C / C++ / MFC Discussion Boards

Re: Compiling Visual C++ .NET projects from command line

Stuart Dootson15-Aug-02 11:05

15-Aug-02 11:05

<disclaimer>I've not tried this with VS.NET, just VS6 where it worked a treat</disclaimer>

1. In a command prompt window, execute the vcvars.bat file in the Visual Studio .NET folder\VC7\bin folder. (i.e. Set up environment variables etc)

2. Try the command devenv /build .vcproj filename. If you do devenv /?, it shows you the command line parameters.

Stuart Dootson

'Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p'

Logon script and dial up

Alberto Giannetto15-Aug-02 3:45

Alberto Giannetto

15-Aug-02 3:45

Hi all,

Does anyone know if it is possible, when dialling up the internet with a modem, to run local applications using the login script (the one typically used to provide information to the ISP) so that, when the system dials, an application runs - instaed of having a system that polls the port to see if there's a connection.

Thanks,

Alberto Giannetto

staement executes once then next time around -exception

ns15-Aug-02 3:33

15-Aug-02 3:33

I am repeatedly accessing this function in my database app:

void CTrain1View::GetPhotoDB(CString m_PhotoDBName,CString m_MineName)
{

	if (m_photoDb.IsOpen()) m_photoDb.Close();

	m_photoDb.OpenPhotoDb(m_PhotoDBName, m_MineName);


}

where

int DbClass::OpenPhotoDb(CString PhotoDBName, CString MineName)
{
	try	
		{
	
		
		if (FAILED (m_pConnPhoto->Open (_bstr_t ("Provider=Microsoft.Jet.OLEDB.4.0;Data     Source = "+ PhotoDBName ),_bstr_t (""), _bstr_t (""), adModeUnknown)))
			{
			AfxMessageBox ("Can't open datasource");
			return -1;
			}

		CString partQuery = "'"+MineName+"'";



		CString SQLQ = "SELECT * FROM tblMine WHERE (DefID = "+partQuery+")";

		char*  SQLQuery = new char [SQLQ.GetLength()+1];

		strcpy(SQLQuery, SQLQ);


		m_pCommandPhoto->ActiveConnection = m_pConnPhoto;
		m_pCommandPhoto->CommandText= SQLQuery;  

	
		m_pRecordsetPhoto->CursorLocation = adUseClient;
		m_pRecordsetPhoto->Open ((IDispatch *) m_pCommandPhoto, vtMissing, adOpenKeyset,
							adLockOptimistic, -1);

		delete[] SQLQuery;
		return num;
		}
	catch(_com_error)

	{

	// Pass a connection pointer.

	   PrintProviderError(m_pConn);

	}


}

The second time I call the first function, and it calls OpenPhotoDB, there is a com error at:

if (FAILED (m_pConnPhoto->Open (_bstr_t ("Provider=Microsoft.Jet.OLEDB.4.0;Data     Source = "+ PhotoDBName ),_bstr_t (""), _bstr_t (""), adModeUnknown)))
    {
    AfxMessageBox ("Can't open datasource");
    return -1;
    }

even though as you can see, I did close the db before trying to open it again. Any one know ADO to help me out. I'm opening and then closing it before trying to open it again, so why does it choke?

Thanks,
ns

Re: staement executes once then next time around -exception

Ranjan Banerji15-Aug-02 3:37

Ranjan Banerji

15-Aug-02 3:37

First of all why are you closing the database connection prior to each query? This is a very inefficient way for your code to work. It should be more like if db.closed thhen db.open(). You should use the open database connection to execute as many queries you want.

This will not solve your current problem but will make your code more efficient, unless I missed something while reading your message. Smile | :)

Re: staement executes once then next time around -exception

ns15-Aug-02 3:46

15-Aug-02 3:46

Okay - so I should open the database just once and perform as many queries as Ilike on it. Right?

The reason I want to close and reopen is that most of the time its the same db, but sometimes the a different db name to open might come in as a parameter.

What about the recordset object. Since I do rs.Open for each query, should I close it each time and reopen it I pass it a new SQL string?

