Question

我已尝试使用以下编码在服务器端生成excel文件。

C＃CODING：

public void ReadandOpenExcel(DirectoryInfo outputDir)
    {

        //FileInfo newFile = new FileInfo(outputDir.FullName + @"\New Microsoft Excel Worksheet.xlsx");

        var ExistFile = Server.MapPath("~/excelsample.xlsx");

        var File = new FileInfo(ExistFile);


        using (ExcelPackage package = new ExcelPackage(File))
        {
            package.Load(new FileStream(ExistFile, FileMode.Open));

            ExcelWorksheet workSheet = package.Workbook.Worksheets["Sheet1"];

            workSheet.Cells["A8"].Value = "kevin";

            package.Save();


            Response.Clear();
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

            Response.AddHeader("Content-Disposition", "attachment; filename=ProposalRequest.xslx");
            **Response.BinaryWrite(package.GetAsByteArray());**
            // myMemoryStream.WriteTo(Response.OutputStream); //works too
            Response.Flush();
            Response.Close();
        }
    }

运行上面的代码时出现错误：＆＃34; 包对象已关闭并处置，因此无法对此对象或此包的某个部分上打开的任何流执行操作。＆＃34;

此行的错误：

Response.BinaryWrite（package.GetAsByteArray（））;

让这种编码继续前进。

提前致谢。

Answer 1

如果在执行Save之前获得字节，它是否有效？

Byte[] bin = package.GetAsByteArray();
package.Save();

然后在Binarywrite中使用该值;

Response.BinaryWrite(bin);

也许它会在.Save()来电时关闭？

在服务器端读取和保存excel文件时出错

1 个答案: