C / C++ / MFC Discussion Boards

Re: How can I get the path of the executed program in this program?

Joao Vaz24-May-02 3:38

24-May-02 3:38

The GetCurrentDirectory function retrieves the current directory for the current process.

Cheers,
Joao Vaz
A person who is nice to you, but rude to the waiter, is not a nice person - Natalie Portman (Padme/Amidala of Star Wars)

Re: How can I get the path of the executed program in this program?

Eugene Pustovoyt24-May-02 3:56

Eugene Pustovoyt

24-May-02 3:56

I'm use the follow code:

CString CMyApp::GetHomeDirectory() const
{
	TCHAR sFilename[_MAX_PATH];
	TCHAR sDrive[_MAX_DRIVE];
	TCHAR sDir[_MAX_DIR];
	TCHAR sFname[_MAX_FNAME];
	TCHAR sExt[_MAX_EXT];
	
	GetModuleFileName(AfxGetInstanceHandle(), sFilename, _MAX_PATH);
	_tsplitpath(sFilename, sDrive, sDir, sFname, sExt);
	CString rVal(CString(sDrive) + CString(sDir));
	int nLen = rVal.GetLength();
	if (rVal.GetAt(nLen-1) != _T('\\'))
		rVal += _T("\\");
	return rVal;
}

Best regards,
Eugene Pustovoyt

Re: How can I get the path of the executed program in this program?

Nish Nishant24-May-02 4:35

Nish Nishant

24-May-02 4:35

Eugene Pustovoyt wrote:
CString CMyApp::GetHomeDirectory() const

What's that const there for ?

Confused | :confused:

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Re: How can I get the path of the executed program in this program?

C^hris L^osinger24-May-02 4:47

C^hris L^osinger

24-May-02 4:47

the function doesn't modify the object's internal state therefore, it can be marked "const". users of the class might like to know that.

-c

Cheap oil. It's worth it!

ISEffects - effects for images

Re: How can I get the path of the executed program in this program?

Nish Nishant24-May-02 15:01

Nish Nishant

24-May-02 15:01

Thanks Chris!

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Re: How can I get the path of the executed program in this program?

Joao Vaz24-May-02 5:30

Joao Vaz

24-May-02 5:30

Adding to what said Chris, all functions that doesn't change internal state, should marked const , since this could help the c++ compiler to optimize your code.

And of course, it reinforces the idea that the function doesn't affect the internal state of the component/object .
It's part of a filosofy of const correctness concerning the use of const Ref& to all your reference input arguments that wouldn't be modified by the function/method.

Cheers,
Joao Vaz
A person who is nice to you, but rude to the waiter, is not a nice person - Natalie Portman (Padme/Amidala of Star Wars)

Re: How can I get the path of the executed program in this program?

Nish Nishant24-May-02 15:14

Nish Nishant

24-May-02 15:14

Thanks Joao

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Re: How can I get the path of the executed program in this program?

Joao Vaz24-May-02 20:15

Joao Vaz

24-May-02 20:15

Your welcome Smile | :)

Cheers,
Joao Vaz
A person who is nice to you, but rude to the waiter, is not a nice person - Natalie Portman (Padme/Amidala of Star Wars)

Re: How can I get the path of the executed program in this program?

27-May-02 10:49

Thanks a lot! It helped.

And thank you everyone for the help. It is really pleasant when people help you.

Alexander

Re: How can I get the path of the executed program in this program?

Alexandru Savescu24-May-02 12:43

Alexandru Savescu

24-May-02 12:43

Try GetModuleFileName

Best regards,
Alexandru Savescu

Watch Window Formatting

Mark Donkers24-May-02 3:16

Mark Donkers

24-May-02 3:16

A friend of mine introduced me to this "trick" with the watch window. When watching an HRESULT, you can format the result to something that makes a little more sense.

Here's an example... If I have a variable HRESULT hr; and if I put hr,hr in the watch window it formats the value of hr into text.

So if the hr = 0 the watch window would read "S_OK".

Does anyone know of other cool watch window tricks like this?

TIA

Mark Donkers

A witty saying proves nothing.

