C / C++ / MFC

Re: Database connection in vc++

24-Jul-06 1:19

See here[^]

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

David Crow24-Jul-06 2:59

David Crow

24-Jul-06 2:59

See the semi-related article here.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

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

Displaying the content of control to new form contron

ningthemcha24-Jul-06 1:02

ningthemcha

24-Jul-06 1:02

hello

i want to display the content of edit control in one form to another edit box content in new from

janan

Re: Displaying the content of control to new form contron

_AnsHUMAN_ 24-Jul-06 2:33

Re: Displaying the content of control to new form contron

24-Jul-06 2:33

Say if you have an edit box in the first dialog then in the second dialog you can place a pointer to the parent class like
CMain* pParent=(CMain*)GetParent();
pParent->m_edit.GetWindowText() etc..//... to get the value from the other edit box
// Put it into the edit box in the second dialog using
m_editOnSecondDlg.SetWindowText()...

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Hamid_RT24-Jul-06 2:41

Hamid_RT

24-Jul-06 2:41

Whats application type?
if its dialog you can use

<br />
//include header file<br />
CMain* m_Main=(CMain*)GetParent();<br />
CString str;<br />
m_Main->m_Edit1.GetWindowText(str);<br />

in another dialog use

<br />
m_Edit2.SetWindowText(str);

whitesky

Re: Displaying the content of control to new form contron

David Crow24-Jul-06 3:03

David Crow

24-Jul-06 3:03

What is the relationship between the two dialogs (i.e., parent/child, siblings)?

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

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

asynchronized I/O == multiplexing I/O?

George_George24-Jul-06 0:57

George_George

24-Jul-06 0:57

Hello everyone,

I always see the two words -- asynchronized I/O and I/O multiplexing. Are they the same thing -- like select/poll?

I noticed that in some situations, people say they are different and asynchronized I/O is better than I/O multiplexing.

Could anyone help to clarify the differences between the two words?

thanks in advance,
George

Re: asynchronized I/O == multiplexing I/O?

peterchen24-Jul-06 2:12

peterchen

24-Jul-06 2:12

Multiplexed I/O queries multiple I/O channels, and returns if an communication occurs on one channel. The typical use is a Server process that has to respond to multiple connections. The call is blocking, so you can't do anything else (in this thread).

Asynchronous I/O is more versatile, but can be used in the same scenario.
You can request the I/O operation to start, then do your own things. At any time, you can query if the I/O operation has completed It's also possible to set an event or call a callback function when the operation completes.

Some of us walk the memory lane, others plummet into a rabbit hole

Tree<t> in C# || Fold With Us! || sighist

Re: asynchronized I/O == multiplexing I/O? [modified]

George_George25-Jul-06 2:06

George_George

25-Jul-06 2:06

Thank you very much peterchen!

Your reply makes senses.

peterchen wrote:
Multiplexed I/O queries multiple I/O channels, and returns if an communication occurs on one channel. The typical use is a Server process that has to respond to multiple connections. The call is blocking, so you can't do anything else (in this thread).

I can not imagine why in the situation (server process handles multiple client connections) the call is blocking (other than asynchronous) -- I think the server can process other things even if no new data is received from client connection, which is an asynchronized mechanism other than a blocked mechanism. Could you show me more details please?

regards,
George

-- modified at 8:06 Tuesday 25th July, 2006

Set Focus to Button?

bosfan24-Jul-06 0:37

bosfan

24-Jul-06 0:37

Hello comunity,
how to set an focus to button and select him when user enter a CEdit field, so when the user press enter on keyboard the additional funktion begins, example show an MessageBox with this text from
this CEdit field, and not like now to close my dialog???

Thanx in advance!
break;

toxcct24-Jul-06 0:41

toxcct

24-Jul-06 0:41

setting the focus is one thing, and select him so that when user presses enter key in an edit box is an onther one.

to set focus :

(GetDlgItem(IDC_MY_BUTTON))->SetFocus();

to set as the default button :

this->SetDefID(IDC_MY_BUTTON);

where IDC_MY_BUTTON is the button you want to act on, and this, is the dialog box which the button is layed on...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

bosfan24-Jul-06 1:09

bosfan

24-Jul-06 1:09

Hi,
thanx a lot Smile | :)

you solve my problem! Wink | ;)

That what im looking for is

this->SetDefID(IDC_MY_BUTTON);

regards
break;

_AnsHUMAN_ 24-Jul-06 0:42

24-Jul-06 0:42

break; wrote

CEdit field, so when the user press enter on

Didn't get your question clearly. But I feel that you want to capture the enter key on the dialog so that when enter key is pressed you don't close the dialog.
Right?
If yes you can use PreTranslateMessage() and detect when Enter is pressed
Something like

if(pMsg->message == WM_KEYDOWN && (VK_ESCAPE == pMsg->wParam || VK_RETURN == pMsg->wParam))
		//if(AfxMessageBox("Do you want to exit",MB_YESNO)==IDNO)
			pMsg->wParam=VK_SEPARATOR;

would do

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Reading text from where mouse is double clicked!!!

bosfan24-Jul-06 1:26

bosfan

24-Jul-06 1:26

Hello,
thanx for answer, i solve the problem like this:

SetDefID(IDC_ADD);

regards
break;

_AnsHUMAN_ 24-Jul-06 0:20

Re: Reading text from where mouse is double clicked!!!

