COleDateTime

Hi

I am having some difficulty with the COleDateTime class in that I have a
DateTimePicker ctrl (m_date) and I am trying to initialise
it to the current time. from msdn help I have

DoDataExchange
DDX_DateTimeCtrl(pDX, IDC_LOG_DATE_PICKER, m_date);

Dialog Init
m_date = COleDateTime::GetCurrentTime();


Every time the dialog loads I get an error about "winCtrl5.cpp". I have traced it
and the above line is causing the problem.

Why? I had this working on Friday!


arrrghghghgh!!

Thanks in advance
LittlePerson
LittlePersonAsked:
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AndyAinscowFreelance programmer / ConsultantCommented:
Rebuild all option on build menu.  Does that cure it?
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LittlePersonAuthor Commented:
Nope, I just realised that the assertion comes in Debg mode, in Release mode
everything seems to be fine. That must be why it was working and then not!

Thanks
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AndyAinscowFreelance programmer / ConsultantCommented:
It shouldn't ASSERT in debug mode - after all that is what one uses to test the program and if it fails in debug it is probably unstable at best in release mode, at worst dangerous to the OP system.  
Rebuild all.  Put breakpoint and step in to see what exactly is ASSERTing.
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LittlePersonAuthor Commented:
m_date = COleDateTime::GetCurrentTime();


this is the line that is asserting
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Roshan DavisCommented:
Put this code (m_date = COleDateTime::GetCurrentTime();
) in the Constructor of the Dialog instead of InitDialog. Otherwise *DoDataExchange* might make problems
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LittlePersonAuthor Commented:
sorry for misleading but the code is in the Constructor!
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Roshan DavisCommented:
which line of "winCtrl5.cpp" is giving error...??
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Roshan DavisCommented:
Ohh yes thatz the problem...!!! put that in OnInitDialog

Why becoz, in the time of construction (dialog) the window handle will be invalid, only after the Create statement (after this function , OnInitDialog will take place). So the DateTime control is not cretaed..

Put this code (m_date = COleDateTime::GetCurrentTime();) code in OnInitDialog will solve the problem

Good Luck
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AndyAinscowFreelance programmer / ConsultantCommented:
m_dte is a variable or the line in DoDataExchange
DDX_DateTimeCtrl(pDX, IDC_LOG_DATE_PICKER, m_date);
is wrong.
One can set the value in the ctor.

LittlePersin, have you stepped into the code yet to see where the ASSERT is?
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LittlePersonAuthor Commented:

ASSERT is in "winCtrl5.cpp" line 189

I get assert in constructor at line

m_date = COleDateTime::GetCurrentTime();


i.e.

CSomeDialog dlg;

Stepping in here fires up constructor and bang!

Thanks
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AndyAinscowFreelance programmer / ConsultantCommented:
The DoDataExchange macro
DDX_Control
will map a control variable (CDateTimeCtrl) to a resource ID

the macro you use
DDX_DateTimeCtrl
will map a variable (eg. COleDateTime) to a resource ID

I think you have got them mixed up.
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AndyAinscowFreelance programmer / ConsultantCommented:
If you are using a COleDateTimeCtrl variable you also set the contents with m_ctl.SetTime(COleDateTime::GetCurrentTime());
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LittlePersonAuthor Commented:
I think something else is up. I took the following code and
put it in the InitDialog function. I got the same assertion

COleDateTime dtCurrent;
dtCurrent = COleDateTime::GetCurrentTime();
AfxMessageBox(dtCurrent.Format("Today is %a %b %d, %Y"));


What gives?

Seriously confused
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LittlePersonAuthor Commented:
also it is definitely working in release mode!!!
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AndyAinscowFreelance programmer / ConsultantCommented:
WinCtrl5.cpp line 189 is (at least my copy)
            ASSERT(timeDest.GetStatus() == COleDateTime::valid);


Or rather
BOOL CDateTimeCtrl::GetTime(COleDateTime& timeDest) const
{
      SYSTEMTIME sysTime;
      BOOL bRetVal = TRUE;

      LRESULT result = ::SendMessage(m_hWnd, DTM_GETSYSTEMTIME, 0, (LPARAM) &sysTime);
      if (result == GDT_VALID)
      {
            timeDest = COleDateTime(sysTime);
            bRetVal = TRUE;
            ASSERT(timeDest.GetStatus() == COleDateTime::valid);
      }
      else if (result == GDT_NONE)
      {
            timeDest.SetStatus(COleDateTime::null);
            bRetVal = TRUE;
      }
      else
            timeDest.SetStatus(COleDateTime::invalid);
      return bRetVal;
}

How a COleDateTime variable is calling a CDateTimeCtrl function I don't understand at all.



Try removing your variable with the class wizard, rebuild then recreate your variable with the class wizard, rebuild again and see if it still crashes.
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AndyAinscowFreelance programmer / ConsultantCommented:
?
refund points and accept AndyAinscow
Error !!!!

<refund is OK by me>
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