C / C++ / MFC

Re: problem while adding record in MFC database application

13-Aug-04 5:34

You need something like:

void CAddbookView::OnAddClick() 
{
    CString strName,
            strAddr;
 
    // m_name and m_addr are CEdit member variables
    m_name.GetWindowText(strName);
    m_addr.GetWindowText(strAddr);
 
    m_pSet->AddNew();
    m_pSet->name = strName;
    m_pSet->addr = strAddr;
    m_pSet->Update();
}

Make sense?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

skgk17-Aug-04 3:55

skgk

17-Aug-04 3:55

Hello,
Thanks for your message. Sorry that i could'nt reply immediately. I tried
the same code in my application. Then i found that there is a problem.
I am using ODBC to connect to access database. So the member function like GetWindowText() is not available. I am not able to use the above code
u had sent.
I think for ODBC the coding part will be different. I am not able
to find the related member function available in that. So still i am having
the same problem.
Thanks in advance.

Re: problem while adding record in MFC database application

David Crow17-Aug-04 4:11

How to call and execute parameter query with ADO?

17-Aug-04 4:11

skgk wrote:
Then i found that there is a problem.

And that problem would be what, exactly?

skgk wrote:
I am using ODBC to connect to access database. So the member function like GetWindowText() is not available.

ODBC (which is a way of connecting with a database) and the GetWindowText() method (which gets the text/caption of a control) are mutually exclusive things. One is in no way related to the other.

skgk wrote:
I am not able to use the above code
u had sent.

Why?

skgk wrote:
I think for ODBC the coding part will be different.

Naturally, but since I know nothing of your project (other than it has a class named CAddbookView, a method named OnAddClick(), and a member variable named m_pSet), I obviously couldn't make it an exact fit. Yes, you might have to tweak it.

skgk wrote:
I am not able
to find the related member function available in that.

Which member function?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

george ivanov13-Aug-04 4:23

george ivanov

13-Aug-04 4:23

How to call and execute parameter query with ADO from access database?

were rgrtgrtvrtrt rtrtb brt tyuhjghj hbhbnh hnjm 1234567?

Static text disappears after losing focus

shultas13-Aug-04 4:12

shultas

13-Aug-04 4:12

Hey all.

I have a static text control on my dialog application. I set the text at startup with SetDlgItemText(IDC_STATIC,"Blah Blah"); It works great, however if I lose focus (ie, minimize the window, or even switch to another window and back) it disappears. Does anyone know of a way to get around this?

TIA

Ravi Bhavnani13-Aug-04 4:48

Ravi Bhavnani

13-Aug-04 4:48

Is the static text control covered by another? (You can check this in the resource editor).

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
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shultas13-Aug-04 5:04

shultas

13-Aug-04 5:04

Hi Ravi:

Nope, there's only one static control on the whole page, and it's off to the side not near anything else

David Crow13-Aug-04 5:37

13-Aug-04 5:37

You need to give the control an id other than IDC_STATIC, and assign it a member variable via ClassWizard. Then you can set its text using SetWindowText().

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Windows message handling with different threads.

Ravi Bhavnani13-Aug-04 10:48

Ravi Bhavnani

13-Aug-04 10:48

Gak! I missed that. Blush | :O

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Moak13-Aug-04 4:12

Moak

13-Aug-04 4:12

Hi,

this week I digged a bit deeper into understanding Windows message handling and some things are unclear for me. Let's assume a simple program where you have thread A running the message pump (GetMessage, Translate, Dispatch), and another threads B sending/posting events to this window's message queue. My questions are....

- SendMessage() will not put the message into the queue but directly processes the window's WndProc and block until message was processed. A context switch is triggered immediate to thread A?

- Postmessage() will put the message into the queue and return. When is the context switch happening, before or after PostMessage returns? If after, I wonder how windows wakes up the message queue to process the waiting messages and how big the (average/worst) delay is until the corresponding WndProc will be called.

- Is there a possible dead lock with Sendmessage() and two threads (A and B) both having an own message queue? Example, when you send a message to thread A's message queue and A's Wndproc sends back a message to B's message queue. Since B is waiting blocking for the first message to complete, thread A will then have to wait forever?

- When you use SetTimer() to create repeated timer events, are those WM_TIMER messages generated from the message queue and synchronous for all threads in the same process?

Thanks for information. I am very interested in background information how Windows makes message handling fast and comfortable.

Cheers, Moak

Re: Windows message handling with different threads.