-- Voltaire

Re: Watch Window Formatting

Martin Ziacek24-May-02 4:16

Martin Ziacek

24-May-02 4:16

You mean something like here:
http://msdn.microsoft.com/library/en-us/vcug98/html/_asug_symbols_for_watch_variables.asp?frame=true
don't you?
And except that, you can use for example ERR, to show last error, instead of calling GetLastError().

Martin

Re: Watch Window Formatting

Mark Donkers24-May-02 4:23

Mark Donkers

24-May-02 4:23

Martin,

This is perfect! Thanks a million Big Grin | :-D

Mark Donkers

A witty saying proves nothing.

-- Voltaire

Access violation in clistctrl

SnapRick24-May-02 2:51

SnapRick

24-May-02 2:51

I get the following error "First-chance exception in iss.exe (KERNEL32.DLL): 0xC0000005: Access Violation." with the code below at the statement mlist.GetColumn(i, &lvc);. Could anyone tell me why, I tried a lot of things but I cannot find a cause? Below is the code:

void CAdjustHeaderColumns::SaveColumnHeadingDefaultInfo(CString mCName, CListCtrlEx &mlist)
{
CRegKey reg;
CString g_registry;
g_registry.Format("%s%s", REG_ROOTDIR, COLDIR);
CNewHeaderCtrl* pHeader = (CNewHeaderCtrl*) mlist.GetDlgItem(0);
ASSERT(pHeader);
ASSERT(mlist);
int nMaxHLen = 100;
int mCount = mlist.GetColumnCount();
CString Caption;
CString mNum;
CString mWidth;
CString mCaption;
CString mPrevCaption;
mPrevCaption = "InitialStartUp";
LV_COLUMN lvc;

// Get the Column Info and fill the HDITEM structure
HDITEM HdItem;
HdItem.mask = HDI_TEXT;
HdItem.pszText = Caption.GetBuffer(nMaxHLen);
HdItem.cchTextMax = nMaxHLen;

// Save the default column information to the registry
for (int i = 0; i < mCount; i++)
{
mNum.Format("%d", i);
pHeader->GetItem(i, &HdItem);
mlist.GetColumn(i, &lvc); <--- error occurs here
mWidth.Format("%d", mlist.GetColumnWidth(i) );

m_dpos.Format("%sHDP%d", mCName, i);
m_dwdth.Format("%sHDW%d", mCName, i);
m_dtext.Format("%sHDT%d", mCName, i);

mCaption.Format("%s", Caption);
if (mCaption == mPrevCaption)
mCaption += "2";

if (reg.Open(HKEY_CURRENT_USER, g_registry) == ERROR_SUCCESS)
{
reg.Write(m_dpos, mNum);
reg.Write(m_dwdth, mWidth);
reg.Write(m_dtext, mCaption);
mPrevCaption = mCaption;
}
}
Caption.ReleaseBuffer();
}

Thank-you
Sincerely,
RAH

Re: Access violation in clistctrl

Joaquín M López Muñoz24-May-02 4:04

Joaquín M López Muñoz

24-May-02 4:04

Seems you're not setting lvc.mask to any sensible value.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Access violation in clistctrl

SnapRick24-May-02 4:27

SnapRick

24-May-02 4:27

That was the problem. Thank-you very much. I reviewed this code several times and it never occurred to me about the mask. I would never have found this without your help.

Thank-you
Sincerely,
RAH

Using external Members

laphijia24-May-02 2:43

laphijia

24-May-02 2:43

I have set up an application made of two CFormView based Forms.
I took as an example the Enroll Database Sample provided with Visual Studio.Net.
In the firs form the user can query the Database, the records are displayed in a ListControl.
After I want that when the user doubleclick a record in the list, or press a Button "Select", in the second form he can edit and update the record selected.

The second form consists of an edit control for each field in the database.

So when the user select a record in the first form, I query the database, I put with CEdit.SetWindowText() each field in the edit controls in the second form, and if the user make any change in the second form, I Update the database.

THE PROBLEM IS:
I have two different classes CFirsForm and CSecondForm.
In the OnBnSelectClick() in the First class how I call the member variables contained in the second class m_edit1, m_edit2, etc.

The code should look like:

CDataForm *pData;
pData = new CDataForm;
pData->m_editAddress.SetWindowText("st James Street");
delete pData;

But I get a Debug Assertion Failed, winocc.cpp Line:247.

