I am trying to upload a file in to share point portal server with
the help of web services (Lists) using ASP.Net as UI.
I could able to create new List programatically but when i want to
attach a file in that created list with the help of AddAttachment
method...I am getting problem to identify 2nd argument of
Addattachment method(listItemId)..what would be the significant of
this ID....I have tried GUID in this place but failed to solve the
problem....

From Where i can get this listItemId or which services ....i have to
use web services only....

If u need more clearification to get this problem plase let me
know.....

Please help me to figure out this problem...