C#將DataTable海量數據導出到Excel

將DataTable中的大量數據導出到Excel表格中。

但每張Excel表單只能有65536行，所以當DataTable數據多於65536行時，Excel要考慮分頁功能。

 

通過查閱相關資料，得到導出方法。

代碼在Office 2003 環境下通過。末驗證其它Office版本。

using Excel = Microsoft.Office.Interop.Excel; public Excel.Application m_xlApp = null; /// <summary> /// 將DataTable數據導出到Excel表 /// </summary> /// <param name="tmpDataTable">要導出的DataTable</param> /// <param name="strFileName">Excel的保存路徑及名稱</param> public void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName) { if (tmpDataTable == null) { return; } long rowNum = tmpDataTable.Rows.Count;//行數 int columnNum = tmpDataTable.Columns.Count;//列數 Excel.Application m_xlApp = new Excel.Application(); m_xlApp.DisplayAlerts = false;//不顯示更改提示 m_xlApp.Visible = false; Excel.Workbooks workbooks = m_xlApp.Workbooks; Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet); Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 try { if (rowNum > 65536)//單張Excel表格最大行數 { long pageRows = 65535;//定義每頁顯示的行數,行數必須小於65536 int scount = (int)(rowNum / pageRows);//導出數據生成的表單數 if (scount * pageRows < rowNum)//當總行數不被pageRows整除時，經過四捨五入可能頁數不準 { scount = scount + 1; } for (int sc = 1; sc <= scount; sc++) { if (sc > 1) { object missing = System.Reflection.Missing.Value; worksheet = (Excel.Worksheet)workbook.Worksheets.Add( missing, missing, missing, missing);//添加一個sheet } else { worksheet = (Excel.Worksheet)workbook.Worksheets[sc];//取得sheet1 } string[,] datas = new string[pageRows + 1, columnNum]; for (int i = 0; i < columnNum; i++) //寫入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption;//表頭信息 } Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int init = int.Parse(((sc - 1) * pageRows).ToString()); int r = 0; int index = 0; int result; if (pageRows * sc >= rowNum) { result = (int)rowNum; } else { result = int.Parse((pageRows * sc).ToString()); } for (r = init; r < result; r++) { index = index + 1; for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加單引號是爲了防止自動轉化格式 } System.Windows.Forms.Application.DoEvents(); //添加進度條 } Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列寬自適應。 m_xlApp.WindowState = Excel.XlWindowState.xlMaximized;//Sheet表最大化 range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } } else { string[,] datas = new string[rowNum + 1, columnNum]; for (int i = 0; i < columnNum; i++) //寫入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption; } Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int r = 0; for (r = 0; r < rowNum; r++) { for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加單引號是爲了防止自動轉化格式 } System.Windows.Forms.Application.DoEvents(); //添加進度條 } Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列寬自適應。 m_xlApp.WindowState = Excel.XlWindowState.xlMaximized; range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } workbook.Saved = true; workbook.SaveCopyAs(strFileName); } catch (Exception ex) { MessageBox.Show("導出異常：" + ex.Message, "導出異常", MessageBoxButtons.OK, MessageBoxIcon.Warning); } finally { EndReport(); } } /// <summary> /// 退出報表時關閉Excel和清理垃圾Excel進程 /// </summary> private void EndReport() { object missing = System.Reflection.Missing.Value; try { m_xlApp.Workbooks.Close(); m_xlApp.Workbooks.Application.Quit(); m_xlApp.Application.Quit(); m_xlApp.Quit(); } catch { } finally { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Workbooks); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Application); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp); m_xlApp = null; } catch { } try { //清理垃圾進程 this.killProcessThread(); } catch { } GC.Collect(); } } /// <summary> /// 殺掉不死進程 /// </summary> private void killProcessThread() { ArrayList myProcess = new ArrayList(); for (int i = 0; i < myProcess.Count; i++) { try { System.Diagnostics.Process.GetProcessById(int.Parse((string)myProcess[i])).Kill(); } catch { } } }

 

 

 

 

相關資料：

1. http://www.cnblogs.com/Ihaveadream/archive/2009/01/04/1368525.html

2. http://msdn.microsoft.com/zh-cn/library/aa168292(office.11).aspx

3. http://msdn.microsoft.com/zh-cn/library/microsoft.office.tools.excel(VS.80).aspx