Deriving from CObject and using = operator - C / C++ / MFC Discussion Boards

Krishnan V5-Apr-06 19:25

5-Apr-06 19:25

What I need is to set the modem properties for the dial-up connection I create programmatically. The GetCommState fn works if I have handle to the serial port. I just need to set-up the connection so that whenever the user dials the connection, the correct settings are used to connect with the modem.

FTP Server

Ahuja Ekta1-Apr-06 0:11

Ahuja Ekta

1-Apr-06 0:11

hi
can anyone tell me how can i include the default FTP Server program (EVC++ has a default FTP server program by the name of FTPD) in my project.
i am woking with windows Ce Sockets. and i have used evc++ for coding.
reply

Ekta Ahuja
ahuja.ekta@gmail.com

registry available to any user

RomTibi31-Mar-06 23:43

RomTibi

31-Mar-06 23:43

Are there registry available to any user?

I mean that, if on a station are several users with different rights(admins, users, etc.) is any registry key that anyone can change, without giving specific rights to it?

Re: registry available to any user

Stephen Hewitt1-Apr-06 0:42

Stephen Hewitt

1-Apr-06 0:42

Any key under HKEY_LOCAL_MACHINE.

Steve

Re: registry available to any user

RomTibi1-Apr-06 5:19

RomTibi

1-Apr-06 5:19

Thanks

Re: registry available to any user

Michael Dunn1-Apr-06 6:10

Michael Dunn

1-Apr-06 6:10

Normal users cannot write to HKLM.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: registry available to any user

Michael Dunn1-Apr-06 6:10

Michael Dunn

1-Apr-06 6:10

No, there is no key that all users can see and have write access to. HKLM is writable only by power users and admins. You'll need to use the All users\Application data directory to share data this way.

--Mike--
Visual C++ MVP Cool | :cool:

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Deriving from CObject and using = operator

Dr-Kuulun31-Mar-06 23:23

Dr-Kuulun

31-Mar-06 23:23

Hello,

how is the = operator to be implemented in a class derived from CObject?

I derived two classes with one element inside:

<br />
class CA : CObject<br />
{<br />
   int a;<br />
<br />
   void operator = (const CA& src) {};<br />
}<br />
<br />
class CB : CA<br />
{<br />
   int b;<br />
}<br />

The first class overwrites the = operator with an empty function.

The following code has a mystic result:

<br />
   CA obA;<br />
   CB obB;<br />
<br />
   obA.a=1;<br />
   obA.b=2;<br />
<br />
   obB=obA;<br />

The element b is copied, a not. Why? And what do the = operator in CObject? Why is b copied? Do I have to implement the operator in Class CB too?
Many questions no answer!

Thanx
Markus

Dr-Kuulun

Re: Deriving from CObject and using = operator

Vytas31-Mar-06 23:57

Vytas

31-Mar-06 23:57

class CA : CObject
{
int a;

CA & operator = (const CA &);
}

good luck

Vytas

Re: Deriving from CObject and using = operator

Michael Dunn1-Apr-06 6:13

Michael Dunn

1-Apr-06 6:13

How does that even compile? obA.b doesn't make sense.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Deriving from CObject and using = operator

Dr-Kuulun2-Apr-06 0:40

Dr-Kuulun

2-Apr-06 0:40

Yes it is wrong. Both objects should be instances from the last derrived class type CB.

Dr-Kuulun

Save into a UTF-8 file?

Abin31-Mar-06 23:04

Abin

31-Mar-06 23:04

I'm currently working on a project which needs to read contents from an ANSI text file and save into another text file in UTF-8 format, in fact it needs to convert about a thousand files from ANSI to UTF-8 and those old ANSI files must remain unmodified. Any suggestions? I'm not familiar with text encoding stuff...

Re: Save into a UTF-8 file?

Hamid_RT31-Mar-06 23:43

Hamid_RT

31-Mar-06 23:43

maybe it is some helpful to you

http://www.codeproject.com/file/CStdioFile_UTF8.asp[^]

http://www.codeproject.com/file/TextFileIO.asp[^]

Re: Save into a UTF-8 file?

Michael Dunn1-Apr-06 6:15

Michael Dunn

1-Apr-06 6:15

=[ Abin ]= wrote:
'm not familiar with text encoding stuff.

Read this article[^] before you start coding.

--Mike--
Visual C++ MVP Cool | :cool:

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set bk color of radio buttons

big_denny_20031-Mar-06 21:48

big_denny_200

31-Mar-06 21:48

hello

I have MFC dialog based application and have many checkboxes
and radio buttons in it, but the background color of the dialog is white, therefore i also want to set the bk color of radio buttons and checkboxes white, otherwise they look ugly Frown | :(

can you help ?

thank you.

Re: set bk color of radio buttons

Hamid_RT31-Mar-06 23:35

Hamid_RT

31-Mar-06 23:35

maybe it is some helpful to you

http://www.codeproject.com/buttonctrl/custombuttons.asp[^]

Re: set bk color of radio buttons

Hamid_RT31-Mar-06 23:39

Hamid_RT

31-Mar-06 23:39

and this
http://www.codeproject.com/buttonctrl/CCheckSK.asp[^]

How to Load & Read XML File in MFC

Amit Agarrwal31-Mar-06 20:57

Amit Agarrwal

31-Mar-06 20:57

hi all,
i have a problem is tht how can i load XML file in MFC VC++.
and how to read XML file.

becoz my Project using DOC/View Architecure for my project.

and another prob is that after reading the XML file.then some of information from XML must be print or show in child window.

plese guys i'm trying to solve this prob from last two or three days but not successed.help me.

it would be heaven to me if somebody could provide me exact code.

byeeeeee

Aavesh

Re: How to Load & Read XML File in MFC

_AnsHUMAN_ 31-Mar-06 22:10

_AnsHUMAN_

31-Mar-06 22:10

Use MSXML

For more information just check out the following link.
I hope this help you

http://www.codeproject.com/soap/ce_xml.asp

Vision is Always important and so is your ATTITUDE.

