datagridview的部分列导出到excel,该怎么解决

datagridview的部分列导出到excel
有一个datagridview里面有12列，有几个列为隐藏列。
我要的是把datagridview里的部分列导出成excel。就是说有选择性的导出。
如果我直接用datagridview作为参数导出的话，我在选择了导出的字段后，
原来的datagridview里的字段也跟着改变，因为datagridview为引用类型。
这样就不是想要的效果了。
我希望选择的列后原来的datagridview的显示不变，有什么办法解决？
麻烦能者援手。谢谢！

------解决方案--------------------
有一个比较简单的做法，把要输出的按插入tab建的格式排好，然后通过剪贴板复制粘贴到excel，就会自动根据tab分割到3列n行

C# code

String TempFileName = Path.GetTempFileName();
                                    SW = new StreamWriter(TempFileName);
                                    foreach (DataGridViewRow DR in GvLog.Rows)
                                    {
                                        //  假设输出1，2，5 列
                                        SW.WriteLine(DR.Cells["第一列"].Value.ToString() + Convert.ToChar((int)Keys.Tab)
                                            + DR.Cells["第二列"].Value.ToString() + Convert.ToChar((int)Keys.Tab)
                                            + DR.Cells["第五列"].Value.ToString());                                        );
                                    }
                                    SW.Close();
                                    SW = null;
                                    StreamReader SR = new StreamReader(TempFileName);
                                    Clipboard.Clear();
                                    Clipboard.SetText(SR.ReadToEnd(), TextDataFormat.UnicodeText);
                                    Excel.Application ExcelApplication = new Excel.Application();
                                    Excel.Workbooks ExcelWorkbooks = ExcelApplication.Workbooks;
                                    Excel.Workbook ExcelWorkbook = ExcelWorkbooks.Add(Missing.Value);
                                    Excel.Worksheet ExcelWorksheet = (Excel.Worksheet)ExcelWorkbook.ActiveSheet;
                                    ExcelWorksheet.Paste(Missing.Value, Missing.Value);
                                    ExcelWorkbook.SaveAs(DlgSaveFile.FileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                                        Missing.Value, Excel.XlSaveAsAccessMode.xlShared, Missing.Value,
                                        Missing.Value, Missing.Value, Missing.Value, Missing.Value);
                                    FreeExcelObject(ExcelWorksheet);
                                    ExcelWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);
                                    FreeExcelObject(ExcelWorkbook);
                                    FreeExcelObject(ExcelWorkbooks);
                                    ExcelApplication.Quit();
                                    FreeExcelObject(ExcelApplication);

------解决方案--------------------

C# code

根据你要的列，for循环去写，参考
  Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
                if (xlApp == null)
                {
                    MessageBox.Show("无法创建Excel对象，可能您的机器未安装Excel");
                    return;
                }
                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 
                Microsoft.Office.Interop.Excel.Range range;
                xlApp.Visible = false;
                worksheet.Cells[1, 1] = "抽奖结果" + this.cmbCity.SelectedItem.ToString() + "(" + DateTime.Now.ToString("yyyy-MM-dd HH") + ")";

                worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 7]).MergeCells = true; //合并单元格
                worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 7]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;//居中对齐
                worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 2]).ColumnWidth = 10;     //列宽
                worksheet.get_Range(worksheet.Cells[1, 2], worksheet.Cells[1, 3]).ColumnWidth = 20;     //列宽
                worksheet.get_Range(worksheet.Cells[1, 3], worksheet.Cells[1, 4]).ColumnWidth = 20;     //列宽
                worksheet.get_Range(worksheet.Cells[1, 4], worksheet.Cells[1, 5]).ColumnWidth = 20;     //列宽
                worksheet.get_Range(worksheet.Cells[1, 5], worksheet.Cells[1, 6]).ColumnWidth = 20;     //列宽
                worksheet.get_Range(worksheet.Cells[1, 6], worksheet.Cells[1, 7]).ColumnWidth = 20;     //列宽

//这里指定表头列，
                for (int i = 0; i < dataResult.Columns.Count; i++)
                {
                    worksheet.Cells[2, i + 1] = dataResult.Columns[i].HeaderText;//dt.Columns[i].ColumnName; 字段名称
                    range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[2, i + 1];
                    range.Interior.ColorIndex = 15;
                    range.Font.Bold = true;
                }
                
//循环导出数据，这里可以指定列，
                for (int r = 0; r < dataResult.Rows.Count; r++)
                {
                    for (int i = 0; i < dataResult.Columns.Count; i++)
                    {
                        worksheet.Cells[r + 3, i + 1] = "  " + dataResult[i, r].Value.ToString() + "  ";
                    }
                    Application.DoEvents();

datagridview的部分列导出到excel,该怎么解决

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