I'm using Aspose.Cell in an ASP.NET website to create workbooks and open them in IE.
I'm using a handler called Export.ashx and open the workbook with the following code:
workbook.Save("Export.xls", FileFormatType.Excel2000, SaveType.OpenInBrowser, context.Response);
It works well with Excel 2000 and 2003 but with Excel 2007 I've got a message saying that the format of the file I'm trying to open ,"Export.ashx", is different than the one specified by the file's extension and ask for confirmation (sorry my version is in french and I don't have the message in english...). How not to have this warning?