DirectoryServicesCOMException

Question

User-1152693950 posted

Hello all, I have a web app that looks up a users email in AD and returns the email so the app can send a confirmation email. The lookup has been working fine for two weeks, but recently has started throwing an exception. 

System.DirectoryServices.DirectoryServicesCOMException

[System.DirectoryServices.DirectoryServicesCOMException]
Inner Exception
   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 JobDB.pullestimatenum.JobInsertedSql(Object sender, SqlDataSourceStatusEventArgs e) in C:\JobDB\JobDB\pullestimatenum.aspx.cs:line 106
   at System.Web.UI.WebControls.SqlDataSourceView.ExecuteDbCommand(DbCommand command, DataSourceOperation operation)
   at System.Web.UI.DataSourceView.Insert(IDictionary values, DataSourceViewOperationCallback callback)
   at System.Web.UI.WebControls.FormView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup)
   at System.Web.UI.WebControls.FormViewRow.OnBubbleEvent(Object source, EventArgs e)
   at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

This is the code I am using to get the email:

                    //Send user email
                    DirectorySearcher searcher = new DirectorySearcher();
                    searcher.Filter = string.Format("sAMAccountName={0}", User.Identity.Name.Substring(Request.LogonUserIdentity.Name.LastIndexOf(@"\") + 1));
                    SearchResult user = searcher.FindOne();
                    string emailAddr = user.Properties["mail"][0].ToString() ?? "";

Does anyone see anything wrong with this code? I cannot figure out why this would have started all of a sudden?

Edit: I tried restarting the website, recycling the application pool, and republishing the website and it is still not working. It is fine when I debug it from my dev machine.

Thanks,
Brennan 

Answer 1

User1515728814 posted

Hi,

I think the problem is that the server was looking at the wrong AD controller. It had to be written out COMPLETELY.

Answer 2

User-972150373 posted

I have the same error and I checked the names of the DC. The scenario is that I searched the groups (pimarios and nested) of a user and domain users to work perfectly but the other goes down when you run the statement: ds.FindAll (). This is the code

 public SecurityGroups (string sAMAccountName, DirectoryEntry SearchRoot)  {  if (null == SearchRoot)  throw new ArgumentNullException ("SearchRoot");

 _searchRoot = SearchRoot;

 FindOne (String.Format ("(& (objectCategory = person) (sAMAccountName = {0}))" sAMAccountName));              }

 private void FindOne (string ldapFilter)  {  DirectorySearcher ds = new DirectorySearcher (_searchRoot, ldapFilter);

 using (SearchResultCollection src = ds.FindAll ())  {  if (src.Count> 0)  _userResult = src [0];  }

 if (null == _userResult)  throw new ArgumentException ("User not found");  }

 Both groups are by trusting relationship. and I see the simple (not groups nidados) utizando other code falls.

 There are groups in both domains and do not know if that will be affecting.

Answer 3

User-1152693950 posted

I ended up redoing how I was contacting Active Directory, and it is now working.