When i try to fill an excel template and push it to the browser with an open (in excel) / save dialog and choose open , excel tells me that it cannot find (no more?) the excel file and thus cannot open it.
saving is not any problem.
I use the following line of code and do not wish to save anything to disk before presenting it to the client (if possible).
designer.Save("test.xls", SaveType.OpenInExcel, FileFormatType.Default, this.Response);
Thanx a lot.