Get Username from Active directory for Employee id

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C#

C#4.0

Dear All,

I have a application where I'm using user login id, password and domain name to validate from Active directory. ( e.g bob.mathew, mypassword, mycomp.net).

But i want to validate the user on basis of his employee id and password. Is it possible to do?
I did not find any suitable option to do so.


Please help me.


Regards,
Vidi


N.B : I have only 3 input Employee id, password and domain name (e.g. 3344, mypassword, mycomp.net)