I'm rusty on this so had to look it up (and I'm still not sure it's the best solution but):
You can use Membership.GetUser(Page.Identity.Name) to get the relevant MembershipUser and it's ProviderUserKey property will give you the Id. However I think this, in itself, will cause a hit on the DB so I guess you should do it on the initial authentication and store it as a session variable for future use ?
This also begs the question of what you want to do with it once it's stored ?
HTH,
Viv

>Sorry for about that. I am using the built in Membership controls. It works quite well except I need to get the user ID that is stored in the aspnet_Membership table. I found the user name in Page.User.Identity.Name. I really don't want to make another trip to the database just to get the userid.
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>>>Hi All
>>>
>>>I have my web site running and logging in. The login controls seems to be this big black box and I can't seem to find much documentation on how the work. I seems hard to find anything in the help. Now I need to know where to get the user id for each hit after the user logs in?
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>>You don't mention what authentication you are using and I'm not sure what you mean by the 'user id' but Page.User should provide an IPrincipal so maybe something like Page.User.Identity.Name........