C / C++ / MFC

[Hi! Programs CMOS Boot from USB ]

26-May-09 0:45

Interesting - when I try an equivalent bit of code:

// Bring in ADO
#import "libid:B691E011-1797-432E-907A-4D8C69339129" no_namespace rename("EOF", "adoEOF")

// Later, in some code
   _RecordsetPtr rs;
   rs.CreateInstance(__uuidof(Recordset21));

   _variant_t connstr("Data Source= LibDB;"";,"";");
   _variant_t sqlQuery("SELECT * FROM lib_book_details ORDER BY ISBN");
   rs->Open(sqlQuery, connstr, adOpenDynamic, adLockOptimistic, adCmdText);

it compiles successfully with VS2008. I would use Visual Studio's 'Go To Declaration' feature (right-click on Open) to see how your Open method is declared.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Read List values

Davitor25-May-09 18:29

Davitor

25-May-09 18:29

Hi All

How can i read List control CString values?Plz help me

Re: Read List values

_AnsHUMAN_ 25-May-09 18:33

_AnsHUMAN_

25-May-09 18:33

CListCtrl::GetItemText[^]

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

tuan111125-May-09 17:24

tuan1111

25-May-09 17:24

Vietnam I
The level of the average programmer.
Sorry, because I asked many questions.
Assembler too difficult, I do not know it.
I see the bochs-2.4-msvc-src but I do not know.
Please, help me Who wrote the CMOS Boot from USB to 1
Partition of the HDD is divided into 4 Partition.Using
memory: 510K.
Boot-> create 1 window with Style, interface (GUI) by
my style + 1 ImageButton with event: Shutdown
computer.On window that displays mouse position.
All use VC6.Please, sourcecode no book
Vietnam
Thank you very much!
Vietnam is very beautiful country to invite me.
Smile | :)

Local symbols of a shared library

sheeri manik25-May-09 14:44

sheeri manik

25-May-09 14:44

I am building my application with the standard PNG shared
library , libpng.so.
But at the time of linking it is giving me undefined references error pertaining to
some symbols.

When I checked the object file(libpng.so) with the "nm" command
I saw that these variables were local variables of the library.

I want to know if there is any linking option that I can use
to be able to access them during the linking ?

Re: Local symbols of a shared library

CPallini25-May-09 20:41

CPallini

25-May-09 20:41

If my understanding is correct 'local' means 'not exported', i.e. 'private'. Why do you want to gain access to private symbols?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Please help with MFC dialog

Ryuk199025-May-09 12:50

Ryuk1990

25-May-09 12:50

I'm working on a pizza store in VS 2005. I set up the design and member variables correctly(I think). I have no idea how to work on the coding now. I have radio buttons for the size of the pizza and check boxes for the toppings. I also have edit boxes for the name, address, and phone number. Also, I should add a calculate button. How would you set up a member variable for a button? When I click the button I want it to display in the summary edit box the person's info first, then the size and toppings(along with their prices) and then the total price. Can anyone help? Does anyone maybe know of any free tutorials on dialog-based stores?

Stuart Dootson25-May-09 14:04

25-May-09 14:04

Ryuk1990 wrote:
How would you set up a member variable for a button?

For check-boxes, right-click on the control and select 'Add variable' in the context menu. Make sure the 'Control variable' box is unchecked.

The procedure for radio buttons is slightly different - see the MSDN page[^].

It seems you now have to add DDX_whatever calls into your dialog's DoDataExchange method for value variables (which is a pain in the behind - I though Visual Studio did it for you), so here are some examples:

DDX_Check(pDX, IDC_CHECK1, c1); // Checkbox - c1 is an integer, which will be 0 (unchecked) or 1 (checked)
DDX_Radio(pDX, IDC_RADIO1, values); // Radio button - IDC_RADIO1 is the first cradio button in a radio button group.
                                    //                values is an integer, which will be 0 - (# buttons in group)-1
DDX_Text(pDX, IDC_EDIT1, edit); // Text box
DDX_Text(pDX, IDC_RICHEDIT21, rich); // Rich edit box

Now, for the calculate button - for buttons like that, you add an 'OnClicked' method. The easiest way to do that is to double-click on the button in the MFC dialog editor - Visual Studio will add the handler automatically.

