C / C++ / MFC Discussion Boards

David Crow18-Jan-05 4:13

18-Jan-05 4:13

While the task is easy enough to do, I certainly would not have chosen it for my first MFC project.

I presume you have created an SDI application (using AppWizard). If so, I would derive the view from CEditView. In the handler funtion for the button, call GetEditCtrl() to get a reference to the edit control used by the view. You can then call CEdit::GetWindowText() to get the text currently displayed in the edit control. Use the function _strrev() to reverse the text. Call CEdit::SetWindowText() to write the new text. Call GetDocument()->SetModifiedFlag(TRUE) to let the document know that the text has been changed. Upon exiting, the framework should prompt you to save the changed file.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: MFC manipulating data

hugPW18-Jan-05 5:19

hugPW

18-Jan-05 5:19

Thank you I'll give it a go and let you know how I get on.

You are right If I knew it was going to be this difficult I wouldn't have chosen this either but I've started so I'll finish as they say Smile | :)

Re: MFC manipulating data

hugPW18-Jan-05 6:05

hugPW

18-Jan-05 6:05

Nearly there!!
I have entered the code you suggest and it now looks like this
/////////////////////////////////////////////////////////////////////////////
// CReverseView message handlers

void CReverseView::OnReverse()
{

// TODO: Add your command handler code here
GetEditCtrl() ;

CEdit::GetWindowText() ;

//_strrev();

//CEdit::SetWindowText();

//GetDocument()->SetModifiedFlag(TRUE) ;

}
and I get this error message
error C2661: 'GetWindowTextA' : no overloaded function takes 0 parameters.

and subsequently for all the other items when not commented out. I presume something needs to go into the bracket?

do I declare a variable here or what happens? I want to get it correct.

Now you can see how new I am to this but I have learnt more today than in weeks of trying on my own. NB the SDI project was called reverse hence the reference
Regards Smile | :)

Thank you again for your time and help

Re: MFC manipulating data

David Crow18-Jan-05 6:12

David Crow

18-Jan-05 6:12

hugPW wrote:
GetEditCtrl() ;

This should be:

CEdit &edit = GetEditCtrl();

hugPW wrote:
CEdit::GetWindowText() ;

This should be:

CString strText;
edit.GetWindowText(strText);

There are other changes to make, but see how you can fare with these first.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: MFC manipulating data

hugPW18-Jan-05 6:32

hugPW

18-Jan-05 6:32

Now we are really getting somewhere!
code looks like this

void CReverseView::OnReverse()
{

// TODO: Add your command handler code here
CEdit &edit = GetEditCtrl();

CString strText;

edit.GetWindowText(strText);

_strrev(strText);

edit.SetWindowText(strText);

GetDocument()->SetModifiedFlag(TRUE) ;

}

doesn't like _strrev, get this error. After that it should work!

error C2664: '_strrev' : cannot convert parameter 1 from 'class CString' to 'char *'

I was going to write my own bit of code but if the function exists I might as well use it.

Thank you I really appreciate this help.

Re: MFC manipulating data

David Crow18-Jan-05 7:04

David Crow

18-Jan-05 7:04

hugPW wrote:
error C2664: '_strrev' : cannot convert parameter 1 from 'class CString' to 'char *'

The answer is in the error message. You need to figure out how to "convert" a CString object to a char * that _strrev() expects. Become very familiar with the CString class.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: MFC manipulating data

hugPW18-Jan-05 7:39

hugPW

18-Jan-05 7:39

Thank you once again for all your help!
Kind Regards

Peter

Disable/Enable OK button in a property sheet

Rajesh_K_Sharma18-Jan-05 1:01

Rajesh_K_Sharma

18-Jan-05 1:01

Hi,
I have a Property Sheet Class with three pages.

My question is, how can I disable/enable the OK button based on the user input on

any of the pages?

I have a Property Sheet Class with three pages.

BOOL CPropSht::OnInitDialog()
{
BOOL bResult = CPropertySheet::OnInitDialog();

CWnd *wnd=(CWnd*)GetDlgItem(IDOK);
wnd->EnableWindow(FALSE);

return bResult;
}

I have seen that OK button is disable.

