CODEWITHSUNDEEP
c#active-directory
Wheels496
Wheels496

Reputation: 93

C# active directory-what if a domain controller is down?

I have the following code, which retrieves all the active directory groups a specific user belongs to:-

string[] output = null;

using (var ctx = new PrincipalContext(ContextType.Domain, "???.???.uk"))
using (var user = UserPrincipal.FindByIdentity(ctx, username))
{
    if (user != null)
    {
        output = user.GetGroups() //this returns a collection of principal objects                 .Select(x => x.SamAccountName) // select the name.  you may change this to choose the display name or whatever you want
            .ToArray(); // convert to string array
    }
}

The only problem I have is when the domain controller is down. I thought the above code would simply look through other controllers until it found one that was up. How can I rewrite the above code, so that it doesn't fall over when a single domain controller is unavailable?

Thanks

Upvotes: 0

Views: 249

Answers (1)

Jawad
Jawad

Reputation: 11364

If you want to use any available domain controller, if there is one, you can use the name of the domain instead of defining the controller.

using (var ctx = new PrincipalContext(ContextType.Domain, "example.uk"))

Another thing you can do is get a list of all the domain controllers and filter them to get the first available controller

Domain domain = Domain.GetCurrentDomain();
var allControllers = domain.DomainControllers;

Once you find a working controller, you can use that to create your context

Upvotes: 1

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