Excel 文件“打开” “另存为”对话框未在 asp.net 中显示

Question

我已经搜索了 S/O，但找不到可以帮助我解决问题的解决方案。我正在将数据从我的 asp.net 应用程序导出到 xls 文件。当用户单击“导出数据”按钮时，我需要显示“打开/另存为/取消”对话框。

我该如何做到这一点？

        oSheet = Nothing
        oRange = Nothing
        oWB.SaveAs(sFileName.ToString())
        oWB.Close()
        oWB = Nothing
        oXL.Quit()

Answer 1

尝试这个代码块。您可能需要对其进行微调。代码的 Response 块与对话框有关：

Private Sub GenerateXLSXFile(tbl As DataTable) 

    Dim excelPackage = New ExcelPackage 

    Dim excelWorksheet = excelPackage.Workbook.Worksheets.Add("DemoPage") 

    excelWorksheet.Cells("A1").LoadFromDataTable(tbl, True) 

    Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" 
    Response.AddHeader("content-disposition", "attachment;  filename=ExcelDemo.xlsx") 

    Dim stream As MemoryStream = New MemoryStream(excelPackage.GetAsByteArray()) 

    Response.OutputStream.Write(stream.ToArray(), 0, stream.ToArray().Length) 

    Response.Flush() 

    Response.Close() 

End Sub 

Answer 2

您可以通过多种方式做到这一点。您提供的代码示例与此无关，但显然您创建了文件并将其保存到磁盘。鉴于您有文件路径，您可以使用 Response.WriteFile。您需要添加内容处置以打开“另存为”对话框。

Response.AddHeader("Content-Disposition", "attachment; filename=EXCELFILE.xs")
Response.ContentType = "application/ms-excel" // not sure you need the contenttype, and it may be different
Response.WriteFile(FULLPATHTOFILE)

Answer 3

嗯。你没有。您的 Excel 对象正在 WEB 服务器上的 ASP.NET 进程中运行。无法使该对话框显示在客户端（浏览器）端。

Answer 4

public void export()
{
try
{
    if (Session["ExcelGrid"] != null)
    {
        DataSet DS = null;
        if (Session["ExcelGrid"] != null)
        {
            DS = (DataSet)Session["ExcelGrid"];
            if (DS.Tables[0].Rows.Count > 0)
            {
                int j = 0;
                int k = 0;
                string FileName = string.Concat(DateTime.Now.ToString(), "Order");
                DataTable dt = DS.Tables[0];

                dt.Columns.Remove("UserRole");
                dt.Columns.Remove("iControlDeviationID");
                dt.Columns.Remove("sErrorCode");
                dt.Columns.Remove("sItemCategory");
                dt.Columns.Remove("sItemSubCategory");
                dt.Columns.Remove("iDeviationID");
                dt.Columns.Remove("iControlPointID");
                dt.Columns.Remove("sFacility");
                dt.Columns.Remove("sItemCategory1");
                dt.Columns.Remove("sItemSubCategory1");
                dt.Columns.Remove("sRegion");
                dt.Columns.Remove("sCountry");
                dt.Columns.Remove("sItem");
                dt.Columns["dRegisterDate"].SetOrdinal(5);


                Context.Response.AddHeader("Content-Disposition", "attachment;filename=" + FileName + ".xls");
                Context.Response.ContentType = "application/vnd.ms-excel";
                Context.Response.Charset = "";
                Context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("ISO-8859-1");
                Context.Response.Write("<table border=0 width='100%'><tr align = 'center'>");
                for (j = 0; j < 30; j++)
                {
                    if (j < 1)
                    {
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            if (dt.Columns[i].Caption.ToString() == "sDeviation")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.DeviationTypes.ToString().ToUpper() + "</b></td>");
                            if (dt.Columns[i].Caption.ToString() == "sDeviationCriticalLevel")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.DeviationCriticalLevel.ToString().ToUpper() + "</b></td>");
                            if (dt.Columns[i].Caption.ToString() == "sObject")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.Object.ToString().ToUpper() + "</b></td>");
                            if (dt.Columns[i].Caption.ToString() == "sControlArea")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.ControlArea.ToString().ToUpper() + "</b></td>");
                            if (dt.Columns[i].Caption.ToString() == "sControlPoint")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.ControlPoint.ToString().ToUpper() + "</b></td>");
                            if (dt.Columns[i].Caption.ToString() == "dRegisterDate")
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'><b>" + Resources.Resource.RegisteredDate.ToString().ToUpper() + "</b></td>");
                        }
                    }
                    else
                    {
                        Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'>" + " " + "</td>");
                    }
                }
                Context.Response.Write(" ");
                Context.Response.Write("</tr>");
                for (int l = 0; l < 100; l++)
                {

                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        DataRow dr = dt.Rows[i];
                        Context.Response.Write("<tr align = 'Left'>");
                        for (k = 0; k < j; k++)
                        {
                            if (k < 1)
                            {
                                for (int iCol = 0; iCol < dt.Columns.Count; iCol++)
                                {
                                    if (l < 1)
                                    {
                                        Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'>" + dr[iCol].ToString() + "</td>");
                                    }
                                    else
                                    {
                                        Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'>" + " " + "</td>");
                                    }
                                }
                            }
                            else
                            {
                                Context.Response.Write("<td style='border:#D0D7E5 1px solid; border-left:none;border-bottom:none'>" + " " + "</td>");
                            }
                        }
                    }
                }
                Context.Response.Write(" ");
                Context.Response.Write("</tr>");
                Context.Response.Write(" ");
                Context.Response.Write("</table>");

                Response.Buffer = true;
                Context.Response.Flush();                       
                Context.Response.Close();
                Context.Response.End();
                //ScriptManager.RegisterStartupScript(this, GetType(), "refresh", "window.setTimeout('window.location.reload(true);',5000);", true);
            }
        }
    }
}
catch (Exception ex)
{
    Response.Write(ex.Message.ToString());
}
finally
{
    ScriptManager.RegisterStartupScript(this, GetType(), "refresh", "a.aspx;", true);
}
}