C / C++ / MFC Discussion Boards

_Iterator_base sometimes struct, sometimes class

Federico Milano9-Jun-06 4:51

9-Jun-06 4:51

Hi,

I'm migrating a project from VS 2003 to VS 2005. As always, exporting templates (instantiations of them) is a hard work. The problem is that I'm exporting an std::iterator implementation and, to avoid warnings, I have to export also its base classes, for example: _Iterator_base. The problem is that in release, this is a struct, and in debug this is a class!!! Do you know if there's a workaround other than doing another #ifdef...??

I'll really appreciate any clue!

Thanks in advance,

Federico

problem with dialog procedure

fury 849-Jun-06 4:47

fury 84

9-Jun-06 4:47

I have a dialog box that I would like to increse a variable everytime a button is pushed, but instead once the button is pushed the variable is set to 2376868 everytime. Using message boxes to debug a little I determined that the variable seems to randomly increse in the WM_COMMAND part of my message loop. My dialog procedure looks something like:

BOOL CALLBACK dlgProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
     int number;
     switch (msg)
     {
            case WM_INITDIALOG:
            /* some stuff to set value of number*/
            case WM_COMMAND:
                 switch (LOWORD(wParam))
                 {
                        case ID_REGISTER:
                             number += 1;
                             EndDialog(hwnd, 0);
                        break;
                 }
            break;
            case WM_CLOSE:
                 EndDialog(hwnd, 0);
            break;
            default: 
                  return FALSE;
     }
     return TRUE;
}

Any thoughts on how to fix this? Thanks

-Matt

Re: problem with dialog procedure

David Crow9-Jun-06 5:28

David Crow

9-Jun-06 5:28

number has not been initialized.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: problem with dialog procedure

fury 849-Jun-06 10:41

fury 84

9-Jun-06 10:41

case WM_INITDIALOG:            
/* some stuff to set value of number*/

number isn't initialized but the value is stored from an INI file within WM_INITDIALOG

Re: problem with dialog procedure

David Crow9-Jun-06 10:46

David Crow

9-Jun-06 10:46

Then you must change it from auto to static.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: problem with dialog procedure

Viorel.9-Jun-06 5:38

Viorel.

9-Jun-06 5:38

You number variable is a non-static local one (in addition, it is not initialized), therefore its value will be lost after you exit the dialog procedure.

If you need it only within the function, declare it as static, and initialize:

BOOL CALLBACK dlgProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    static int number = 0;
    ...
}

If you need it outside, then move it on file level.

Re: problem with dialog procedure

fury 849-Jun-06 10:48

fury 84

9-Jun-06 10:48

making it a static variable fixed the problem...thanks a lot!

control

yogendra kaushik9-Jun-06 4:22

yogendra kaushik

9-Jun-06 4:22

how the datetime picker store date
as edit box can store SetDlgItemText()

Please mail me

Re: control

David Crow9-Jun-06 4:31

David Crow

9-Jun-06 4:31

yogendra kaushik wrote:
how the datetime picker store date

Use CDateTimeCtrl::SetTime(), or if you are not using MFC, send the control a DTM_SETSYSTEMTIME message.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

problem in inserting image into the database

maharaja pandian9-Jun-06 4:14

maharaja pandian

9-Jun-06 4:14

hi,
i develop one application in VC++-MFC 6.0 ,
this application is responsible for inserting image into the database (oracle)-ODBC.
but when i try to insert a image file , it through a error like
"Data type conversion error."
////////////////////////////////////////////////////////////////////////
CDaoDatabse db;
CDaoRecordset recset(&db);
void CDBODBC::InsertintoDB();
{
CByteArray BlobFile;
BlobFile.RemoveAll(); // I clear the Array
CFile aFile("image.jpg",CFile::modeRead);
BlobFile.SetSize(aFile.GetLength());
aFile.Read(BlobFile.GetData(),aFile.GetLength());
aFile.Close();
COleVariant aVar(BlobFile);
CString Sql = "SELECT * FROM sample3";
db.Open("abc",FALSE,FALSE,"ODBC;UID=abcWD=abc;DSN=abc;");
recset.Open(AFX_DAO_USE_DEFAULT_TYPE,Sql,dbAppendOnly);
// bool b=recset.CanUpdate();
recset.AddNew();

recset.SetFieldValue("[num]","6"); //varchar field
recset.SetFieldValue("[photo]",aVar); //BLOB field -image field
recset.Update();
recset.Close();
db.Close();

}
/////////////////////////////////////
it works for Access database ..
but i got error in oracle...
"Data type conversion error."

Try again and again,
At last you will say
I don't know the meaning for impossible.,.

Re: problem in inserting image into the database

David Crow9-Jun-06 4:36

David Crow

9-Jun-06 4:36

See if this helps.

maharaja pandian wrote:
CDaoRecordset recset(&db);

In addition, if you would derive a class from CDaoRecordset, the RFX_Binary() code would handle the details for you.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: problem in inserting image into the database

maharaja pandian9-Jun-06 20:26

maharaja pandian

9-Jun-06 20:26

tnx for ur reply,
but COleVariant is used to store the "OLE object" datatype in .MDB database.
when i use oracle DB , the corresponding BLOB datatype is not get matched with COleVariant class in VC++.
I got the error like " Data type conversion error"

can u please send the details to store the oracle BLOB value
throuh VC++.

