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c# - search by samaccountname with wildcards

I have this code:

 public static DataTable ExecutesAMAccountNameQuery(string sAMAccountName)
        {
            string filter = "(&(objectCategory=person)(objectClass=user)(sAMAccountName=" + sAMAccountName + "))";
            return ExecuteADQuery("GC:", filter);
        }

It only works with the full username, I dont know the syntax to make it work with wildcards, like a LIKE in sql?

Thanks

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If you're using .NET 3.5 or newer, you can use a PrincipalSearcher and a "query-by-example" principal to do your searching:

// create your domain context
PrincipalContext ctx = new PrincipalContext(ContextType.Domain);

// define a "query-by-example" principal - here, we search for a UserPrincipal 
UserPrincipal qbeUser = new UserPrincipal(ctx);
qbeUser.SamAccountName = "Esteban*";

// create your principal searcher passing in the QBE principal    
PrincipalSearcher srch = new PrincipalSearcher(qbeUser);

// find all matches
foreach(var found in srch.FindAll())
{
    // do whatever here - "found" is of type "Principal" - it could be user, group, computer.....          
}

If you haven't already - absolutely read the MSDN article Managing Directory Security Principals in the .NET Framework 3.5 which shows nicely how to make the best use of the new features in System.DirectoryServices.AccountManagement. Or see the MSDN documentation on the System.DirectoryServices.AccountManagement namespace.

Of course, depending on your need, you might want to specify other properties on that "query-by-example" user principal you create:

  • DisplayName (typically: first name + space + last name)
  • SAM Account Name - your Windows/AD account name
  • User Principal Name - your "[email protected]" style name

You can specify any of the properties on the UserPrincipal and use those as "query-by-example" for your PrincipalSearcher.


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