Thanks
ns

Re: staement executes ...error checking doesnt report anything:

ns15-Aug-02 3:41

15-Aug-02 3:41

None of the messsageboxes fire, the program execution merrily skips past the called function and goes on!

THe error checking in place is:

void PrintProviderError(_ConnectionPtr pConnection)

{

//Define Other Variables

HRESULT hr = S_OK;

_bstr_t strError;

ErrorPtr pErr = NULL;


try

{

// Enumerate Errors collection and display

// properties of each Error object.

long nCount = pConnection->Errors->Count;


// Collection ranges from 0 to nCount - 1.

for(long i = 0; i < nCount; i++)

{

pErr = pConnection->Errors->GetItem(i);

CString temp;

temp.Format("Error #%d\n", pErr->Number);

AfxMessageBox(temp);

temp.Format(" %s\n",(LPCSTR)pErr->Description);

AfxMessageBox(temp);

temp.Format(" (Source: %s)\n",(LPCSTR)pErr->Source);

AfxMessageBox(temp);

temp.Format(" (SQL State: %s)\n",(LPCSTR)pErr->SQLState);

AfxMessageBox(temp);

temp.Format(" (NativeError: %d)\n",(LPCSTR)pErr->NativeError);

AfxMessageBox(temp);



if ((LPCSTR)pErr->GetHelpFile() == NULL)

{

AfxMessageBox("\tNo Help file available\n");

}

else

{
CString temp1;
temp1.Format("\t(HelpFile: %s\n)" ,pErr->HelpFile);

AfxMessageBox(temp1);

temp1.Format("\t(HelpContext: %s\n)" , pErr->HelpContext);

AfxMessageBox(temp1);

}

}

}

catch(_com_error &e)

{

// Notify the user of errors if any.

PrintComError(e);

}

}


///////////////////////////////////////////////////////////

// //

// PrintComError Function //

// //

///////////////////////////////////////////////////////////


void PrintComError(_com_error &e)

{

// Notify the user of errors if any.

_bstr_t bstrSource(e.Source());

_bstr_t bstrDescription(e.Description());


// Print Com errors.


AfxMessageBox("Error\n");

CString temp;

temp.Format("\tCode = %08lx\n", e.Error());

AfxMessageBox(temp);

temp.Format("\tCode meaning = %s", e.ErrorMessage());

AfxMessageBox(temp);

temp.Format("\tSource = %s\n", (LPCSTR) bstrSource);

AfxMessageBox(temp);

temp.Format("\tDescription = %s\n", (LPCSTR) bstrDescription);

AfxMessageBox(temp);

}

How to set quota limits of disk in VC++

Tida15-Aug-02 3:00

Tida

15-Aug-02 3:00

Dear all,
I need to set quota limit for users on a shared folder on a file server.
How to implemented it in VC++? Is there a API function?

Thanks

Registry script problem

pankajdaga15-Aug-02 2:53

pankajdaga

15-Aug-02 2:53

Hi everyone,

I did not know where else to pose this question. So, here goes. If this is not the right place, please ignore it. Though, I would really appreciate some suggestions as to where to look.

I want to add an entry to the context menu of Windows explorer. Specifically, everytime someone right clicks on an XML file, I want to show a menu item which runs a python program. So I created the following registry entry file.

REGEDIT4

[HKEY_CLASSES_ROOT\.xml]
@="XMLfile"

[HKEY_CLASSES_ROOT\xmlfile]
@=""

[HKEY_CLASSES_ROOT\xmlfile\shell\Open with Something\command]
@="C:\\Python22\\wxPython\\tools\\boa\\boa.pyc"

This works fine, for any .EXE file. However, whenever I try to launch a python file, it does not work. It says [The XML file name] is not a valid Win32 document.

However, double clicking on boa.pyc runs it just fine. So, I do not know why it does not launch it.

Any suggestions or some registry scripts are welcome!

