Question

当我在本地计算机上使用此类时，它会提示用户打开xlsx文件，但是当我发布到Azure时，它不再有效。我很确定我的问题是我在Azure上处理文件流时没有。希望有人可以帮助我。

我在本地发布时有效的代码 -

if (vm.ExportClicked != null && vm.ExportClicked.ToLower() == "true")
            {
                //doing this because I need the entire list not just a single page
                CustomerLastOrderListViewModel vm1 = new CustomerLastOrderListViewModel();
                var oPagedCustomerLists = oFilteredCustomerList.OrderByDescending(c => c.Id);

                //.ToList();
                List<CustomerLastOrderViewModel> customersLastOrders = CombineWithLastOrder(oPagedCustomerLists.ToList());
                vm1.CustomersLastOrder = customersLastOrders;
                DataTable dt = CreateCustomerEmailData(vm1, form);
                CreateExcelFile.CreateExcelDocument(dt, "CustomerEmailList.xlsx", HttpContext.ApplicationInstance.Response);

我正在使用此响应，因为我无法使用其他任何内容进行编译。 Excel类在文件流中返回信息，我想知道因为我在Azure上并且没有安装Excel，所以我必须做一些不同的事情。

这是CreateExcelDocument -

    public static bool CreateExcelDocument(DataTable dt, string filename, System.Web.HttpResponse Response)
    {
        try
        {
            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
            CreateExcelDocumentAsStream(ds, filename, Response);
            ds.Tables.Remove(dt);
            return true;
        }
        catch (Exception ex)
        {
            Trace.WriteLine("Failed, exception thrown: " + ex.Message);
            return false;
        }
    }

public static bool CreateExcelDocumentAsStream(DataSet ds, string filename, System.Web.HttpResponse Response)
{
    try
    {
        System.IO.MemoryStream stream = new System.IO.MemoryStream();
        using (SpreadsheetDocument document = SpreadsheetDocument.Create(stream, SpreadsheetDocumentType.Workbook, true))
        {
            WriteExcelFile(ds, document);
        }
        stream.Flush();
        stream.Position = 0;

        Response.ClearContent();
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "";

        //  NOTE: If you get an "HttpCacheability does not exist" error on the following line, make sure you have
        //  manually added System.Web to this project's References.

        Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
        Response.AddHeader("content-disposition", "attachment; filename=" + filename);
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        byte[] data1 = new byte[stream.Length];
        stream.Read(data1, 0, data1.Length);
        stream.Close();
        Response.BinaryWrite(data1);
        Response.Flush();
        Response.End();

        return true;
    }
    catch (Exception ex)
    {
        Trace.WriteLine("Failed, exception thrown: " + ex.Message);
        return false;
    }
}

Answer 1

在CreateExcelDocument尝试更改此内容;

CreateExcelDocumentAsStream(ds, filename, Response);

要;

CreateExcelDocumentAsStream(ds, filename, Response.OutputStream);

我很确定你在接受HttpResponse时传递Stream（或者至少我从方法名称推断它，我找不到任何文档，所以我假设它是专有的。）

C＃不确定如何处理System.Web.HttpResponse

1 个答案: