Live Redirection - C / C++ / MFC Discussion Boards

ThatsAlok16-Oct-06 18:35

16-Oct-06 18:35

minihotto wrote:
I dont understand that both them are string.
why as long as I put the string variable int the function, it has an error?

better post it in it specific forum Managed C++[^]

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

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Alok Gupta
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Re: a simple question

Steve S16-Oct-06 21:41

Steve S

16-Oct-06 21:41

Yup.

System::String is a Managed C++ string, while std::string is an STL string. You need a way of getting the contents of the first in a format that the STL string operator(s) can understand. You'd do better asking in the Managed C++ forum, I think.

Steve S
Developer for hire

error....with oledb connection string

With_problem16-Oct-06 17:31

With_problem

16-Oct-06 17:31

I am trying to add this oledb connection string in my program but it gives me erroe ?can anybody tell me what went wrong,do i need to include any thing in header or ....anything else

<br />
OleDbConnection* conn = new OleDbConnection(<br />
<br />
"PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=c:\\test.mdb");<br />
conn->Open;<br />
<br />

Error:

C2065: 'OleDbConnection' : undeclared identifier
: error C2065: 'conn' : undeclared identifier
: error C2061: syntax error : identifier 'OleDbConnection'
: error C2227: left of '->Open' must point to class/struct/union

Re: error....with oledb connection string

Hamid_RT16-Oct-06 19:21

Hamid_RT

16-Oct-06 19:21

It seems you need to inlcude.

WhiteSky

Re: error....with oledb connection string

With_problem16-Oct-06 19:29

With_problem

16-Oct-06 19:29

include what

Re: error....with oledb connection string

prasad_som16-Oct-06 19:38

prasad_som

16-Oct-06 19:38

abrakadbra wrote:
include what

Header having definition of class OleDbConnection.

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

Re: error....with oledb connection string

Mark Salsbery17-Oct-06 7:16

Mark Salsbery

17-Oct-06 7:16

Isn't that a managed class? .NET?

Namespace is System.Data.OleDb

Live Redirection

rupert_durans16-Oct-06 16:54

rupert_durans

16-Oct-06 16:54

Hello Everyone,

I'm a newbie, Please help me!

I'm adopting the code that could redirect a console output into the MFC Edit box.
My problem is, i want to have a live redirection from the console output to the edit box because i have a console application that will run about 5-10 mins and produces lots of information (output) in between those time in the command line.
My recent code will just wait the application to finish up before it could redirect the output from the command line to the Edit box.

Please help!.... Smile | :)

thank you very much..

-rupert-

i need to learn more... i want to be like you guys... i'm just a begginer

Re: Live Redirection

Owner drawn16-Oct-06 19:28

Owner drawn

16-Oct-06 19:28

rupert_durans wrote:
My problem is, i want to have a live redirection from the console output to the edit box because i have a console

Does this[^] article by Sudheesh P.S. help you.

Owner drawn
Jesus Loves

Re: Live Redirection

rupert_durans16-Oct-06 22:00

rupert_durans

16-Oct-06 22:00

Hello,

I tried to use the idea but it doesn't work, i even tried to download the code and tried to manipulate it, it still doesn't work...
It even hanged when i tried to read from console...

thanks

i need to learn more... i want to be like you guys... i'm just a begginer

Dll Loading Visual Studio 6.0 VC++

ccp99916-Oct-06 14:30

ccp999

16-Oct-06 14:30

I have a project which loads couple dlls. By Default, it loads from Windows/System32. I was trying to debug the problem with it's crash. And I would like to build a debug version with all the dll files that could run from the same directory as my main executable. However, some dll were loaded from the debug directory only which means if I delete the dlls from the debug directory of my project then it won't run. Even if I put the dlls in the same directory as the main exe or the windows/system32.

What kind of setting in my project could lead the loading of a dll from debug directory?
Or how could I set the dll loading always look for current directory and then windows/system32?

Thanks

ccp
PS...Visual Studio 6.0 VC++

-- modified at 21:58 Monday 16th October, 2006

Re: Dll Loading Visual Studio 6.0 VC++

prasad_som16-Oct-06 19:45

prasad_som

16-Oct-06 19:45

Use explicit linking (LoadLibrary) instead of implicit. Giving path of dll you want.

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

creating a thread

xJorDyx16-Oct-06 10:21

xJorDyx

16-Oct-06 10:21

im trying to create a thread to listen on a port for incomming data but i keep getting errors

HANDLE Handle_Of_listener = 0;
Handle_Of_listener = CreateThread( NULL, 0, listener, &s, 0, NULL);
when i try to compile that it returns:
.\main.cpp(34) : error C3867: 'Messenger::listener': function call missing argument list; use '&Messenger::listener' to create a pointer to member

soo i do what it says and create a pointer to my listener() function

Handle_Of_listener = CreateThread( NULL, 0, &listener, &s, 0, NULL);

errors:
.\main.cpp(34) : error C2276: '&' : illegal operation on bound member function expression

i mean come on i do what it tells me to the says it's illegal!!

Re: creating a thread

Mark Salsbery16-Oct-06 10:36

Mark Salsbery

16-Oct-06 10:36

The problem is not in the CreateThread() call.
It's in the declaration of Messenger::listener

How are you declaring that function in your Messenger class?

