How to convert excel and csv file into xml in asp.net....

Hi,
To convert excel to XML see:
http://www.codeproject.com/office/excel2xml.asp
To convert CSV to XML see:
http://blogs.msdn.com/kaevans/archive/2003/04/17/5780.aspx
(It is not writed via ASP.NET, but you can refer it.)
To convert excel to csv see:
http://www.devasp.net/net/articles/display/141.html