Well, I am not clear about your query. Do you need the generated file (by Aspose.Cells for .NET) to open into MS Excel / client browser or saving the generated file prompting the user on his end. I think you can do as follows:
1). In .NET (C#/VB), you can use Workbook.Save() method.
[C#] workbook.Save("Book1.xls", FileFormatType.Default, SaveType.OpenInExcel, Response);
[VB] workbook.Save("Book1.xls", FileFormatType.Default, SaveType.OpenInExcel, Response)
'Save the document to the stream
set stream = xls.SaveToStream()
'Specify the document type
Response.ContentType = "application/vnd.ms-excel"
'Response.ContentType = "text/plain"
'Response.ContentType = "text/html"
'Specify how the document is sent to the browser.
Response.AddHeader "content-disposition","attachment; filename=MyBook.xls"
'Another option could be:
'Response.AddHeader "content-disposition","inline; filename=MyBook.xls";
'Get data bytes from the stream and send it to the response.
bytes = stream.ToArray()
Also I would like to know whether the properties and methods for a particular class are same in all languages or not?
And, please check the doc topic if it provides some references: