Connecting to OpenLDAP from C#

Hi all,

I have a problem. Been pulling my hair out all day with this. Had a number

of errors, but now I am so close. This is connecting to OpenLDAP on a
linux 
box. My app is an ASP.NET app in C#.


            System.DirectoryServices.DirectoryEntry entryPC = new 
System.DirectoryServices.DirectoryEntry();

            entryPC.Path = 
"LDAP://MyLDAPServer389/ou=pens,dc=anotes,dc=com";

            string sFilter = 
String.Format("(&(objectClass=pen)(description={0}))", PenIDTextBox.Text);
            entryPC.AuthenticationType = 
System.DirectoryServices.AuthenticationTypes.Anonymous;

            System.DirectoryServices.DirectorySearcher ds = new 
System.DirectoryServices.DirectorySearcher(entryPC);
            ds.Filter = sFilter;

            ds.SearchScope = System.DirectoryServices.SearchScope.Subtree;

            System.DirectoryServices.SearchResult sr = null;

            bool SRFailed = false;

            try
            {
                sr = ds.FindOne();
            }
            catch(Exception ex)
            {
                SRFailed = true;
            }


The path is correct as I can connect to it with an LDAP Browser.

When I run it, I am dropping into the catch and getting an error "The 
parameter is incorrect", which is about as helpful as praying for it to 
work.


Inside my ou=pens, I have a branch (an endpoint) of serialNumber=0x000....

(hex number). There are two of these. Inside these, I have various 
attributes, 3 objectClass (one of them has the value "pen" and a
description 
attribute with the value that I am searching for.

If I put my sFilter value in my LDAP Browser search routine, then I get
the 
result (but only if I scan the subtree).

Absolutely any help, even if you don't know the answer but possible have 
noticed something I may have missed will be helpful.

Thanks.

-- 
Best regards,
Dave Colliver.
http://www.AshfieldFOCUS.com
~~
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