public void chuchushuju() { try { string path = PathHelper.dataPath + @"\Measure\" + tjcjg.Year.ToString() + tjcjg.Month.ToString() + tjcjg.Day.ToString() + tjcjg.Hour.ToString() + tjcjg.Minute.ToString() + tjcjg.Second.ToString() + ".xls"; using (FileStream fs = File.OpenWrite(path)) { sheetc = 0; sheetrr = sheet.CreateRow(0); sheetcc = sheetrr.CreateCell(sheetc); sheetcc.SetCellValue("序号(NUMBER)"); sheetc += 1; sheetcc = sheetrr.CreateCell(sheetc); sheetcc.SetCellValue("测量时间(MESURE TIME)"); foreach (jiancejieguo jcjg3 in jcjg2) { sheetc += 1; sheetcc = sheetrr.CreateCell(sheetc); sheetcc.SetCellValue(jcjg3.jiancexiangmu); } wkb.Write(fs);//向打开的这个xls文件中写入并保存。 wkb.Clear(); sheetr = 0; sheetc = 0; sheet = wkb.CreateSheet("检测结果(Measure Data)"); tjcjg = DateTime.Now; sheetrr = sheet.CreateRow(sheetr); sheetcc = sheetrr.CreateCell(sheetc); } } catch { } finally { } }
public static void Free() //释放资源 { if (workbook != null) { workbook.Clear(); workbook.Close(); workbook = null; } }
private void WriteToFile() { string year = DateTime.Now.Year.ToString(); //string path = HttpContext.Current.Server.MapPath(DateTime.Now.ToString("yyyyMMddmmss") + ".xls"); string path = "d:\\a.xls"; FileStream file = new FileStream(path, FileMode.Create); _hssfworkbook.Write(file); file.Close(); _hssfworkbook.Clear(); }
protected override void Dispose(bool Disposing) { hssfworkbook.Clear(); }
private void ListWriteExcelFile(int allRows, int sheetCount, ExportFileInfo exportFileInfo, string filePath, List <T> list, CancellationToken token, ref int currectListOccupancyRows, ref int dispId, Action <int> exportProgressAction) { int currectSheetOccupancyRows = Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT; int sheetIdx = 1; int currectExcelIdx = 0; //当前excel操作行下标 int currectExcelCount = 0; var workbook = new HSSFWorkbook(); try { var sheet = CreateSheet(workbook, sheetCount, sheetIdx, exportFileInfo.ExcelTitle, out currectExcelIdx); int singleExcelMaxCount = Math.Min(Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO, allRows); while (currectExcelCount < singleExcelMaxCount) { token.ThrowIfCancellationRequested(); int readerCount = Math.Min(Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT, currectListOccupancyRows); readerCount = Math.Min(readerCount, currectSheetOccupancyRows); if (readerCount > 0) { var readList = list.GetRange(0, readerCount); int writeCount = 0; sheet = ListToSheet(workbook, sheet, readList, ref dispId, ref currectExcelIdx, exportProgressAction, token, out writeCount); list.RemoveRange(0, readerCount); singleExcelMaxCount -= readerCount; currectListOccupancyRows -= readerCount; currectExcelCount += writeCount; } #region state update if (currectListOccupancyRows <= 0 || readerCount == 0) { break; } if (singleExcelMaxCount >= Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO) { //Excel满了,退出当前Excel文件 break; } //切换Sheet if ((singleExcelMaxCount > 0 && singleExcelMaxCount % Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT == 0) || (currectSheetOccupancyRows == 0)) { if (sheetIdx == sheetCount) { break; } sheet.ForceFormulaRecalculation = true; sheetIdx++; sheet = CreateSheet(workbook, sheetCount, sheetIdx, exportFileInfo.ExcelTitle, out currectExcelIdx); currectSheetOccupancyRows = Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO - singleExcelMaxCount; } #endregion } WriteWorkbookToFile(workbook, filePath); } finally { workbook.Clear(); workbook = null; GC.Collect(); } }
