C# NPOI匯出Excel 表格寬度自適應,支援中文
阿新 • • 發佈:2020-09-10
/// <summary> /// 轉換記憶體表為Office2007版本以上的EXCEL檔案流 /// </summary> /// <param name="sourceTable"></param> /// <param name="sheetName"></param> /// <param name="dateTimeFormat"></param> /// <returns></returns> publicView Codestatic MemoryStream DataTableToXLSXStream(DataTable sourceTable, string sheetName = "Sheet1", string dateTimeFormat = "yyyy-MM-dd HH:mm:ss") { XSSFWorkbook workbook = new XSSFWorkbook(); WriteReportToXLSXSheet(workbook, sourceTable, sheetName, dateTimeFormat); ISheet sheet= workbook.GetSheetAt(0); //設定自適應寬度,9為Excel列數,根據需要自已修改 for (int columnNum = 0; columnNum <= 9; columnNum++) { int columnWidth = sheet.GetColumnWidth(columnNum) / 256; //5為開始修改的行數,預設為0行開始 for (int rowNum = 5; rowNum <= sheet.LastRowNum; rowNum++) { IRow currentRow= sheet.GetRow(rowNum); if (currentRow.GetCell(columnNum) != null) { ICell currentCell = currentRow.GetCell(columnNum); int length = Encoding.Default.GetBytes(currentCell.ToString()).Length+1; if (columnWidth < length) { columnWidth = length; } } } sheet.SetColumnWidth(columnNum, columnWidth * 256); } MemoryStream ms = new MemoryStream(); workbook.Write(ms, true); ms.Seek(0, SeekOrigin.Begin); return ms; }