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Values from Active Directory to Datatable in C#

Posted on 2006-07-04
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Last Modified: 2008-03-06
Hi!
I'm having some trouble with my code to get data from Active Directory. The code works fine for non optional fields in my AD, but when I try to add a row where one or more columnvalues are blank, the entire row is left out of the DataTable and I cant view it in my DataGridView . Is there anyway to allow blank columnvalues in a DataRow?
Heres my code:

public DataTable doQuery()
        {
           
             System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry("LDAP://mydomain.com");
            System.DirectoryServices.DirectorySearcher mySearcher = new System.DirectoryServices.DirectorySearcher(entry);
            mySearcher.Filter =("(objectClass=user)");
           
            DataTable adTabell = new DataTable("Brukertabell");
            DataColumn adKolonne = adTabell.Columns.Add("Fornavn", typeof(string));
            adKolonne.AllowDBNull = false;
            adKolonne.Unique = true;
            adTabell.Columns.Add("Etternavn", typeof(string));
            adTabell.Columns.Add("Tittel", typeof(string));
            adTabell.Columns.Add("Selskap", typeof(string));
            adTabell.Columns.Add("Sted", typeof(string));
            adTabell.Columns.Add("Mobil", typeof(string));
           
            foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
            {
             
                try
                {
                    System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
               
                    DataRow adRad = adTabell.NewRow();
                    adRad["Fornavn"] = de.Properties["DisplayName"].Value.ToString();
                    adRad["Etternavn"] = de.Properties["GivenName"].Value.ToString();
                    adRad["Tittel"] = de.Properties["Title"].Value.ToString();
                    adRad["Selskap"] = de.Properties["Company"].Value.ToString();
                    adRad["Sted"] = de.Properties["Department"].Value.ToString();
                    adRad["Mobil"] = de.Properties["Mobile"].Value.ToString();
                    adTabell.Rows.Add(adRad);

                }
                catch (Exception e)
                {
                }
               

            }
            System.Windows.Forms.MessageBox.Show("rowCount: " + adTabell.Rows.Count);
                        return adTabell;

        }
    }
0
Comment
Question by:frodehoe
  • 2
3 Comments
 
LVL 12

Expert Comment

by:sumix
ID: 17040232
The DataRow is not the problem.
 If any of the property of the DirectoryEntry instance has a null value you get an exception when you try to convert it to a string, then catch block is entered and the row is not added to the table. You should test each value before setting the field, something like

    if (de.Properties["GivenName"].Value != null)
          adRad["Etternavn"] = de.Properties["GivenName"].Value.ToString();
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LVL 12

Accepted Solution

by:
sumix earned 500 total points
ID: 17040255
Or, simpler, just remove the ToString() conversions:
   adRad["Fornavn"] = de.Properties["DisplayName"].Value;
0
 

Author Comment

by:frodehoe
ID: 17040672
Thanks sumix. Removed the .tostring() and it works like a charm :)
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