Wishes.

Anshuman Dandekar

Re: How to Load & Read XML File in MFC

Amit Agarrwal31-Mar-06 22:21

Amit Agarrwal

31-Mar-06 22:21

hi
thanx for ur reply.....

but i'm not getting that how can i integrate the code with my Application.
as i tried to search from google.it says that we can use LoadXML function to load the XML file.

when i treid it on vs.Net 2005 C++.i found a error "there is no system.xml namespace".

what should i do?

please help me......
byeee

Aavesh

Re: How to Load & Read XML File in MFC

_AnsHUMAN_ 31-Mar-06 22:30

_AnsHUMAN_

31-Mar-06 22:30

Have you installed SOAP SDK

Vision is Always important and so is your ATTITUDE.

Wishes.

Anshuman Dandekar

Re: How to Load & Read XML File in MFC

Hamid_RT31-Mar-06 23:26

Hamid_RT

31-Mar-06 23:26

maybe it is some helpful to you

http://www.codeguru.com/columns/Kate/article.php/c6579[^]

Re: How to Load & Read XML File in MFC

thatsme_cool31-Mar-06 23:30

thatsme_cool

31-Mar-06 23:30

// Use following method for opening the file
// pass filename as parameter

bool CMyClass::OpenXMLFile(const CComBSTR& bstrFileName)
{
VARIANT_BOOL bFlag;
_variant_t varFilePath;

CoInitialize(NULL);
if (m_pIDomDoc != NULL) //Declare it as member of ur class IXMLDOMDocument* m_pIDomDoc;
{
m_pIDomDoc = NULL;
}

if (m_pIDomDoc==NULL)
{
HRESULT hr = CoCreateInstance(CLSID_DOMDocument , NULL, CLSCTX_INPROC_SERVER , IID_IXMLDOMDocument ,
reinterpret_cast < void **> (&m_pIDomDoc));

if (SUCCEEDED(hr) && m_pIDomDoc!= NULL)
{
OLECHAR *oleFilePath = new OLECHAR[wcslen(bstrFileName) + 1];
wcscpy(oleFilePath, bstrFileName);
varFilePath = oleFilePath;

hr = m_pIDomDoc->load(varFilePath, &bFlag); //load the file in xmlDoc
if (SUCCEEDED(hr))
{
return true;
}
varFilePath.Clear();
delete []oleFilePath;
}
}
return false;
}

// call following method to read the elements of xml file

bool CMyClass::GetElement(const CComBSTR& bstrProperty, CComBSTR& bstrValue)
{
IXMLDOMElement *pIElement = NULL;
IXMLDOMNodeList *pINodeList = NULL;
IXMLDOMNodeList *pIChildNodeList = NULL;
IXMLDOMNode *pINode = NULL;
IXMLDOMNode *pIChildNode = NULL;
HRESULT hr;
CComBSTR bstrNodeName = NULL;
CComBSTR bstrNodeValue = NULL;
_variant_t varValue;
USES_CONVERSION;

hr = m_pIDomDoc->get_documentElement(&pIElement);

if (SUCCEEDED(hr) && pIElement!= NULL)
{
hr = pIElement->get_childNodes(&pINodeList);//get child nodes of document obj elem

if (SUCCEEDED(hr) && pINodeList!= NULL)
{
do {
pINodeList->nextNode(&pINode);//get next node in child node list

if (SUCCEEDED(hr) && pINode!= NULL)
{
hr = pINode->get_nodeName(&bstrNodeName);
if ((wcsicmp(bstrNodeName, bstrProperty)== 0))
{
hr = pINode->get_text(&bstrNodeValue);//get value of the property
bstrValue = bstrNodeValue;

if (bstrNodeName!= NULL)
::SysFreeString(bstrNodeName);

if (bstrNodeValue!= NULL)
::SysFreeString(bstrNodeValue);

pINode->Release();
pINodeList->Release();
pIElement->Release();
return true;
}

if (bstrNodeName!= NULL)
::SysFreeString(bstrNodeName);

pINode->Release();
}
}while(pINode!= NULL);
pINodeList->Release();
}
pIElement->Release();
}
return false;
}

call above method as
GetElement(_T("MyElement"), bstrValue);

USES_CONVERSION;
CString str = W2A(strValue);

store strvalue into the DS.
Please tell me if it helped you. Smile | :)

Re: How to Load & Read XML File in MFC

Amit Agarrwal31-Mar-06 23:54

Amit Agarrwal

31-Mar-06 23:54

hi thanx for ur code
i tried openXML function in m project but its giving following:
1..\MainFrm.cpp(163) : error C2146: syntax error : missing ';' before identifier 'varFilePath'
2..\MainFrm.cpp(163) : error C2065: 'varFilePath' : undeclared identifier
3..\MainFrm.cpp(166) : error C2065: 'm_pIDomDoc' : undeclared identifier
4..\MainFrm.cpp(182) : error C2227: left of '->load' must point to class/struct/union/generic type type is ''unknown-type''
5..\MainFrm.cpp(187) : error C2228: left of '.Clear' must have class/struct/union type is ''unknown-type''

please give me suggestion that how can i rectify these errors

thanx

Aavesh

Re: How to Load & Read XML File in MFC

thatsme_cool1-Apr-06 0:05

thatsme_cool

1-Apr-06 0:05

write following statement at the begining of ur code
#import "msxml.dll"

this should work otherwise
try including the header file for _variant_t class too.
i.e. comutil.h

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