[hueikar]

I am trying to develop a simulate de ecommerce win7 app since it is my school project..but i had no idea to do a login function on a mobile device..
Can someone teach me how to do it? My database is sql server and i am using window phone emulator 7.1.

[CommonBlob]

a tricky one that needs depth, but roughly you would have a user table with hashed passwords.
A wcf service to authenticate passing a password hash over SSL along with a username. Then return a true or FALSE and whatever other info you needed.

The hash is important if you want to be secure. Don't do MD5. I thing a SHA one would cover it and preferably with a salt too.

[milahenner]

Yes but you can download an already created login app from the website. just try to visit the microsoft website to get it download it just costs a few bugs

[dotnetnelson]

Remember to salt your passwords. Please. You can probably use AspNetWebApi which to me is a lot less annoying than a SOAP service.