前些日子做了一個(gè)簡(jiǎn)單的winform程序，需要導(dǎo)出的功能，剛開(kāi)始省事直接使用微軟的組件，但是導(dǎo)出之后發(fā)現(xiàn)效率極其低下，絕對(duì)像web那樣使用npoi組件，因此簡(jiǎn)單的進(jìn)行了整理，包括直接根據(jù)DataTable導(dǎo)出excel及DataGridview導(dǎo)出excel，版本是1.2.4，下面貼下主要代碼兩種方式，1、NPOI導(dǎo)出excel、 2、普通的導(dǎo)出excel

下面貼下主要代碼：NPOI導(dǎo)出

/// <summary>/// DataTable導(dǎo)出到Excel文件/// </summary>/// <param name="dtSource">源DataTable</param>/// <param name="strHeaderText">表頭文本</param>/// <param name="strFileName">保存位置</param>public static void DataTableToExcel(DataTable dtSource, string strHeaderText, string strFileName){using (MemoryStream ms = DataTableToExcel(dtSource, strHeaderText)){using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write)){byte[] data = ms.ToArray();fs.Write(data, 0, data.Length);fs.Flush();}}}/// <summary>/// DataTable導(dǎo)出到Excel的MemoryStream/// </summary>/// <param name="dtSource">源DataTable</param>/// <param name="strHeaderText">表頭文本</param>public static MemoryStream DataTableToExcel(DataTable dtSource, string strHeaderText){HSSFWorkbook workbook = new HSSFWorkbook();HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet();#region 右擊文件 屬性信息{DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();dsi.Company = "NPOI";workbook.DocumentSummaryInformation = dsi;SummaryInformation si = PropertySetFactory.CreateSummaryInformation();si.Author = "文件作者信息"; //填加xls文件作者信息si.ApplicationName = "創(chuàng)建程序信息"; //填加xls文件創(chuàng)建程序信息si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息si.Comments = "作者信息"; //填加xls文件作者信息si.Title = "標(biāo)題信息"; //填加xls文件標(biāo)題信息si.Subject = "主題信息";//填加文件主題信息si.CreateDateTime = System.DateTime.Now;workbook.SummaryInformation = si;}#endregionHSSFCellStyle dateStyle = (HSSFCellStyle)workbook.CreateCellStyle();HSSFDataFormat format = (HSSFDataFormat)workbook.CreateDataFormat();dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");//取得列寬int[] arrColWidth = new int[dtSource.Columns.Count];foreach (DataColumn item in dtSource.Columns){arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;}for (int i = 0; i < dtSource.Rows.Count; i++){for (int j = 0; j < dtSource.Columns.Count; j++){int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;if (intTemp > arrColWidth[j]){arrColWidth[j] = intTemp;}}} int rowIndex = 0; foreach (DataRow row in dtSource.Rows){#region 新建表，填充表頭，填充列頭，樣式if (rowIndex == 65535 || rowIndex == 0){if (rowIndex != 0){sheet = (HSSFSheet)workbook.CreateSheet();}#region 表頭及樣式{HSSFRow headerRow = (HSSFRow)sheet.CreateRow(0);headerRow.HeightInPoints = 25;headerRow.CreateCell(0).SetCellValue(strHeaderText);HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();// headStyle.Alignment = CellHorizontalAlignment.CENTER;HSSFFont font = (HSSFFont)workbook.CreateFont();font.FontHeightInPoints = 20;font.Boldweight = 700;headStyle.SetFont(font);headerRow.GetCell(0).CellStyle = headStyle;// sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));//headerRow.Dispose();}#endregion#region 列頭及樣式{HSSFRow headerRow = (HSSFRow)sheet.CreateRow(1); HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();//headStyle.Alignment = CellHorizontalAlignment.CENTER;HSSFFont font = (HSSFFont)workbook.CreateFont();font.FontHeightInPoints = 10;font.Boldweight = 700;headStyle.SetFont(font); foreach (DataColumn column in dtSource.Columns){headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);headerRow.GetCell(column.Ordinal).CellStyle = headStyle;//設(shè)置列寬sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256); }// headerRow.Dispose();}#endregionrowIndex = 2;}#endregion#region 填充內(nèi)容HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex);foreach (DataColumn column in dtSource.Columns){HSSFCell newCell =(HSSFCell) dataRow.CreateCell(column.Ordinal);string drValue = row[column].ToString();switch (column.DataType.ToString()){case "System.String"://字符串類(lèi)型newCell.SetCellValue(drValue);break;case "System.DateTime"://日期類(lèi)型System.DateTime dateV;System.DateTime.TryParse(drValue, out dateV);newCell.SetCellValue(dateV);newCell.CellStyle = dateStyle;//格式化顯示break;case "System.Boolean"://布爾型bool boolV = false;bool.TryParse(drValue, out boolV);newCell.SetCellValue(boolV);break;case "System.Int16"://整型case "System.Int32":case "System.Int64":case "System.Byte":int intV = 0;int.TryParse(drValue, out intV);newCell.SetCellValue(intV);break;case "System.Decimal"://浮點(diǎn)型case "System.Double":double doubV = 0;double.TryParse(drValue, out doubV);newCell.SetCellValue(doubV);break;case "System.DBNull"://空值處理newCell.SetCellValue("");break;default:newCell.SetCellValue("");break;}}#endregionrowIndex++;} using (MemoryStream ms = new MemoryStream()){workbook.Write(ms);ms.Flush();ms.Position = 0;sheet.Dispose();//workbook.Dispose();//一般只用寫(xiě)這一個(gè)就OK了，他會(huì)遍歷并釋放所有資源，但當(dāng)前版本有問(wèn)題所以只釋放sheetreturn ms;} }

