
            {
                Utility.ShowErrorMessage(ex.Message);
                return false;
            }
        }

        //由 EXCEL 导入到DataGrid1 EXCEL2003
        public void toDgvFromExcel(DataGridView dg)
        {
            // 打开文件
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Filter = "Excel files (*.xls)|*.xls|All files (*.*)|*.*";
            dlg.FilterIndex = 1;
            dlg.DefaultExt = "xls";
            dlg.FileName = "端子排数据.xls";
            if (dlg.ShowDialog() != DialogResult.OK)
                return  ;

            System.Data.OleDb.OleDbConnection oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
            System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter();
            DataSet dataSet1 = new DataSet();
            string strConnection = "";
            strConnection = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                "Data Source=" + dlg.FileName + ";" +
                "Extended Properties=Excel 8.0;";
            oleDbConnection1.ConnectionString = strConnection;
            oleDbDataAdapter1.SelectCommand = new System.Data.OleDb.OleDbCommand();
            oleDbDataAdapter1.SelectCommand.CommandText = "SELECT * FROM [Sheet1$]";
            oleDbDataAdapter1.SelectCommand.Connection = oleDbConnection1;
            DataTable dt = new DataTable();
            oleDbDataAdapter1.Fill(dt);
            dg.DataSource = dt;
        }