help! Breakpoint cannot be set - C / C++ / MFC Discussion Boards

Re: Displaying a string in a CStatic control

Renjith Ramachandran11-Sep-02 9:47

11-Sep-02 9:47

there is 2 ways
1)((CStatic*)GetDlgItem(ResourceId of ur control here))->SetWindowText("Enter your text here") ;

2) make a control variable with classwizard and
your controlvariable.SetWindowText("your text here") ;

this will work....

WUSIWUG

Re: Displaying a string in a CStatic control

Carlos Antollini11-Sep-02 9:47

Carlos Antollini

11-Sep-02 9:47

I don't understand that difficult is that...
Use SetWindowText
May be your question is differente.

Saludos
Best Regards...

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Displaying a string in a CStatic control

Luis E. Cuadrado11-Sep-02 10:06

Luis E. Cuadrado

11-Sep-02 10:06

Hello again:
I tried SetWindowText and it worked. I tryied the 1st way that renjith pointed out and it wasn't working (Maybe I forgot something). Then I tried the second way (Creating the member variable with ClassWizard) and called SetWindowText and it worked.
I know the question sounded very newbie(or stupid), the reason that I asked is because I'm new in MFC and all this Windows 32 API programming stuff. Thanks to this web site, I leanred a lot of stuff.

Thanks for your help guys,

Regards,
Luis E.

PS
Saludos Carlos, gracias por tu ayuda.

Luis E. Cuadrado
Blush | :O

)

Re: Displaying a string in a CStatic control

Carlos Antollini11-Sep-02 10:13

Carlos Antollini

11-Sep-02 10:13

You are welcome....
Luis, Bien venido

Cheers

Carlos Antollini.
Sonork ID 100.10529 cantollini

odd behavior with an #import statement

ns11-Sep-02 9:23

11-Sep-02 9:23

I have a #import for msado25.tlb in one file, and the namespace is defined as "ADO" . SO all stuff in this file has to be addressed as ADO::something. Now I had another database class that was referring to the ADO stuff as ADODB::. All was working fine until I rebuilt the project (Rebuild all). Now it told me that it didnt know what ADODB was, and finally I had to put my #import statement in that file as well, plus change all the ADODB's to ADO:: Question is, why in the world was it working fine until I rebuilt all? I cannot explain this!
Any clues?
Thanks,
ns

Re: odd behavior with an #import statement

Ranjan Banerji11-Sep-02 9:33

Ranjan Banerji

11-Sep-02 9:33

Because the file that was using it earlier and was not rebuilt. So it had all the information it needed. Now ith your change when you did a rebuild you created a conflict.

Try and put your import in a single file and make sure that the file is included where ever it is needed rather than making multiple imports of the same library.

Re: odd behavior with an #import statement

ns11-Sep-02 9:34

11-Sep-02 9:34

How dangerous is it to have #import twice declared. Its not too clear to me how to get it consolidated to one statement. Ones in an ADOX class, and ones in an ADO class. I really dont see why I should put adox.h into ado.h, but it I'm playing with fire I'll work at this. So really, am I going to get in unexpected trouble here?
Thanks,
ns

help! Breakpoint cannot be set

ns11-Sep-02 8:10

11-Sep-02 8:10

All of a sudden anywhere (really anywhere at all in valid places!) I put a breakp[oint in my program it says "breakpoint cannot be set, execution will stop at the beggining of the program" .Then the breakpoint goes white and indeed execution stops at some odd place. WHat can I do to get out of this situation?
thanks
ns

Re: help! Breakpoint cannot be set

C^hris L^osinger11-Sep-02 9:00

C^hris L^osinger

11-Sep-02 9:00

close VC, delete your apps .NCB file, rebuild all.

-c

Greenspun's Tenth Rule of Programming:
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."

Re: help! Breakpoint cannot be set

ns11-Sep-02 9:23

11-Sep-02 9:23

Thank you very much!
ns

An ADO question

dsfasdfadsfasdfadsf11-Sep-02 8:10

dsfasdfadsfasdfadsf

11-Sep-02 8:10

Assume that when certain query is executed, the record set object will contain 20 results. But i want my record set object to contain results from 11 to 20 among all these. How can i do so ???

Re: An ADO question

Nick Parker11-Sep-02 8:29

Nick Parker

11-Sep-02 8:29

I have never done this in VC++ before, however the ADO object should be essentially the same Unsure | :~

. Here is a link on how you can page your recordset in ASP, again many of the ideas should be the same, such as the usage of the AbsolutePage, and PageCount properties.

Paging a recordset [^]

HTH

Nick Parker

Re: An ADO question

Carlos Antollini11-Sep-02 9:50

Carlos Antollini

11-Sep-02 9:50

You need to use pagesize to 10... and move between pages and records...

Best Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Template class with unlimited parameters (Advanced)

conrad Braam11-Sep-02 8:06

conrad Braam

11-Sep-02 8:06

I want to create a template class, with unlimited # parameters, basically I need a special template that is like a collection, but I can access each member directly.

