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我正在尝试制作一个 excel 文件，然后通过 FileStreamResult 将其发回。我正在使用 asp.net 核心

我开始使用 NIPO 示例

var newFile = @"newbook.core.xlsx";

            var fs = new MemoryStream();


                IWorkbook workbook = new XSSFWorkbook();

                ISheet sheet1 = workbook.CreateSheet("Sheet1");

                sheet1.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));
                var rowIndex = 0;
                IRow row = sheet1.CreateRow(rowIndex);
                row.Height = 30 * 80;
                row.CreateCell(0).SetCellValue("this is content");
                sheet1.AutoSizeColumn(0);
                rowIndex++;

                var sheet2 = workbook.CreateSheet("Sheet2");
                var style1 = workbook.CreateCellStyle();
                style1.FillForegroundColor = HSSFColor.Blue.Index2;
                style1.FillPattern = FillPattern.SolidForeground;

                var style2 = workbook.CreateCellStyle();
                style2.FillForegroundColor = HSSFColor.Yellow.Index2;
                style2.FillPattern = FillPattern.SolidForeground;

                var cell2 = sheet2.CreateRow(0).CreateCell(0);
                cell2.CellStyle = style1;
                cell2.SetCellValue(0);

                cell2 = sheet2.CreateRow(1).CreateCell(0);
                cell2.CellStyle = style2;
                cell2.SetCellValue(1);

                workbook.Write(fs);

但它似乎将它保存到我的项目解决方案中。

我也看到了这个错误

   <div class="titleerror">ObjectDisposedException: Cannot access a closed Stream.</div>
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1 回答 1

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根据您的代码，您可以返回File正确的内容类型：

var newFile = @"newbook.core.xlsx";

var fs = new MemoryStream();


IWorkbook workbook = new XSSFWorkbook();

ISheet sheet1 = workbook.CreateSheet("Sheet1");

sheet1.AddMergedRegion(new CellRangeAddress(0, 0, 0, 10));
var rowIndex = 0;
IRow row = sheet1.CreateRow(rowIndex);
row.Height = 30 * 80;
row.CreateCell(0).SetCellValue("this is content");
sheet1.AutoSizeColumn(0);
rowIndex++;

var sheet2 = workbook.CreateSheet("Sheet2");
var style1 = workbook.CreateCellStyle();
style1.FillForegroundColor = HSSFColor.Blue.Index2;
style1.FillPattern = FillPattern.SolidForeground;

var style2 = workbook.CreateCellStyle();
style2.FillForegroundColor = HSSFColor.Yellow.Index2;
style2.FillPattern = FillPattern.SolidForeground;

var cell2 = sheet2.CreateRow(0).CreateCell(0);
cell2.CellStyle = style1;
cell2.SetCellValue(0);

cell2 = sheet2.CreateRow(1).CreateCell(0);
cell2.CellStyle = style2;
cell2.SetCellValue(1);

workbook.Write(fs);
MemoryStream memoryStream = new MemoryStream(fs.ToArray());
memoryStream.Position = 0;


return File(memoryStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", newFile);
于 2019-12-10T03:19:58.963 回答