Pankaj

Without struggle, there is no progress

Re: Registry script problem

Jon Hulatt16-Aug-02 2:32

Jon Hulatt

16-Aug-02 2:32

a .pyc file still runs through the python exe. try changing:-

[HKEY_CLASSES_ROOT\xmlfile\shell\Open with Something\command]
@="C:\PATH\TO\PYTHON\PYTHON.EXE C:\\Python22\\wxPython\\tools\\boa\\boa.pyc"

STL is a religeon. Enquiries to Reverend Christian Graus

dynamic button on CFormView Child ??

AlinRO15-Aug-02 2:30

AlinRO

15-Aug-02 2:30

how can i put with Create function a working button on a Child Window of my mdi app derived from CFormView ?

<< Thank you people >>

Re: dynamic button on CFormView Child ??

Roger Allen15-Aug-02 3:56

Roger Allen

15-Aug-02 3:56

Add a meber varibale of the control type to your form view class. Then call Create on it in the OnInitialUpdate() procedure. You will also need to position the control correctly on your formview using MoveWindow() etc. If you re-size your form in OnSize() check to make sure the actual windows exist before trying to move them around.

CButton m_MyButton ;

m_MyButton.Create("STOP!", WS_CHILD | WS_VISIBLE | BS_OWNERDRAW | WS_TABSTOP | WS_CLIPSIBLINGS, CRect(0, 0, 10, 10), this, IDC_OF_YOUR_BUTTON) ;

m_MyButton.MoveWindow(...) ; // put button in correct place

Don;t forget to call m_MyButton.DestroyWindow() in the OnDestroy of your FormView.

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

dynamic button on CFormView ???

AlinRO15-Aug-02 2:29

AlinRO

15-Aug-02 2:29

how can i put with Create function a working button on a Child Window of my mdi app derived from CFormView ?

<< Thank you people >>

Re: dynamic button on CFormView ???

Alberto Giannetto15-Aug-02 3:48

Alberto Giannetto

15-Aug-02 3:48

if you're using MFC it shouldn't be too difficult to call Create on a CButton object that you can allocate dynamically - haven't tried myself I have to say Smile | :)

Registry problem...

code dope15-Aug-02 1:08

code dope

15-Aug-02 1:08

I'm producing a Web Viewer so that our customers can view the Images that we scan for them from anywhere. They enter the site and perform a search for the images and then view them. Their search details are saved in the Web Server's Registry and the fields(text boxes) are populated with their last query the next time they enter the site. The site is writen using ASP, Javascript and an ISAPI extension dll, using MFC, that does all the database stuff and file handling etc.

However, although I can read their last query from the registry, I cannot set values. I am using CRegKey::Open, with the access set to KEY_SET_VALUE ( I have tried KEY_WRITE and KEY_ALL_ACCESS ).

The RegConnectRegistry( ) function before it is succeeding OK.

I have tried using GetLastError() and then FormatMessage to get the Error Message but it returns "The operation was successful"!

Oh, the OS is W2k.

Any help would be greatly appreciated.

code as below:

// open the Registry Key and update it...
// connect to the Registry...
if ( RegConnectRegistry( NULL, HKEY_LOCAL_MACHINE , &m_RegKey.m_hKey ) != ERROR_SUCCESS )
{
#ifdef _DEBUG
MessageBox( NULL,"Unable to connect to Registry", "ERROR !", MB_DEFAULT_DESKTOP_ONLY );
#endif
return;
}
// and open (or create and open) the key...
if( m_RegKey.Create( m_RegKey.m_hKey, m_strSubKey, REG_NONE, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, NULL, NULL ) != ERROR_SUCCESS )
{
// if it fails, find out why...
int nGetLastError = GetLastError( );
#ifdef _DEBUG
FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM, NULL, nGetLastError, 0, (LPSTR)szBuffer, 255, NULL );
MessageBox( NULL, szBuffer, "ERROR - SetLastQueryData()", MB_DEFAULT_DESKTOP_ONLY );
#endif
return;
}

Thanx for your patience and any help,

code dope.

Re: Registry problem...