I want to create something like this
class myclass : public mybaseclass
{
public:
myclass();

DWORD myvalue1;
DWORD myvalue2;
DWORD myvalue3;
};
I need to be able to have a different # of members "myvalue1" etc. each time.
the difficult part is that the members must also be used in a function, that is part of the template also
myclass::ReadMembers()
{
myvalue1=1;
... etc
}

so that I do not have to enter them again, I know macros let U do this kind of thing, but they do not work to well for this application so far.

Templates are foweful, but not enough, I even looked at BEGIN_MESSAGE_MAP macro from MFC, because that idea might do it, but it can't as far as I can see. Confused | :confused:

GRRR.... Maybe I need a 4GL language, not C++.

Conrad - conradb@adroit.co.za
Always do badly to start off, that way when you get the hang of it suddenly, everyone is surprised.

Re: Template class with unlimited parameters (Advanced)

Joaquín M López Muñoz11-Sep-02 8:25

Joaquín M López Muñoz

11-Sep-02 8:25

Something like this should work (I don't have a compiler handy, so beware of errors):

template <int n> class C;
 
template <> class C<0>
{
public:
  void read_members()
  {
  }
};
 
template <int n> class C: public C<n-1>
{
  typedef C<n-1> super;
public:
  int value;
  void read_members()
  {
    value=1;
    super::read_members();
  }
};

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Multicolumn listbox

danag11-Sep-02 7:44

danag

11-Sep-02 7:44

I have a requirement to fill the listbox with 2 columns.

I know how to implement a listbox with single column?

Could someone tell me how to do it?

Thanks

Re: Multicolumn listbox

C^hris L^osinger11-Sep-02 7:48

C^hris L^osinger

11-Sep-02 7:48

use a CListCtrl instead.

-c

Greenspun's Tenth Rule of Programming:
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."

Re: Multicolumn listbox

danag11-Sep-02 7:51

danag

11-Sep-02 7:51

Thanks for a quick response. I will try listcontrol.

Re: Multicolumn listbox

danag11-Sep-02 8:47

danag

11-Sep-02 8:47

I am getting an assertion failure in the last line of this function. When I click the 'Ignore' button, I am getting a message box with the message
'Unsupported operation was attempted'.
I donot have any clue to fix it?

Pl help me.

BOOL displaydlg::OnInitDialog()
{
CListCtrl *plistb = (CListCtrl *) GetDlgItem(IDC_LIST2);

LV_ITEM lvI;
// Initialize LV_ITEM members that are common to all items
lvI.mask = LVIF_TEXT | LVIF_PARAM | LVIF_STATE;
lvI.state = 0;
lvI.stateMask = 0;
lvI.iImage = 0;

CString str;

int i =0;
if (m_pSet1->IsOpen()) {
m_pSet1->Close();
}
m_pSet1->Open();

while (!m_pSet1->IsEOF()) {

lvI.iItem =i;
lvI.iSubItem = 0;
str = m_pSet1->m_Type;
lvI.pszText = (LPSTR)LPCTSTR(str);

lvI.cchTextMax = MAX_ITEMLEN;
lvI.lParam = (LPARAM) i;
if (plistb->InsertItem(&lvI) == -1)
AfxMessageBox(_T("ListSelectData::FillListCtrl error"), MB_OK);

i++;
m_pSet1->MoveNext();
}

return CDialog::OnInitDialog();
}

Re: Multicolumn listbox

C^hris L^osinger11-Sep-02 9:03

C^hris L^osinger

11-Sep-02 9:03

are there any records in the recordset?

-c

Greenspun's Tenth Rule of Programming:
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."

Re: Multicolumn listbox

danag11-Sep-02 9:13

danag

11-Sep-02 9:13

Yes, having 3 records.
If i comment out return CDialog::OnInitialUpdate() and return TRUE, then I am not getting this assertion failure. Only after the dailog with the listctrl filled with the records, the assertion failure appears.

Re: Multicolumn listbox

C^hris L^osinger11-Sep-02 10:32

C^hris L^osinger

11-Sep-02 10:32

try this:

call CDialog::OnInitDialog first in your function (not last). then return FALSE.

-c

Greenspun's Tenth Rule of Programming:
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."

Re: Multicolumn listbox

danag11-Sep-02 11:02

danag

11-Sep-02 11:02

No, it doesnot work.

Re: Multicolumn listbox

C^hris L^osinger11-Sep-02 11:04

C^hris L^osinger

11-Sep-02 11:04

what happens?

Greenspun's Tenth Rule of Programming:
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."

Re: Multicolumn listbox

danag11-Sep-02 11:07

danag

11-Sep-02 11:07

Getting an assertion failure immediately. If I click 'Ignore' button, an message box appears with msg 'unsupported operation was attempted'

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.