Question

I have a problem connecting to my ldap. It keeps giving me a COMExceptionError (The parameter is incorrect)

Here is the code i have so far:

static void Main(string[] args)
    {

        DirectoryEntry ldapConnection = new DirectoryEntry("10.9.130.113:667");
        ldapConnection.Path = "LDAP://ou=Users,ou=CorporateStore,ou=Absa,c=za";
        ldapConnection.AuthenticationType = AuthenticationTypes.Anonymous;

        DirectorySearcher ds = new DirectorySearcher(ldapConnection);
        SearchResult result = ds.FindOne();
        Console.ReadLine();
        if (result != null)
        {


            ResultPropertyCollection fields = result.Properties;

            foreach (String ldapField in fields.PropertyNames)
            {


                foreach (Object myCollection in fields[ldapField])
                    Console.WriteLine(String.Format("{0,-20} : {1}",
                                  ldapField, myCollection.ToString()));
                Console.ReadLine();
            }

This is the line the error occurs at:

SearchResult result = ds.findOne();

Heres the exception Error and stack trace:

System.Runtime.InteropServices.COMException was unhandled
  Message=The parameter is incorrect.

  Source=System.DirectoryServices
  ErrorCode=-2147024809
  StackTrace:
       at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
       at System.DirectoryServices.DirectoryEntry.Bind()
       at System.DirectoryServices.DirectoryEntry.get_AdsObject()
       at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne)
       at System.DirectoryServices.DirectorySearcher.FindOne()
       at LDAPConnector.Program.Main(String[] args) in c:\documents and settings\expn261\my documents\visual studio 2010\Projects\LDAPConnector\LDAPConnector\Program.cs:line 23
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

Any ideas?

Answer 1

It seems like you define different paths in the constructor to the DirectoryEntry and then override it by setting the Path property. If your server differ from the domain in the RDN you shall define it in the path. Can you try to do it in this way and see if you get a different error?

    DirectoryEntry ldapConnection = new DirectoryEntry("LDAP://10.9.130.113:667/ou=Users,ou=CorporateStore,ou=Absa,dc=za");

And skip the part where you setting the path via the property.

EDIT: NOTICE It also seems like you have missed a “d” on the dc=za.