private void QueryDataReaderWriteExcel(MySqlConnection conn, int allRows, int sheetCount, ExportFileInfo exportFileInfo, string filePath, CancellationToken token, string querySqlPart, List <string> tableNameList, List <int> tableCountList, string whereSqlPart, ref int tableIndex, ref int currectTableOccupancyRows, ref int currectTableStartRowIdx, ref int dispId, Action <int> exportProgressAction) { int currectSheetOccupancyRows = Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT; int sheetIdx = 1; //sheet下标 int currectExcelIdx = 0; //操作的excel操作行下标 int currectExcelCount = 0; var workbook = new HSSFWorkbook(); try { var sheet = CreateSheet(workbook, sheetCount, sheetIdx, exportFileInfo.ExcelTitle, out currectExcelIdx); int singleExcelMaxCount = Math.Min(Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO, allRows); while (currectExcelCount < singleExcelMaxCount) { token.ThrowIfCancellationRequested(); int readerCount = Math.Min(Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT, currectSheetOccupancyRows); readerCount = Math.Min(readerCount, currectTableOccupancyRows); if (readerCount > 0) { string commandText = CreateQuerySqlStrAction(querySqlPart, tableNameList[tableIndex], whereSqlPart, currectTableStartRowIdx, readerCount); int writeCount; sheet = DataReaderToSheet(workbook, sheet, conn, commandText, ref dispId, ref currectExcelIdx, exportProgressAction, token, out writeCount); singleExcelMaxCount -= readerCount; currectTableOccupancyRows -= readerCount; currectTableStartRowIdx += writeCount; currectExcelCount += writeCount; } #region state update if (currectTableOccupancyRows <= 0 || readerCount == 0) { //切换table currectTableStartRowIdx = 0; if (tableIndex == tableCountList.Count - 1) { break; } currectTableOccupancyRows = tableCountList[++tableIndex]; } if (singleExcelMaxCount >= Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO) { //Excel满了,退出当前Excel文件 break; } //切换Sheet if ((singleExcelMaxCount > 0 && singleExcelMaxCount % Pub.DEFAULT_EXCELEXPORT_SHEET_MAXCOUNT == 0) || (currectSheetOccupancyRows == 0)) { if (sheetIdx == sheetCount) { break; } sheet.ForceFormulaRecalculation = true; sheetIdx++; sheet = CreateSheet(workbook, sheetCount, sheetIdx, exportFileInfo.ExcelTitle, out currectExcelIdx); currectSheetOccupancyRows = Pub.DEFAULT_EXCEL_MAXCOUNT_FORINFO - singleExcelMaxCount; } #endregion } WriteWorkbookToFile(workbook, filePath); } finally { workbook.Clear(); workbook = null; GC.Collect(); } }
/// <summary> /// DataTable导出到Excel的MemoryStream /// </summary> /// <param name="dtSource">源DataTable</param> /// <param name="strHeaderText">表头文本</param> public static MemoryStream Export(DataTable dtSource, string strHeaderText) { HSSFWorkbook workbook = new HSSFWorkbook(); HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet(); #region 右击文件 属性信息 { 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 = "创建程序信息"; //填加xls文件创建程序信息 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 = "标题信息"; //填加xls文件标题信息 si.Subject = "主题信息"; //填加文件主题信息 si.CreateDateTime = DateTime.Now; workbook.SummaryInformation = si; } #endregion HSSFCellStyle dateStyle = (HSSFCellStyle)workbook.CreateCellStyle(); HSSFDataFormat format = (HSSFDataFormat)workbook.CreateDataFormat(); dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd"); //取得列宽 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,填充表头,填充列头,样式 if (rowIndex == 65535 || rowIndex == 0) { if (rowIndex != 0) { sheet = (HSSFSheet)workbook.CreateSheet(); } #region 表头及样式 { 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.Dis(); } #endregion #region 列头及样式 { 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; //设置列宽 sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256); } // headerRow.Dispose(); } #endregion rowIndex = 2; } #endregion #region 填充内容 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": //字符串类型 newCell.SetCellValue(drValue); break; case "System.DateTime": //日期类型 DateTime dateV; DateTime.TryParse(drValue, out dateV); newCell.SetCellValue(dateV); newCell.CellStyle = dateStyle; //格式化显示 break; case "System.Boolean": //布尔型 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": //浮点型 case "System.Double": double doubV = 0; double.TryParse(drValue, out doubV); newCell.SetCellValue(doubV); break; case "System.DBNull": //空值处理 newCell.SetCellValue(""); break; default: newCell.SetCellValue(""); break; } } #endregion rowIndex++; } using (MemoryStream ms = new MemoryStream()) { workbook.Write(ms); ms.Flush(); ms.Position = 0; // sheet.Dispose(); workbook.Clear();//一般只用写这一个就OK了,他会遍历并释放所有资源,但当前版本有问题所以只释放sheet return(ms); } }