Try again and again,
At last you will say
I don't know the meaning for impossible.,.

Re: problem in inserting image into the database

Viorel.9-Jun-06 4:40

Viorel.

9-Jun-06 4:40

Perhaps for long data type as BLOB you have to use CDaoQueryDef instead of CDaoRecordset. See the problem with BLOB type at http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B168447[^].

Re: problem in inserting image into the database

maharaja pandian9-Jun-06 20:25

maharaja pandian

9-Jun-06 20:25

Problem Writing bitmap info File

Reji_Kumar9-Jun-06 4:08

Reji_Kumar

9-Jun-06 4:08

--------------------------------------------------------------------------------

I have an HBITMAP. From that I construct a CBitMap obj and Using GetBitMapBits, get the Byte info into a byte array. I also fill up the BITMAPFILEHEADER and BITMAPINFOHEADER. Then i first write the BITMAPFILEHEADER, then the BITMAPINFOHEADER and then the BYte Array of the bitmap into a .bmp file. My bmp comes up but its upside down. I.e the generated .bmp is upside down of the original image. Where am i mistaken?

Reji Kumar,
Software Engineer,
India.

Re: Problem Writing bitmap info File

Viorel.9-Jun-06 4:31

Viorel.

9-Jun-06 4:31

Perhaps, instead of obsolete GetBitmapBits, you should use ::GetDIBits? Compare you writing procedure with this one[^].

Re: Problem Writing bitmap info File

C^hris L^osinger9-Jun-06 5:27

C^hris L^osinger

9-Jun-06 5:27

BMPs are stored upside down. (so are DIBs, and a BMP is a BITMAPFILEHEADER followed by a DIB)

Cleek | Image Toolkits | Thumbnail maker

Adding static control to childvew

rajeev829-Jun-06 3:35

rajeev82

9-Jun-06 3:35

Hi all,
Instead of opening a Static control(which is subclassed) in a Dialog box,i want to open it in the Mainframe window.
But when i create a variable of the class(subclassed) in the MainFrame(derived from CFrameWnd)and call the Create(with all right parameters) function the control is not visible in the Mainframe window Cry | :((

i'm not able to figure out the reason Sleepy | :zzz:

y itz not showing up.It'll be really great if someone can help me out in this.
Thanks in advance,
rajeev

Re: Adding static control to childvew

Viorel.9-Jun-06 3:53

Viorel.

9-Jun-06 3:53

When you create the control with Create, be sure the WS_VISIBLE window style is specified, for instance:

myStatic.Create("Test", WS_BORDER | WS_VISIBLE, CRect(30,30,100,100), this, 12345);

Re: Adding static control to childvew [modified]

rajeev829-Jun-06 3:55

rajeev82

9-Jun-06 3:55

well all those properties have been set properly but still i'm not able to get it right..

-- modified at 9:55 Friday 9th June, 2006

Re: Adding static control to childvew [modified]

Viorel.9-Jun-06 4:05

Viorel.

9-Jun-06 4:05

Is your variable for static control defined as a class member, or as a local variable in CMainFrame::OnCreate?

In order to work, you have to have a line like CMyStatic mMyStatic; within frame class declaration (in *.h file), and a line like mMyStatic.Create(...) somewhere at the end of CMainFrame::OnCreate function. Where are you creating the control?

Re: Adding static control to childvew [modified]

Cedric Moonen9-Jun-06 4:06

Cedric Moonen

9-Jun-06 4:06

What type of project are you using ? SDI or MDI ? If it's SDI, I think you have to create it on the view, and not on the mainframe.

Cédric Moonen
Software developer

Charting control

Re: Adding static control to childvew

rajeev829-Jun-06 18:19

rajeev82

9-Jun-06 18:19

its an SDI application....
the code i've used is
CLed m_led; ///declared in mainframe.h
m_led.Create(...);// in the OnCretae of mainframe.cpp

here CLed is a class derived from CStatic which gives some special features to a static control...

Re: Adding static control to childvew

Cedric Moonen9-Jun-06 22:17

Cedric Moonen

9-Jun-06 22:17

Did you read and tried the solution that people gave you ? I'm almost sure that Viorel got the point. Did you tried it ?

Cédric Moonen
Software developer

Charting control

Open Dialog "Filter for file names"

Nitefall20609-Jun-06 3:21

Nitefall2060

9-Jun-06 3:21

Hey All,

I am using the common open and close dialog boxes used in windows, i.e. OPENFILENAME, GETFILENAME. I can get them to open in the desired directory and have created a filter to display my applications propriatary file type. My problem is that I need to create a filter to display only certian files of that file type.

Example: I have 5 files using .txt

Using my current filter all files of type .txt will be displayed

bob.txt
foo.txt
bob_again.txt
bar.txt
bob_yet_again.txt

I want to be able to display only files that have bob in the title

bob.txt
bob_again.txt
bob_yet_again.txt

I cannot find any information on if this is even possible.

Does anyone know if this is possible?
If so how is it accomplished?

Thanks for your time

Nitefall------------Lost in the land of Win32 WTF | :WTF:

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