About LastModificationTime on _AppointmentItem

  • Thread starter Thread starter MB34
  • Start date Start date
M

MB34

I'm finding that when I read the LstModificationTime from some
_AppointmentItems, it is returning a timestamp from the FUTURE!

Now, when you update an item, does the LastModifiedTime get reset for
ALL items? I'm also finding that the same
value is being returned regardless of the item I check.

Any ideas?
 
That property is specific to each item. Modifying one item won't change the
property on any others.

How are you getting that property, what API are you using? What version of
Outlook? If you get the property using the Outlook object model it should be
correct for your local time, assuming the time zones are correctly set up in
both Windows and Outlook. If you read it using a MAPI API you are probably
getting the date/time value in UTC, not adjusted for local time. Inside the
hood that's how all Outlook dates/times are stored.

If you get the same value from every item then either every item was
actually modified at that time or you are doing something wrong.
 
That property is specific to each item. Modifying one item won't change the
property on any others.

How are you getting that property, what API are you using? What version of
Outlook? If you get the property using the Outlook object model it should be
correct for your local time, assuming the time zones are correctly set up in
both Windows and Outlook. If you read it using a MAPI API you are probably
getting the date/time value in UTC, not adjusted for local time. Inside the
hood that's how all Outlook dates/times are stored.
Click to expand...

I'm getting it like this using Delphi:

const
EmptyDispParams: TDispParams = (rgvarg: nil; rgdispidNamedArgs: nil;
cArgs: 0; cNamedArgs: 0);

var
iLCID: Integer;

function GetDispId(const Obj: IDispatch; const Member: WideString;
DispIdPtr: PInteger): Boolean;
begin
Result := Succeeded(Obj.GetIdsOfNames(GUID_NULL, @Member, 1, iLCID,
DispIdPtr));
end;

function InvokePropertyGet(const Obj: IDispatch; Name:
WideString):Variant;
var
intDispId, ArgErr: Integer;
DispParams: TDispParams;
begin
if GetDispId(Obj, Name, @intDispId) then
begin
DispParams := EmptyDispParams;
OleCheck(Obj.Invoke(intDispId,
GUID_NULL,
iLCID,
DISPATCH_PROPERTYGET,
DispParams,
// Using D6 so if you are trying on later
versions
// change this to just Result
@Result,
nil,
// Using D6 so if you are trying on later
versions
// change this to just ArgErr
@ArgErr));
end;
end;


And retrieving with this call:
// OutlookCompareFieldName is a parameter to the function where this
code lies and is
// set to 'LastModificationTime'
AApptCompareFieldValue := InvokePropertyGet(AOutlookAppointmentItem,
OutlookCompareFieldName);

If I inspect the AOutlookAppointmentItem, the LastModificationTime is
the same as the one retrieved using the call above.
The reason I'm doing it this way is so I can pass, by name, which
property I want to retrieve.
If you get the same value from every item then either every item was
actually modified at that time or you are doing something wrong.
Click to expand...

That could not explain how the value returned was in the future. It
was a time stamp several minutes later
than the time on my system. My system time is not several minutes
behind the Exchange server time.
 
Seems our Exchange server was 10 minutes ahead of my system. That
would cause this problem. My system is not on the domain so
I do not get my time synced with the PDC like the Exchange server.

Setting my system time to the same as the Exchange server resolved
the problem I had
 
What do you see in OutlookSpy if you select the appointment in question and
click the Item button?

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