Cannot specify which attributes to return when querying an LDAP store

I am using the DirectoryServices.Protocols.SearchRequest type to make a request against an OpenDS store to retriev开发者_StackOverflowe some entries. I want to be able to control which attributes are returned for the entries in the response and thought the "Attributes" property would do it. However that property does not have a setter so I cannot do something like this:-

SearchRequest searchRequest = new SearchRequest
                                            {
                                                DistinguishedName = hubTable,
                                                Filter = ldapFilter,
                                                Scope = SearchScope.Subtree,                                                
                                                Attributes = new StringCollection{"Id", "File"}
                                            };
            //run the query and get the results
            SearchResponse results = connection.SendRequest(searchRequest) as SearchResponse;

Can anyone direct me to what I should be doing to filter the request to only return entries with the specified attributes and not all of them.

Ironically this worked:-

SearchRequest searchRequest = new SearchRequest(hubTable, ldapFilter, SearchScope.Subtree, new[] { "AppId", "File" });

Is there a reason why you're using SearchResuest? In any case you can use the DirectorySearcher class http://msdn.microsoft.com/en-us/library/system.directoryservices.directorysearcher.aspx to lookup entries. Here is an example of looking up 1 result http://msdn.microsoft.com/en-us/library/system.directoryservices.searchresult.aspx. Use the FindAll method to get all the results.

I would suspect you would need a different filter.

I am sure your ldapfilter has some criteria. You would need to AND it (with &) to include (&(Id=*)(File=*)) in order to get the results you are looking for.