C# Error when calling MAPI.Session.Logon()

  • Thread starter Thread starter Johan Machielse
  • Start date Start date
J

Johan Machielse

Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
 
First of all CDO 1.21 is not supported for use with any managed code, so if
it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first 2
arguments to Logon().
 
Ken,

thank you for your quick answer, but now if you want to create an add-in for
Outlook 2003/2007 which changes the color labels of the appointments in a
calendar, what is than the best way to solve this (I want to use .NET to
create the plug-in, but CDO 1.21 is not supported...)?

Thank you in advance,

Johan Machielse
Avanade



Ken Slovak - said:
First of all CDO 1.21 is not supported for use with any managed code, so if
it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first 2
arguments to Logon().




Johan Machielse said:
Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
Click to expand...
Click to expand...
 
Or, better yet, set Session.MAPIOBJECT property to Namespace.MAPIOBJECT from
OOM to make sure CDO 1.21 and Outlook share the same MAPI session.

--
Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool
-
Ken Slovak - said:
First of all CDO 1.21 is not supported for use with any managed code, so
if it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first
2 arguments to Logon().




Johan Machielse said:
Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
Click to expand...
Click to expand...
 
Outlook 2007 exposes AppointmentItem.PropertyAccessor object that lets you
set MAPI properties.
In the older versions of Outlook you will need to use Extended MAPI or CDO
1.21 (neither is supported in .Net) or <plug> Redemption (url below) </plug>

--
Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool
-
Johan Machielse said:
Ken,

thank you for your quick answer, but now if you want to create an add-in
for
Outlook 2003/2007 which changes the color labels of the appointments in a
calendar, what is than the best way to solve this (I want to use .NET to
create the plug-in, but CDO 1.21 is not supported...)?

Thank you in advance,

Johan Machielse
Avanade



Ken Slovak - said:
First of all CDO 1.21 is not supported for use with any managed code, so
if
it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first
2
arguments to Logon().




Johan Machielse said:
Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
Click to expand...
Click to expand...
Click to expand...
 
Hi Ken,

I figured out what how the Logon method has to be called:

mapiSession.Logon("Default Outlook Profile",
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value);
It works!

Regards,

Johan Machielse
Avanade

Ken Slovak - said:
First of all CDO 1.21 is not supported for use with any managed code, so if
it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first 2
arguments to Logon().




Johan Machielse said:
Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
Click to expand...
Click to expand...
 
You seem to have it solved now, but for things like that I use the
Redemption library that Dmitry mentioned in his post. It does everything CDO
did and a whole lot more.
 
That will break if the user has more than one profile and a non-default
profiel is used.
Setting the MAPIOBJECT property (Outlook 2002 and up) will work much better.

--
Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool
-
Johan Machielse said:
Hi Ken,

I figured out what how the Logon method has to be called:

mapiSession.Logon("Default Outlook Profile",
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value,
System.Reflection.Missing.Value);
It works!

Regards,

Johan Machielse
Avanade

Ken Slovak - said:
First of all CDO 1.21 is not supported for use with any managed code, so
if
it doesn't work then you won't get any help.

That said, you could try using null strings instead of null for the first
2
arguments to Logon().




Johan Machielse said:
Dear reader,

See next piece of code (written in C#):

MAPI.Session mapiSession = new MAPI.Session();
mapiSession.Logon(null, null, false, false, 0, false, "");

The call mapiSession.Logon() throws the following exception:
[Collaboration Data Objects - [E_INVALIDARG(80070057)]

What can I do to solve this problem; which arguments do I have to pass?

Thank you in advance,

Johan Machielse
Avanade
Click to expand...
Click to expand...
Click to expand...
 
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