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Problem with Listing Outlook Contacts

Posted on 2014-02-12
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Last Modified: 2014-04-23
Hi
I'm trying to list some info for Outlook contacts - I want to see how many entries are in the OtherTelephoneNumber field. I'm using Outlook 2003.
My code is below. For the first few users, all worked well.
But for the most recent users, its crashing out on the "For Each olItem In searchFolder" line.
The error message is:
Debug: Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Office.Interop.Outlook.ContactItem'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00063021-0000-0000-C000-000000000046}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

So there are some contacts that must be causing an issue. I really only want Contacts with an OtherTelephoneNumber - is there a way to make the searchFolder only have contacts that have an OtherTelephoneNumber?


Dim stUser As String = ""
      Dim iOtherCount As Integer = 0
      Dim iSearch As Integer = 0
      Dim stStage As String = ""

      Try

         'Start Outlook.
         ' If it is already running, you'll use the same instance...
         Dim olApp As outlook.Application
         olApp = CreateObject("Outlook.Application")

         ' Logon. Doesn't hurt if you are already running and logged on...
         Dim olNs As outlook.NameSpace
         olNs = olApp.GetNamespace("MAPI")
         olNs.Logon()

         Dim folderContacts As outlook.MAPIFolder = olNs.GetDefaultFolder(outlook.OlDefaultFolders.olFolderContacts)
         Dim searchFolder As outlook.Items = folderContacts.Items
         Dim olItem As outlook.ContactItem
         Dim Updated As String = ""
         Dim counter As Integer = 0

         For Each olItem In searchFolder
            If olItem.Class = outlook.OlObjectClass.olContact Then
               stUser = olItem.FullName
               If Not (olItem.OtherTelephoneNumber = Nothing) Then
                  iOtherCount += 1
                  Add_Text(olItem.FullName & " - " & olItem.OtherTelephoneNumber, False)
               End If
               iSearch += 1
            End If
         Next

         MsgBox("Complete: " & counter & "   Searched: " & iSearch)

      Catch ex As Exception
         MsgBox(stStage & vbCrLf & ex.Message, MsgBoxStyle.Critical, "User Update: " & stUser & " Other Count = " & iOtherCount & " Searched: " & iSearch)
         Add_Text(ex.Message, True)
      End Try

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Question by:jdhackett
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CodeCruiser earned 2000 total points
ID: 39853664
I would suggest that you change your loop from For Each (because it is currently trying to convert items at that stage) to a For i loop. Example below


        Dim objOutlook As Outlook._Application
        objOutlook = New Outlook.Application
        Dim objNS As Outlook._NameSpace = objOutlook.Session
        Dim objContacts As Outlook.MAPIFolder = _
            objNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderContacts)
        Dim objItems As Outlook._Items = objContacts.Items
        Dim iCount As Int16 = objItems.Count
        Dim i As Int16
        For i = 1 To iCount
            If TypeOf (objItems.Item(i)) Is Outlook.ContactItem Then
                Console.WriteLine(objItems.Item(i).Fullname)
            End If
        Next

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