InvalidCastException when using Custum Form (OL2003) VS.2003 (2005)

[Frank Sharp]

Running XP OL2003, VS 2002 pro, I wrote an Outlook Addin.. worked fine.
Did something like: process AppointmentItems based on a Custom Form
(MessageClass= IPM.Appointment.Reservation) like:
Dim objAppts As Items
Dim objAppt As AppointmentItem
objNS = objApplication.GetNamespace("MAPI")
objAppts =
objNS.GetDefaultFolder(OlDefaultFolders.olFolderCalendar).Folders.Item("Reservations").Items
objAppts.IncludeRecurrences = True
objAppt = objAppts.Item(1)

(just an example.. I know how to write AddIns..everything worked fine..)

Then: Installed VS 2005 Pro. From this moment on I got an
InvalidCastException at this line:
objAppt = objAppts.Item(1)
(still running this AddIn under VS 2002.. did nothing with VS 2005, just
installed it)

Wrote a Win.exe to test this; found out: after installing VS2005 I get the
InvalidCastException in VS2002 if the messageclass is not exactly
“IPM.Appointment”; before it also worked with “IPM.Appointment.Reservation”.
To prevent some answers that won’t help:
This AddIn uses Framework 1.1:
'DefaultDomain': 'c:\windows\microsoft.net\framework\v1.1.4322\mscorlib.dll'
geladen, keine Symbole geladen.
'Domain2': 'c:\windows\microsoft.net\framework\v1.1.4322\mscorlib.dll'
geladen, keine Symbole geladen.
...and so on..(german version..)
TypeName(objAppts.Item(1)) is "AppointmentItem" (no distribution list in
this folder..just AppointmentItems with messageclass
IPM.Appointment.Reservation.. I know all this standard answers..and it
worked fine before installing VS2005)

What I tried so far: uninstalled VS 2005, uninstalled Framework 2.0.. no
luck.. same result..
Uninstalled Framework 1.1, 1.0; reinstalled Framework 1.0, 1.1..Setup repair
of VS 2002.. no luck..

Please help.
Thank you, Frank

 

[Ken Slovak - [MVP - Outlook]]

That sounds like a bug, it should be checking for prefix of MessageClass,
not the entire MessageClass string. Possibly too anal type checking.

Have you tried casting the item into an AppointmentItem?

 

[Frank Sharp]

Thank you for your quick reply.
Yes, I tried Ctype and directcast,
also tried to Dim objAppt as Object..., tried to use ItemsClass and
ApointmentItemClass instead ..and so on..
...same result.. and as I said, everything worked fine till I installed VS
2005.
My main problem now is that I can't work on this program now on this
machine,
even after uninstalling VS 2005 and Framework 2.0.
Although.. uninstalling VS 2005 doesn't uninstall everything..
I still see the Device Emulator, Document Explorer, SQL Server 2005, SQL
2005 Mobile Dev Tools,
SQL Native Client, SQL VSS Writer, Visual J+ 2.0. Redist. Package, Visual J#
2.0 Redist. Lang.Pack -DEU (german),
MSXML 6.0 Parser.

I did a full install of VS 2005. Maybe I should try to uninstall this left
over components.. I didn't do it because I'm not sure if I should do it in a
special order and I don't want to mess up the machine completly..

Thank you, Frank

 

[Frank Sharp]

Additional Information:
I used a Outlook.exe.config file for Outlook to force the use of Framework
1.1 for my AddIn:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v1.1.4322"/>
</startup>
</configuration>

I tried it now with a simple Win.exe and Framework 1.0 with the same result:
(If I use the OlDefaultFolders.olFolderCalendar Items I get just
AppointmentItems with MessageClass IPM.Appointment and no error message..)

Private Sub GetAppointments()
Dim objApplication As Application
Dim objNS As [NameSpace]
Dim objAppts As Items
Dim objAppt As AppointmentItem
Try
objApplication = CreateObject("Outlook.Application")
objNS = objApplication.GetNamespace("MAPI")
objAppts =
objNS.GetDefaultFolder(OlDefaultFolders.olFolderCalendar).Folders.Item("RB").Items
objAppts.IncludeRecurrences = True
Debug.WriteLine(objAppts.Item(1).messageclass)
objAppt = CType(objAppts.Item(1), AppointmentItem)
MsgBox("OK")
Catch CastException As System.InvalidCastException
MsgBox("Error: " & CastException.Message)
Debug.WriteLine(CastException.Message)
Catch ex As System.Exception
MsgBox("Error: " & ex.Message)
Finally
objAppt = Nothing
objAppts = Nothing
objNS = Nothing
objApplication = Nothing
End Try
End Sub

'DefaultDomain': 'c:\windows\microsoft.net\framework\v1.0.3705\mscorlib.dll'
geladen, keine Symbole geladen.
'TestOLCastError': 'C:\Dokumente und Einstellungen\Franz.Scharf\Eigene
Dateien\Visual Studio-Projekte\TestOLCastError\bin\TestOLCastError.exe'
geladen, Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\system.windows.forms\1.0.3300.0__b77a5c561934e089\system.windows.forms.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\system\1.0.3300.0__b77a5c561934e089\system.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\system.drawing\1.0.3300.0__b03f5f7f11d50a3a\system.drawing.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\accessibility\1.0.3300.0__b03f5f7f11d50a3a\accessibility.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\microsoft.visualbasic\7.0.3300.0__b03f5f7f11d50a3a\microsoft.visualbasic.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\microsoft.office.interop.outlook\11.0.0.0__71e9bce111e9429c\microsoft.office.interop.outlook.dll'
geladen, keine Symbole geladen.
'TestOLCastError.exe':
'c:\windows\assembly\gac\system.xml\1.0.3300.0__b77a5c561934e089\system.xml.dll'
geladen, keine Symbole geladen.
IPM.Appointment.Reservierung
'TestOLCastError.exe':
'c:\windows\assembly\gac\mscorlib.resources\1.0.3300.0_de_b77a5c561934e089\mscorlib.resources.dll'
geladen, keine Symbole geladen.
Die angegebene Umwandlung ist ungültig. (<< that's just the german
errormessage for an InvalidCastError)
Das Programm "[2420] TestOLCastError.exe" wurde mit Code 0 (0x0) beendet.

 

[Frank Sharp]

After uninstalling Device Emulator, Document Explorer, SQL Server 2005, SQL
2005 Mobile Dev Tools,
SQL Native Client, SQL VSS Writer, Visual J+ 2.0. Redist. Package, Visual J#
2.0 Redist. Lang.Pack -DEU (german),
and MSXML 6.0 Parser I got rid of the InvalidCastError.



I didn't have the time to check out which one of these components caused the
problem.



If somebody knows where and how to report this Bug, please let me know.

I will follow this thread..

Hope it helps somebody with the same problem.



Regards, Frank.