普通excel導(dǎo)出

#region 導(dǎo)出excelpublic static void ExportExcel(string fileName, DataGridView myDGV,bool isShowDialog){string saveFileName = "";if (isShowDialog){//bool fileSaved = false;SaveFileDialog saveDialog = new SaveFileDialog();saveDialog.DefaultExt = "xls";saveDialog.Filter = "Excel文件|*.xls";saveDialog.FileName = fileName;saveDialog.ShowDialog();saveFileName = saveDialog.FileName;if (saveFileName.IndexOf(":") < 0) return; //被點(diǎn)了取消 }else{// saveFileName = Application.StartupPath + @"\導(dǎo)出記錄\" + fileName + ".xls";saveFileName = fileName;}Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();if (xlApp == null){MessageBox.Show("無(wú)法創(chuàng)建Excel對(duì)象，可能您的機(jī)子未安裝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 //寫(xiě)入標(biāo)題for (int i = 0; i < myDGV.ColumnCount; i++){worksheet.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;}//寫(xiě)入數(shù)值for (int r = 0; r < myDGV.Rows.Count; r++){for (int i = 0; i < myDGV.ColumnCount; i++){if (myDGV[i, r].ValueType == typeof(string)|| myDGV[i, r].ValueType == typeof(DateTime))//這里就是驗(yàn)證DataGridView單元格中的類(lèi)型,如果是string或是DataTime類(lèi)型,則在放入緩 存時(shí)在該內(nèi)容前加入" ";{worksheet.Cells[r + 2, i + 1] = "'" + myDGV.Rows[r].Cells[i].Value;}else{worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;}}System.Windows.Forms.Application.DoEvents();}worksheet.Columns.EntireColumn.AutoFit();//列寬自適應(yīng)//if (Microsoft.Office.Interop.cmbxType.Text != "Notification")//{// Excel.Range rg = worksheet.get_Range(worksheet.Cells[2, 2], worksheet.Cells[ds.Tables[0].Rows.Count + 1, 2]);// rg.NumberFormat = "00000000";//}if (saveFileName != ""){try{workbook.Saved = true;workbook.SaveCopyAs(saveFileName);//fileSaved = true;}catch (Exception ex){//fileSaved = false;MessageBox.Show("導(dǎo)出文件時(shí)出錯(cuò),文件可能正被打開(kāi)！\n" + ex.Message);}}//else//{// fileSaved = false;//}xlApp.Quit();GC.Collect();//強(qiáng)行銷(xiāo)毀 // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打開(kāi)EXCELMessageBox.Show(fileName + "保存成功", "提示", MessageBoxButtons.OK);}#endregion

5萬(wàn)條數(shù)據(jù)性能測(cè)試

下面附上源碼，里面有NPOI和普通導(dǎo)出excel的性能比較。

下載源碼?如果您覺(jué)的文章不錯(cuò)，請(qǐng)點(diǎn)擊推薦！

轉(zhuǎn)載于:https://www.cnblogs.com/amylis_chen/p/8462215.html

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