openXML spreadsheetdocument返回字节数组,用于MVC文件下载

Question

我正在尝试将openXML电子表格文档作为byte []返回,然后我可以使用它来允许我的MVC将该文件发送给用户.这是我的spreadsheetdocument方法返回字节数组

using (MemoryStream mem = new MemoryStream())
{
    SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.
        Create(mem, SpreadsheetDocumentType.Workbook);

    // Add a WorkbookPart to the document.
    WorkbookPart workbookpart = spreadsheetDocument.AddWorkbookPart();
    workbookpart.Workbook = new Workbook();

    // Add a WorksheetPart to the WorkbookPart.
    WorksheetPart worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
    worksheetPart.Worksheet = new Worksheet(new SheetData());

    // Add Sheets to the Workbook.
    Sheets sheets = spreadsheetDocument.WorkbookPart.Workbook.
        AppendChild<Sheets>(new Sheets());

    SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();

    //row start
    for (int id = 0; id <= reports.Count(); id++)
    {
        if (id == 0)
        {
            Row contentRow = CreateContentRow(reports.ElementAt(id), true, 2 + id);
            sheetData.AppendChild(contentRow);
        }
        else
        {
            Row contentRow = CreateContentRow(reports.ElementAt((id - 1)), false, 2 + id);
            sheetData.AppendChild(contentRow);
        }
    }

    // Append a new worksheet and associate it with the workbook.
    Sheet sheet = new Sheet()
    {
        Id = spreadsheetDocument.WorkbookPart.
            GetIdOfPart(worksheetPart),
        SheetId = 1,
        Name = "mySheet"
    };
    sheets.Append(sheet);
    workbookpart.Workbook.Save();
    return mem.ToArray();
}

然后在我的MVC控制器中,我这样称呼它

return File(crs.CreateReportSpreadSheet(reports),"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Reports.xlsx");

文件下载,但是当你打开它时会显示一条文件已损坏的错误消息.有没有其他方法可以让他们下载这个文件？

Answer 1

我知道这已经很晚了,但我相信这是因为你完成它之后就没有在你的电子表格文件上打电话了.确保在返回内存流之前关闭文档以提交文档使用的所有基础流.

// code omitted for clarity...
workbookpart.Workbook.Save();
spreadsheetDocument.Close();
return mem.ToArray()

http://msdn.microsoft.com/en-gb/library/documentformat.openxml.packaging.spreadsheetdocument(v=office.14).aspx