c# 4.0 - how to enable registrations after admin approval in asp.net C#? -

i have 3 types of registrations

1.doctor registration 2.patient registration 3.agent registration

now admin has approve & enable doctor & agent registrations...

after approval of admin the user can login profiles

i assuming have created user table having login details of doctor , agent users. in same table have column of type bit field , name can isapproved.

in admin section provide form admin can see details , change status of isapproved.

in login form check whether username , password matching record , if yes isapproved columns's value shouold true.if not show appropriate message.