What's wrong?

Sorry my incompetence. Confused | :confused:

"Nelle cose del mondo non e' il sapere ma il volere che puo'."

Re: Using external Members

Alexandru Savescu24-May-02 3:35

Alexandru Savescu

24-May-02 3:35

laphijia wrote:
CDataForm *pData;
pData = new CDataForm;
pData->m_editAddress.SetWindowText("st James Street");
delete pData;

Aren't you deleteing the form too soon?
And when exactly does the error occur?

Best regards,
Alexandru Savescu

Re: Using external Members

laphijia24-May-02 3:59

laphijia

24-May-02 3:59

void CFirstForm::OnBnClickedBtnSelect()
{
// TODO: Add your control notification handler code here

CDataForm *pData;
pData = new CDataForm;
pData->GetLocalData(50);
delete pData;

}

Even if I don't delete the pointer it's just the same.
The error happens when I click the SelectButton in the FirstForm.
When I click the Select Button, it should modify the text in the edit controls in the SecondForm.

How can I achieve this?

I tried also to add a function that in the CSecondForm class, that modifies the controls, and call it, passing the parameters in the void CFirstForm::OnBnClickedBtnSelect(), but I receive the error non-static function callin a static function or viceversa.
Confused | :confused:

"Nelle cose del mondo non e' il sapere ma il volere che puo'."

Re: Using external Members

Joaquín M López Muñoz24-May-02 3:58

Joaquín M López Muñoz

24-May-02 3:58

pData = new CDataForm;
pData->m_editAddress.SetWindowText("st James Street");

Altough pData is constructed when you call m_editAddress.SetWindowText on it, its underlying window does not yet exist. Try calling pData->Create(...) first.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Using external Members

laphijia24-May-02 6:39

laphijia

24-May-02 6:39

Joaquín M López Muñoz wrote:
Altough pData is constructed when you call m_editAddress.SetWindowText on it, its underlying window does not yet exist. Try calling pData->Create(...) first.

What does this means?

How I call the Create() function, there is a tutorial or can you help me?

"Nelle cose del mondo non e' il sapere ma il volere che puo'."

Holding pointers to functions as values in a std::map

Alexandru Savescu24-May-02 2:43

Alexandru Savescu

24-May-02 2:43

Hello,

I have defined a pointer to a function that returns int and receives 3 doubles like this:
<pre>
typedef int ( *fptr)(double tp, double etc, double atd);
</pre>

And I have declared one function of the type above named f1.

I want to hold a map of CString and pointers to functions so I declared like this:

map <CString, fptr> MyMap;

MyMap.insert (pair <CString, fptr> ("aaa", f1); // error here
and the error is
pair<class CString,int (__cdecl*)(double,double,double)>::pair<class CString,int (__cdecl*)(double,double,double)>' : none of the 2 overloads can convert parameter 2 from type 'int (doub
le,double,double)'

Best regards,
Alexandru Savescu

Re: Holding pointers to functions as values in a std::map

C^hris L^osinger24-May-02 3:03

C^hris L^osinger

24-May-02 3:03

try : MyMap.insert (pair ("aaa", &f1));

-c

Cheap oil. It's worth it!

ISEffects - effects for images

Re: Holding pointers to functions as values in a std::map

Alexandru Savescu24-May-02 3:13

Alexandru Savescu

24-May-02 3:13

Thanks it worked.

It was obvious! Wink | ;)

Best regards,
Alexandru Savescu

I'm doing similar but why won't work

24-May-02 3:45

Hi,

I'm doing something similar, but i don't have luck Frown | :(

<br />
typedef bool (*func)(CClient *, CPacketBase *);<br />
typedef std::map<long, func> CHandlerMap;<br />

and I declared a function called

<br />
bool CPacketHandler::prcLogin(CClient *pclt, CPacketBase *pak)<br />
{<br />
 ....<br />
  return true;<br />
}<br />

I tried to insert the function into the map like:

<br />
m_HandlerMap.insert(CHandlerMap::value_type(1001, &prcLogin));<br />

The error I got is :

error C2276: '&' : illegal operation on bound member function expression
Error executing cl.exe.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.