I have added three pages page1,Page2 and Page3 in a property Sheet.

Now, suppose user changes something on any of the pages then in this situation OK

button should be enable.
I mean, OK button should behave like apply button.

Please provide me some idea.
Thanks!

rajesh

Re: Disable/Enable OK button in a property sheet

Selvam R18-Jan-05 2:15

Selvam R

18-Jan-05 2:15

Hi,

http://www.codeguru.com/Cpp/controls/propertysheet/article.php/c3973/[^]

Regards,
Selvam

using CDHtmlDialog for 2 html files

lirik17-Jan-05 23:52

lirik

17-Jan-05 23:52

Hi,

I am trying to use cdhtmldialog to display a html page in the resource folder, it works fine untill I want to have more than one html file.

Do anyone know how to change to the other html file while having the original one displayed? Confused | :confused:

Thanks a lot!!!

I have a Serious Problem

pubududilena17-Jan-05 22:57

pubududilena

17-Jan-05 22:57

hi all,
I am using SQLConfigDataSource(HWND hwndParent,UINT fRequest, LPCSTR lpszDriver, LPCSTR lpszAttributes) Method to configure the ODBC datasource..

The Problem is I have used the above Method Like this:-
SQLConfigDataSource(NULL,ODBC_ADD_DSN, "SQL Server\0","DSN=myfinger\0" "Server=SERVER\0" "Database=emp\0");
This working perfectly and create the DSN..
Now I want to give the DSN ,server ,Database Name as variables..

But when I create create Like this This is not working..
CString var4,v1,v2,v3;
v1="myfinger";
v2="SERVER";
v3="emp";

var4.Format(" \"DSN=%s\0\" \"Server=%s\0\" \"Database=%s\0\" ",v1,v2,v3);

SQLConfigDataSource(NULL,ODBC_ADD_DSN, "SQL Server\0",var4);
But No error When compilling the Program..But Not creating the DSN..

So please any know the correct way to show this please send me a reply...
Thanks in advance..

Re: I have a Serious Problem

David Crow18-Jan-05 4:17

David Crow

18-Jan-05 4:17

There is no need to put the extra \0 characters in the string. CString::Format() does not like them. Looking at var4 after calling Format() would have confirmed this.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: I have a Serious Problem

Blake Miller18-Jan-05 4:41

Blake Miller

18-Jan-05 4:41

Also, when you have a variable number of arguments, which follow a formatting type string, the compiler does not necessaily know what to types to cast the arguments into, so you should probably always cast the CString manually in such a situation. I always do and boy have the wierdness factors decreased.

So, it would like something like this, following mine and David's suggestions:

var4.Format(" \"DSN=%s\" \"Server=%s\" \"Database=%s\" ",(LPCTSTR)v1, (LPCTSTR)v2, (LPCTSTR)v3);

Re: I have a Serious Problem

pubududilena18-Jan-05 15:14

pubududilena

18-Jan-05 15:14

hi ,
Sorry that is also not working..
Compilling the Project perfectly..But Not creating the DSN..
If I used the Method like this:
SQLConfigDataSource(NULL,ODBC_ADD_DSN, "SQL Server\0","DSN=myfinger\0" "Server=SERVER\0" "Database=emp\0");
This working perfectly and create the DSN..
This is working ...
But I want to pass the values for DSN,Server and Database/b>

please help...

Re: I have a Serious Problem

Blake Miller19-Jan-05 4:13

Blake Miller

19-Jan-05 4:13

SQLConfigDataSource -> lpszAttributes
List of attributes in the form "keyname=value". These strings are separated by null terminators with two consecutive null terminators at the end of the list.

Try this instead:

CString var4, v1, v2, v3;<br />
<br />
v1 = "myfinger";<br />
v2 = "SERVER";<br />
v3 = "emp";<br />
<br />
// this generates paramaters separated by a single NUL character <br />
// and a sting terminated with two NUL characters<br />
var4.Format("DSN=%s\0Server=%s\0Database=%s\0", (LPCTSTR)v1, (LPCTSTR)v2, (LPCTSTR)v3);<br />
<br />
SQLConfigDataSource(NULL, ODBC_ADD_DSN, "SQL Server", (LPCTSTR)var4);

I think this will work for you.

