Hi Chris,
Sorry for delay in responding.
If your intention is to open the excel file in another window, please use 'PromptDialog' property of ExcelDownloadType enumeration.
The following code snippet illustrates this.
workbook.SaveAs("Sample1.xls",Response,ExcelDownloadType.PromptDialog);
Please find the modified sample in the following location.
http://websamples.syncfusion.com/samples/XlsIO.Web/6.1.0.34/66757_Updated/main.htmIf I have misunderstood your requirement, could you please explain me in detail, so that I can work in depth and try to send a better solution?
Regards,
Fathima