24-Jul-06 0:20

Hi all,
How do I detect that the mouse was double clicked on a text in any window. eg.(edit box, static text box,hyperlink,MS-Outlook etc).I need the text to be read and stored in the database(only single word on which the mouse is clicked).

Some link to articles that could help me build on this.

My initial ideas are that I can develop a system wide hook for mouse and check for its double click event.When ever it does a double click I would read the text(and I don't know this right now how this would be achieved-Reading the text).
Thanks in advancee

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Programm3r24-Jul-06 0:31

Programm3r

24-Jul-06 0:31

Hi,

Dont know if this will help you.....

http://microsoft.ease.lsoft.com/scripts/wa-msn.exe?A2=ind9904b&L=mfc&D=0&T=0&P=6107[^]

Regards

Programm3r

Re: Reading text from where mouse is double clicked!!!

David Crow24-Jul-06 3:08

David Crow

24-Jul-06 3:08

See if this helps.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

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

read/ write to screen/ file

tanarnelinistit24-Jul-06 0:05

tanarnelinistit

24-Jul-06 0:05

I'm trying to make it clear this time. I have a function called Read that reads from the COM. Then i'm using it in the following piece of code to print the result to the screen and to write it in one file. The output to the screen it's ok (FFFF00000000028C) but the one to the file is : "ൃFFF " or smth like that. Note: all the output from my device that is connected to COM is preceded by a Line feed <lf-0x0a> and terminated by a Carriage return <cr-0x0d>
I use the following code:

DWORD dwBytesRead = 0;<br />
      char szBuffer[101];<br />
      FILE *out;<br />
serial.Read(szBuffer,sizeof(szBuffer)-1,&dwBytesRead);<br />
if (dwBytesRead > 0)<br />
				{<br />
										szBuffer[dwBytesRead] = '\0';<br />
					out = fopen( "output.txt", "w" );<br />
					fprintf( out, "%s", szBuffer );              <br />
					printf("%s", szBuffer);<br />
					fclose(out);<br />
<br />
					// Check if EOF (CTRL+'[') has been specified<br />
					if (strchr(szBuffer,EOF_Char))<br />
						fContinue = false;<br />
				<br />
				}

Cedric Moonen24-Jul-06 0:14

Cedric Moonen

24-Jul-06 0:14

If that code is inside a loop (I suppose that, because of the fContinue), then you will close and open the file each time (and of course erasing all its content). It is better top open the file it before and close it after the loop.

Cédric Moonen
Software developer

Charting control

tanarnelinistit24-Jul-06 0:18

tanarnelinistit

24-Jul-06 0:18

I've also tried that version, and I agree with you, but it still doesn't work.

normanS24-Jul-06 0:58

normanS

24-Jul-06 0:58

I can't see a problem with your code.

As Cedric said, your code will overwrite anything that is already in the file. You can work round this by opening the file then moving to the end before writing, something like this:

DWORD dwBytesRead = 0, dwBytesWritten;
char szBuffer[101];
static HANDLE hFileHandle = INVALID_HANDLE_VALUE;

serial.Read(szBuffer,sizeof(szBuffer)-1,&dwBytesRead);
if (dwBytesRead > 0)
{
szBuffer[dwBytesRead] = '\0';
hFileHandle = CreateFile(szLogFileName, GENERIC_WRITE | GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_WRITE_THROUGH, NULL);
SetFilePointer( hFileHandle, 0, NULL, FILE_END);
WriteFile(hFileHandle, (LPCVOID) szBuffer, dwBytesRead+1, &dwBytesWritten, NULL);
printf("%s", szBuffer);
fclose(out);

// Check if EOF (CTRL+'[') has been specified
if (strchr(szBuffer,EOF_Char))
fContinue = false;

}

tanarnelinistit24-Jul-06 1:16

tanarnelinistit

24-Jul-06 1:16

yes, it finally works. Thank you. But what if i want all of the data that i receive do be written on the same line? How can i strip the string that i receive of it's newline and carriage return?