In the handler, the first thing to do is to call UpdateData(TRUE), to get the values of controls into your member variables. Now you can calculate a string holding your summary information, assign to to the string variable associated with your edit box and finally call UpdateData(FALSE) to push the string value into the member variable values into the controls:

void CMyDialog::OnBnClickedCalculate()
{
   UpdateData(TRUE);
   m_summaryValue = m_firstName + " " + m_secondName + ", " + m_address + whatever else you want;
   UpdateData(FALSE);
}

Hope that helps!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Ryuk199025-May-09 14:29

Ryuk1990

25-May-09 14:29

I'll look into that, thanks.

By the way, do you know how to delete previous member variables that I created? I don't think I set up my MV's for check boxes correctly.

Stuart Dootson25-May-09 14:33

25-May-09 14:33

Ryuk1990 wrote:
By the way, do you know how to delete previous member variables that I created?

Remove their declarations and all references to them from the dialog's .cpp and .h files with the text editor. The 'Find All References' command (right-click on the variable in the text-editor) is useful for that (if you can't see that menu command, it's possible it's VS2008 only - I don't have VS2005 installed).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Bram van Kampen26-May-09 13:59

Bram van Kampen

26-May-09 13:59

Ryuk1990 wrote:
Can anyone help? Does anyone maybe know of any free tutorials on dialog-based stores?

what about 'Scribble'. It's free with the Compiler.

Smile | :)

Bram van Kampen

Macros.

bawratri25-May-09 12:15

bawratri

25-May-09 12:15

Any ideas how I could implement something like this:

void a_main() { ; }

#define b(fn) a##fn()

int main()
{
  b(__FUNCTION__);
  return 0;
}

Hope you get the idea, since I'm not good at explaining. Anyway, the point is to have the preprocessor to generate the function name for you, or something similar.

Thanks!

EDIT: Oh yeh, obliviously this doesn't work, because preprosessor isn't processing __FUNCTION__ to a umm.. usable text, instead the preprosessor will process it later to a string.

Re: Macros.

Stuart Dootson25-May-09 13:27

MFC Networking Application.

25-May-09 13:27

As you've found, you can't use __FUNCTION__, as it's inserted as a string, not a token. This is a shame, because you can convert a token to a string in the pre-processor, but not vice-versa.

So, you're only option would be this:

void a_main() { ; }

#define b(fn) a##fn()

int main()
{
  b(main);
  return 0;
}

i.e. putting the function name in explicitly Frown | :-(

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Macros.

bawratri25-May-09 22:38

bawratri

25-May-09 22:38

Yeps, that's how I'm doing it ATM. I just thought that I'd ask if anyone knew a trick I don't. Many thanks!

reddy0725-May-09 11:46

reddy07

25-May-09 11:46

Scenario: The application has 10 nodes connected in a network. each node can either act as server/client. At any given time there will be only one server and one client.
My question is say for example if default server is down - then client application will poll the message to remaining nodes looking for server if not it will become server for remaining clients.
So, how to poll message in a network using MFC.

Re: MFC Networking Application.

norish26-May-09 17:50

norish

26-May-09 17:50

You can use UDP broadcasting technique in that situation.
Server should implements workerthread which calls UDP recvfrom and client calls UDP sendto when its default server is down.

Notice; UDP broadcasting would not pass through the routers to different network, so machine nodes should be in the same network usually.

Re: MFC Networking Application.

fanronghua26-May-09 22:32

fanronghua

26-May-09 22:32

Very Well.

how to connect database

Supriyanka25-May-09 6:01

Supriyanka

25-May-09 6:01

How to connect database.database is in exelsheet.

David Crow25-May-09 8:33

David Crow

25-May-09 8:33

So which is it: reading from a database or an Excel file? You can use ODBC for both.
You can also use Excel Automation for the latter.

Are you using MFC?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Supriyanka25-May-09 19:52

Supriyanka

25-May-09 19:52

I am using MFC. hw to connect exelsheet as database while doing MFC project.

David Crow26-May-09 3:06

David Crow

26-May-09 3:06

Supriyanka wrote:
hw to connect exelsheet as database while doing MFC project.

Have you tried ODBC with CRecordset and CDatabase?

Hamid_RT25-May-09 19:22

Hamid_RT

25-May-09 19:22

For database you can use of CDatabase class for excel see CSpreadSheet - A Class to Read and Write to Excel[^].

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

fanronghua26-May-09 22:34

fanronghua

26-May-09 22:34

Which Database are you connect?
you can used AdoConnect
_ConnectionPtr * con;
_RecordsetPtr * rec;