Re: I have a Serious Problem

pubududilena19-Jan-05 21:06

pubududilena

19-Jan-05 21:06

hi,
Thanks for ur reply..But it is also not working..You can also try to create DSN using above ur code:

void testDlg::OnButton2()
{
CString var4, v1, v2, v3;

v1 = "myfinger";
v2 = "SERVER";
v3 = "emp";

// this generates paramaters separated by a single NUL character
// and a sting terminated with two NUL characters
var4.Format("DSN=%s\0Server=%s\0Database=%s\0", (LPCTSTR)v1, (LPCTSTR)v2, (LPCTSTR)v3);

if(!SQLConfigDataSource(NULL, ODBC_ADD_DSN, "SQL Server\0", (LPCTSTR)var4))
AfxMessageBox("error");

}
But I got Error for this..

Thanks in advance..

Another question to threads

doneirik17-Jan-05 22:49

doneirik

17-Jan-05 22:49

I have created a separate thread to continuously monitor the serial port (i.e. to wait for something to arrive and then read it out)

Is it possible to write to the serial port at the same time (in the main thread), or does the read thread block. I have tried...it didn´t work, but the problem might be somewhere else...
If I cannot send while monitoring the port, what would be the proper solution? Do I have to temporarily Suspend, Sleep or Abort the thread while performing the write operation?

doneirik

Re: Another question to threads

Antony M Kancidrowski18-Jan-05 2:34

Antony M Kancidrowski

18-Jan-05 2:34

IIRC you should use overlapped IO for the serial read write.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: Another question to threads

includeh1018-Jan-05 4:02

includeh10

18-Jan-05 4:02

it is not neccessary to write in a thread - thread is for waiting (reading) events.

before u write, u need to check if writing (sending) buffer is empty - otherwise writing fails.

i have worked for years on your current job.

includeh10

How change the backgound Color of Dialog Form

phijophlip17-Jan-05 21:58

phijophlip

17-Jan-05 21:58

How can I change the background color of dialog form in a MFC application.

can anyone help me regarding this project ?

Philip

Re: How change the backgound Color of Dialog Form

Aamir Butt17-Jan-05 23:08

Aamir Butt

17-Jan-05 23:08

Write an event handler for WM_CTLCOLOR and change the color there.

Found on Bash.org

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In Conjunction With Mr Bhatt

ThatsAlok18-Jan-05 0:41

ThatsAlok

18-Jan-05 0:41

Here is Small Code that Will Help

HBRUSH CExeCreatorDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
	HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
	

	//Check if it Edit Control Return Default Color
	if(nCtlColor ==CTLCOLOR_EDIT)
	{
		return hbr;
	}

	//Return Color for BAck Ground
	::SetTextColor(pDC->GetSafeHdc(),DLGTEXTCOLOR);
	::SetBkColor(pDC->GetSafeHdc(),PUNTO_BGCOLOR);
	hbr=CreateSolidBrush(PUNTO_BGCOLOR);
	return hbr;
}

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: In Conjunction With Mr Bhatt

Aamir Butt18-Jan-05 1:07

Aamir Butt

18-Jan-05 1:07

Hi Alok, I am Butt not Bhatt Smile | :)

. There is a very small difference in spelling but a lot of difference otherwise.

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Re: In Conjunction With Mr Bhatt

ThatsAlok18-Jan-05 6:45

ThatsAlok

18-Jan-05 6:45

Bro!
Please Don't Mind, there is Nothing Intentional.

Aamir Butt wrote:
there is a very small difference in spelling but a lot of difference otherwise.

Yeah I know the meaning of these two Surnames, I am sorry by heart, If it hurt you.

"I Think this Will Help"
<h5
alok="" gupta="" <br=""> visit me at http://www.thisisalok.tk

Re: In Conjunction With Mr Bhatt

Aamir Butt18-Jan-05 19:19

Aamir Butt

18-Jan-05 19:19

Its OK, no hard feelings Smile | :)

Found on Bash.org

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