Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;quot; [modified] - C / C++ / MFC Discussion Boards

Re: I want to call string from DLL and load it to static control

Waldermort1-Feb-07 2:06

1-Feb-07 2:06

This forum is here to help, not give you answers to homework assignments. Perhaps if you could show us what you have already tried we would be able to help you a little more.

Re: I want to call string from DLL and load it to static control

David Crow1-Feb-07 3:20

David Crow

1-Feb-07 3:20

M. Atul wrote:
i want to set this string to Static text of Dialog box. So how can done it.

With SetWindowText().

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

Re: I want to call string from DLL and load it to static control

Hamid_RT1-Feb-07 20:33

Hamid_RT

1-Feb-07 20:33

Do you want to set text you can use of SetWindowText or WM_SETTEXT

WhiteSky

error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'"

sheetal_0631-Jan-07 23:08

sheetal_06

31-Jan-07 23:08

I have a code as follows:

CSpanLoad *pBDLd;
CSpanLoad *pA3DLd;

---
---
--

pBDLd = pA3Ld;

//this assignment has to call the function:
void CSpanLoad::operator=( const CTRYObject &src ).

CTRYObject is inherited from CObject class.But now the assignment is not calling void CSpanLoad::operator=( const CTRYObject &src ) instead is calling the operator= of CObject.

If i give *pBDLd = *pA3Ld then it shows the compilation error as:

error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'"
see declaration of 'CObject::operator ='
see declaration of 'CObject'
This diagnostic occurred in the compiler generated function 'CPtrArray &CPtrArray::operator =(const CPtrArray &)'

Why the error? Confused | :confused:

**NOTE:

*pBDLd = *pA3Ld was working in VC6 properly without error.The error came in VS2005(.net).For correcting that only i changed into

pBDLd = pA3Ld;//which is not working as intended

Plz help..

Thanks and Regards

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&quot;

prasad_som1-Feb-07 0:38

prasad_som

1-Feb-07 0:38

sheetal_06 wrote:
If i give *pBDLd = *pA3Ld then it shows the compilation error as:

In this case assignment operator for CSpanLoad will be called.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'"

prasad_som1-Feb-07 0:51

prasad_som

1-Feb-07 0:51

sheetal_06 wrote:
error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'"
see declaration of 'CObject::operator ='
see declaration of 'CObject'
This diagnostic occurred in the compiler generated function 'CPtrArray &CPtrArray::operator =(const CPtrArray &)'

This error is due to,You are using CPtrArray object(which you have ot mentioned) in your app. in way its assignment operotor is is being called.
You need to show CPtrArray class object usage in your application.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&quot; [modified]

Mark Salsbery1-Feb-07 11:10

Mark Salsbery

1-Feb-07 11:10

This simply copies a pointer:

pBDLd = pA3Ld;

CObject hides the assignment operator to protect you from making a mistake.
Therefore, you need to define and implement an assignment operator for classes derived from
CObject:

class CSpanLoad : public CObject
{
   ...
 
public:
   CSpanLoad &operator=(const CSpanLoad &Src);
};
 
CSpanLoad &CSpanLoad::operator=(const CSpanLoad &Src)
{
   // copy Src object to this object
 
   return *this;
}

Then *pBDLd = *pA3Ld will work.

Mark

-- modified at 20:36 Thursday 1st February, 2007

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;quot; [modified]

sheetal_061-Feb-07 17:35

sheetal_06

1-Feb-07 17:35

//.h
class CCGMObject : public CObject
{
-----
};
class CSpanLoad : public CCGMObject
{
...
public:
void operator=( const CCGMObject& );
};

//.cpp
void CSpanLoad::operator=(const CCGMObject& Src)
{
// copy Src object to this object
}
Above code is not working..
Now when i made the code as follows according to ur suggestion it is working....Why?Could u plz explain..

class CCGMObject : public CObject
{
-----
};
class CSpanLoad : public CCGMObject
{
...
public:
void operator=( const CSpanLoad & );//changed
};

//.cpp
void CSpanLoad::operator=(const CSpanLoad & Src)//changed
{
// copy Src object to this object
}

CSpanLoad *pALd,*pBLd;
*pBLd = *pAld;

Thanks

-- modified at 0:27 Friday 2nd February, 2007

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;quot;

Mark Salsbery2-Feb-07 5:28

Mark Salsbery

2-Feb-07 5:28

What do you mean by not working? Didn't compile? Didn't link? Didn't run?

What error messages?

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;amp;quot;

sheetal_064-Feb-07 17:42

sheetal_06

4-Feb-07 17:42

It didn't compile..Shows error as:

error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'"
see declaration of 'CObject::operator ='
see declaration of 'CObject'
This diagnostic occurred in the compiler generated function 'CPtrArray &CPtrArray::operator =(const CPtrArray &)'

This error is coming only when i compile in VS2005.In VC6 it is not coming! Confused | :confused:

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;amp;quot;

Mark Salsbery5-Feb-07 5:09

Mark Salsbery

5-Feb-07 5:09

sheetal_06 wrote:
This diagnostic occurred in the compiler generated function 'CPtrArray &CPtrArray::operator =(const CPtrArray &)'

Where are you using a CPtrArray? I haven't seen that in your code so far.

Are you trying to assign one array to another with the = operator?