David Crow13-Aug-04 7:11

Re: Windows message handling with different threads.

13-Aug-04 7:11

Moak wrote:
Is there a possible dead lock with Sendmessage() and two threads (A and B) both having an own message queue?

Possibly. It depends on which thread is sending to which queue.

Moak wrote:
Since B is waiting blocking for the first message to complete, thread A will then have to wait forever?

Yes, that's an example of deadlock.

You might want to read these two articles for a bit more on threads:

http://flounder.com/workerthreads.htm
http://flounder.com/uithreads.htm

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

MoakInternetcafe15-Aug-04 4:46

MoakInternetcafe

15-Aug-04 4:46

I would answer me Smile | :)

1) yes, immediate context switch with SendMessage
2) waits until event being signaled, scheduler switches when he feels so
3) dead lock possible with Sendmail, often discussed on INternet
4) no idea still

It seems nobody here knows how to do this!!!

CreepingFeature13-Aug-04 3:57

CreepingFeature

13-Aug-04 3:57

Sorry for the post name Blush | :O

!

A week ago I posted a topic on clearing the screen in dos! Got four replies, none of which worked!

Here is the problem. I have the folowing code inside main().

cout << " Hi! I am dumb.";<br />
   cout << endl;

// Here I need the screen to clear the way BASIC used to clear it when you put cls() or something like that, cant remember now.

// So that this next statment is printed on a clean dos screen!

cout << " Hi! I am dumb.";<br />
   cout << endl;

Some one suggested to cls() but didn't mention the header, then someone else said to use clrscr() and #include conio but conio does not have any members with such name.

Even the docs supplied with VS 7 Ent. do not have any refference to cls() or anything even closely resembling it!

If some one actualy does know how to do this PLEASE HELP!

If somebody was offended by this post I aplgs! But some times you should take the time to read your own posts to see if they make sence or compile proper!

Thanks in advance.

David Crow13-Aug-04 4:04

13-Aug-04 4:04

CreepingFeature wrote:
Got four replies, none of which worked!

Were any of them FillConsoleOutputAttribute() and FillConsoleOutputCharacter()?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Tom Dziedzic13-Aug-04 8:09

Tom Dziedzic

13-Aug-04 8:09

I think I replied to your question or was it someone else's?? dunno well you should use
system("cls");
it's fast, easy and painless.

David Crow13-Aug-04 10:10

13-Aug-04 10:10

namethatnooneelsetook2 wrote:
it's fast, easy and painless.

It's also antiquated, inefficient, and reminiscent of Unix days. The system() function starts a complete command interpreter, which then executes the <insert command="" here=""> command. I cringe when I see solutions that have employed the system() function. There is virtually nothing it can do that can't be done better by a direct API call. I consider it to have died with Win16 and is kept on for backward compatibility with old 16-bit programs that are being converted.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Rick York13-Aug-04 12:34

Rick York

13-Aug-04 12:34

Those are what is used in Q99261. Wink | ;)

__________________________________________
a two cent stamp short of going postal.

David Crow16-Aug-04 2:17

16-Aug-04 2:17

I see that. What's your point?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: VC6 Workspace settings

Archer28214-Aug-04 7:12

Archer282

14-Aug-04 7:12

Try this

void ClearScreen()
{

HANDLE hSTDOut = GetStdHandle(STD_OUTPUT_HANDLE);

COORD dwCoord;
DWORD nLength;
DWORD lpResult;
CONSOLE_SCREEN_BUFFER_INFO Info;

dwCoord.X = 0;
dwCoord.Y = 0;

// Get the console buffer info
GetConsoleScreenBufferInfo( hSTDOut, &Info );

nLength = Info.dwSize.X * Info.dwSize.Y;

// Fill the console with ' ' making it look like it has been cleared
FillConsoleOutputCharacter( hSTDOut, ' ', nLength, dwCoord, &lpResult );

// Set the console cursor position to 0,0
SetConsoleCursorPosition( hSTDOut, dwCoord );

}

VC6 Workspace settings

jerry0davis13-Aug-04 3:50

jerry0davis

13-Aug-04 3:50

Whilst using VC6 just now and somehow acceidentally press the certain key combination which means all tabs are now marked ">>" and all spaces ".". anyone know how I can turn this off please? Ta.

I feel like I'm diagonally parked in a parallel universe

Jerry Davis
http://www.astad.org
http://www.jvf.co.uk

David Crow13-Aug-04 4:00