Anders Molin15-Aug-02 2:08

Anders Molin

15-Aug-02 2:08

I think it's because your web-application is running under the same security context as your users. If those users are anonymous the process dont have rights to write to that part of the registry.

Why don't you just save the data in a database?
It sounds a lot of data to save in the registry...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: Registry problem...

567890123415-Aug-02 2:34

5678901234

15-Aug-02 2:34

This is a typical case for using cookies.

Re: Registry problem...

code dope15-Aug-02 2:54

code dope

15-Aug-02 2:54

Thanks Alex - I'll look into it, although I'm afraid my knowledge on Cookies is absolutely Zero (I'm just an ordinary ol' C, C++ programmer who's venturing into the Big and scary new world of Web Development!). Is it fairly easy?

Thanx again,

code dope.

Re: Registry problem...

567890123415-Aug-02 3:20

5678901234

15-Aug-02 3:20

My knowledge in cookies is exactly as yours. However, I know that they are done exactly for such purpose - to keep client settings on client computer. I would ask the separate question about cookies in message board.

Re: Registry problem...

code dope15-Aug-02 2:50

code dope

15-Aug-02 2:50

Thanks, Anders, I think you're probably correct. However, unfortunately I am not permitted to create any new tables, views etc in the database.

The actual data is only about 10 words, so not really that much. Is there a way of changing the rights for an anonymous user without jeopardising the site, code, database etc.?

Thanx again,

code dope.

Re: Registry problem...

Anders Molin15-Aug-02 4:23

Anders Molin

15-Aug-02 4:23

You _clould_ change the security settings in the registry, but that would open up a huge security hole Dead | X|

How about saving the data in a (XML)file instead?

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: Registry problem...

Ryan B.15-Aug-02 9:00

Ryan B.

15-Aug-02 9:00

You definately want to use a Cookie, very simple in ASP. effin Simple.
I dont think a web application should ever store data in a registry entry.

Ryan Baillargeon
Software Specialist
Fuel Cell Technologies Inc.

Create a button on a CReBar Error !!

code_cold15-Aug-02 0:37

code_cold

15-Aug-02 0:37

In MainFrm.h
Add the following member:
CReBar m_wndReBar;
CButton m_wndButton;

In MainFrm.cpp
int CMainFrame::OnCreate(..) {
...
// I Add
m_wndButton.Create(_T("OK"), WS_CHILD | WS_VISIBLE, CRect(0, 0, 80, 20), this, AFX_IDW_TOOLBAR + 3);

m_wndReBar.AddBar(&m_wndToolBar);
...
}

But when the application displays, The button I create on the m_wndReBar is disabled, Why ??

It's me, code_cold

Re: Create a button on a CReBar Error !!

Tomasz Sowinski15-Aug-02 1:01

Tomasz Sowinski

15-Aug-02 1:01

You need to provide ON_COMMAND or ON_UPDATE_CMD_UI handler for your button.

Tomasz Sowinski -- http://www.shooltz.com

Never argue with an idiot, he'll bring you to his level and beat you with experience.

Memory leak

Janine15-Aug-02 0:35

Janine

15-Aug-02 0:35

Hello,

I apologise, if this question has been asked before. I couldn't check it because the search doesn't work.

There's a memory leak in my program. The part of the memory that leaks is allocated (at least) during call ProcessShellCommand(cmdInfo) and it is allocated by function CString::AllocBuffer(by line new BYTE[sizeof(CStringData) + (nLen+1)*sizeof(TCHAR)];). Is there anything I can do about this memory leak? Confused | :confused:

I mean because I don't directly call AllocBuffer myself, can I do anything about it?

BTW the start point of my program is main and I call InitInstance() and Run() from there, if it has something to do with this.

-Janetta

Re: Memory leak

Tomasz Sowinski15-Aug-02 0:47

Tomasz Sowinski

15-Aug-02 0:47

Why did you use your own 'main'?

Tomasz Sowinski -- http://www.shooltz.com

Never argue with an idiot, he'll bring you to his level and beat you with experience.

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