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;amp;quot;

sheetal_065-Feb-07 16:49

sheetal_06

5-Feb-07 16:49

CPtrArray is a compiler generated function..

I am trying to copy the contents of one pointer into another...

Re: error C2248: 'CObject::operator =' : cannot access private member declared in class 'CObject'&amp;amp;quot;

Mark Salsbery6-Feb-07 7:28

Mark Salsbery

6-Feb-07 7:28

Ok. In order for a CPtrArray to be copied, the objects in the array need to be copyable.
The assignment operator isn't virtual which is why your code didn't compile.
If copying CSpanLoad objects then the CSpanLoad class needs to have an assignment operator, even
if it is derived from a class which has an assignment operator defined.

Mark

System::String to char* convertion

Shahzeb Malik31-Jan-07 22:59

Shahzeb Malik

31-Jan-07 22:59

hi all,
i want to create a user friendly interface for other MS products the question is that VB.NET sends string value and C++ APIs require char*
project consist of VB application -> C# class library -> C++ class library(managed)
Now, when i create a function which accepts char* it raises error cannot convert string to char*
and when i change the function to System::String it is pain to convert it to char* can any one please tell me how to make it work

Thanks!

Shahzeb

Re: System::String to char* convertion

toxcct31-Jan-07 23:04

toxcct

31-Jan-07 23:04

this is a question for the C++/CLI forum[^]. please move your post consequently

[VisualCalc][Flags Beginner's Guide] | [Forums Guidelines][My Best Advice]

truncation of folder

Anilkumar K V31-Jan-07 22:40

Anilkumar K V

31-Jan-07 22:40

How to get complete path successfully as command line
I have added keys TestCommandLine.exe %L to HKEY_CLASSES_ROOT -> Folder so that on right click the folder path will be passed as command line and use cout<< arg[1] to display command line from TestCommandLine.exe. This path truncated whenever there is space in the path.

For example: If i right click and select the menu @ C:\System\New Folder
The program prints upto C:\System\New. Parts after space ignored

How to solve this?

Thanks
Anil

Re: truncation of folder

Christian Graus31-Jan-07 22:49

Christian Graus

31-Jan-07 22:49

The space is a delimiter. To get around this, you need to put the argument in quotes

TestCommandLine.exe "%L"

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Re: truncation of folder

Anilkumar K V31-Jan-07 23:36

Anilkumar K V

31-Jan-07 23:36

Thank you

Wireless comm. through Wi Fi

Member 378391131-Jan-07 22:29

Member 3783911

31-Jan-07 22:29

Can sm one tell me which on is better from the programmer's point of view, using SIP or H.323 or the combination of these, considerig feasibility aspect in wireless communication?

sumit

Re: Wireless comm. through Wi Fi

Christian Graus31-Jan-07 22:43

Christian Graus

31-Jan-07 22:43

Choose a forum, and ask there. Don't spam the site

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Re: Wireless comm. through Wi Fi

Waldermort1-Feb-07 2:11

Waldermort

1-Feb-07 2:11

Do you have a brain? Incase not, it is the thing inside your head that is supposed to assist you in determining what is pathetic and what is not. But since you are determined to have no name, I would point to the latter, IF you know know what that means.

Please stop spamming the site and give your account a real name!

Re: Wireless comm. through Wi Fi

Hamid_RT1-Feb-07 20:34

Hamid_RT

1-Feb-07 20:34

See H.323[^] if its helpfuls

WhiteSky

Child windows

NorGUI31-Jan-07 22:15

NorGUI

31-Jan-07 22:15

Hello,

I am working with MFC and I have a derived class CWnd that contain mutiple CCombox. I do not understand wath happend wenn I hide the CWnd I have looked into OnShowWindow from the combobox and it come never there but wenn I hide the CWnd the combobox are also hided.

I use the scroll fonctionality to move all Combobox wenn the is more as the CWnd height. Wenn the scroll position as changeg I Redraw all Combobox with MoveWindow(new position) and I Invalidate the rectangle from the CWnd. All combobox are redraw but the CWnd do not refresh or clean totaly the screen and some combobox are present in the screen but not any more existing.

Combobox create like:

this is the CWnd

Create(WS_CHILD|WS_VISIBLE|WS_VSCROLL|CBS_DROPDOWNLIST,CRect(0,0,200,30), this, i*100);

What happend with child window and what I try to fix my problem.

Thank you

AutreChien

Re: Child windows

Hamid_RT1-Feb-07 0:28

Hamid_RT

1-Feb-07 0:28

And your problem is ComboBox or CWnd you change location of Comboboxs wih MoveWindow and it seems that its correct,whats problem now

WhiteSky

Re: Child windows

NorGUI1-Feb-07 0:50

NorGUI

1-Feb-07 0:50

Hello,

I have found the problem but I do not understand. I have just hadded yesturday with the wizard from VS2005 a afx message from ON_WM_PAINT() to see if the OnPaint() was called.

Now I have remove this fonction and it's work!!!

I do not understand what I am doing wrong because I do not change anythink into this fonction:

void CWndStepEditor::OnPaint()
{

CPaintDC dc(this); // device context for painting

TRACE("CPaintDC dc(this); // device context for painting\n");

// TODO: Add your message handler code here
// Do not call CWnd::OnPaint() for painting messages

}

?? What happend when I add this fonction in a class !

AutreChien

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