If you are using a DataGrid on your form then check this:

http://www.codeproject.com/aspnet/DAtaGridExportToExcel.asp



>I have heard talk of a new method to create excel output in 2.0.
>However, the exact way to do it is elusive.
>Those who I hear discussing this are vauge and I am simply not sure if this even exists.
>
>I do need to output excel file from a ASP.NET/C#.NET 2.0 app. I would prefer a direct way to do this in 2.0 rather than hand roll the file.
>
>Any Help would be most appreciated,