EDIT: It should be

static DWORD WINAPI listener(LPVOID lpParam);

Mark

Re: creating a thread

xJorDyx18-Oct-06 11:51

xJorDyx

18-Oct-06 11:51

i am now getting this error when i declared it as
static DWORD WINAPI listener(SOCKET s)
.\main.cpp(34) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'DWORD (__clrcall *)(SOCKET)' to 'LPTHREAD_START_ROUTINE'

Re: creating a thread

Mark Salsbery18-Oct-06 12:03

Mark Salsbery

18-Oct-06 12:03

You want to pass the SOCKET to the thread procedure correct?

Declare your class-member thread procedure as

static DWORD WINAPI listener(LPVOID lpParam);

Write the function something like this:

DWORD WINAPI myclass::listener(LPVOID lpParam)
{
	SOCKET s = (SOCKET)lpParam;

	... do stuff with the socket...

	return 0;//
}

Create the thread something like:

HANDLE Handle_Of_listener_thread = 0;
Handle_Of_listener_thread = CreateThread( NULL, 0, listener, (LPVOID)s, 0, NULL);

Better?

Mark

Re: creating a thread [modified]

xJorDyx19-Oct-06 9:08

xJorDyx

19-Oct-06 9:08

thank you!
i shall try this as soon as i get home!

-- modified at 16:06 Thursday 19th October, 2006
still getting stupid errors
main code: (some part removed)

// Messenger class!
ref class Messenger : public Form
{
public:
static DWORD WINAPI listener(LPVOID lpParam);//line 26
SOCKET s;
bool conected;
HANDLE Handle_Of_listener;
Messenger()
{
InitForm();
if(ConnectToHost(1234,"127.0.0.1") == true)
{
printf("conected!");
conected = true;
HANDLE Handle_Of_Thread_1 = 0;
Handle_Of_listener = CreateThread( NULL, 0, listener, &s, 0, NULL);//line 38

}

}
static String ^myUsrName;

private:
// Win controls, Icon & Menu
RichTextBox ^ MessengerTxtR;
RichTextBox ^ MessengerTxtS;
array<Button^>^ MessengerButtons;
static String^ s_strZero = String::Format("0{0}0", System::Globalization::NumberFormatInfo::CurrentInfo->NumberDecimalSeparator);

System::Drawing::Icon^ m_pCalcIco;

MainMenu^ m_pMessengerMenu;
MenuItem^ m_pFileMenu;
MenuItem^ m_pAboutMenu;
MenuItem^ m_pExitMenu;
public:

DWORD WINAPI listener(LPVOID lpParam)//line 62
{//line 63
SOCKET s = (SOCKET)lpParam;
return 0;
}

error:
.\main.cpp(26) : warning C4441: calling convention of '__stdcall ' ignored; '__clrcall ' used instead
.\main.cpp(63) : warning C4441: calling convention of '__stdcall ' ignored; '__clrcall ' used instead
.\main.cpp(63) : error C2686: cannot overload static and non-static member functions with the same parameter types
.\main.cpp(26): could be 'DWORD Messenger::listener(LPVOID)'
.\main.cpp(62): or 'DWORD Messenger::listener(LPVOID)'
.\main.cpp(38) : error C2664: 'CreateThread' : cannot convert parameter 3 from 'DWORD (__clrcall *)(LPVOID)' to 'LPTHREAD_START_ROUTINE'
None of the functions with this name in scope match the target type

Re: creating a thread

xJorDyx24-Oct-06 7:13

xJorDyx

24-Oct-06 7:13

see post above

Image

messages16-Oct-06 8:52

messages

16-Oct-06 8:52

I have a Image on my dialog this picture is on the WM_ERASEBKGND and its work fine but I have a problem
when I move my program or if I move a program on my program then Mem Usage of my program increase How can I solve this problem. And I have another question
if I use of a code like this on WM_PAINT It increase PF Usage and Mem Usage of my program or no

<br />
void CMyPicture::OnPaint()<br />
{<br />
CPaintDC dc(this); <br />
	CRect rect(0,650,830,520);<br />
	CBrush m_Brush2;<br />
m_Brush2.CreateSolidBrush(RGB(255,255,255));<br />
	dc.FillRect(&rect,&m_Brush2);<br />
	m_Brush2.DeleteObject();<br />
}<br />

Thanks

Re: Image

Mark Salsbery16-Oct-06 9:01

Mark Salsbery

16-Oct-06 9:01

messages wrote:
if I use of a code like this on WM_PAINT It increase PF Usage and Mem Usage of my program or no

Are you leaking resources in your WM_ERASEBKGND handler??

Re: Image

messages16-Oct-06 9:25

messages

16-Oct-06 9:25

Thanks for your help I used of this code but when I move a program Mem Usage of my program on TaskManager increase
Is it problem does my code has problem

I read Image on with

m_Image.Load<code> OnInitDialog() method<br />
<code><br />
<br />
BOOL CMyPicture::OnEraseBkgnd(CDC* pDC)<br />
{<br />
Image.BitBlt(pDC->m_hDC,0,0,593,420,0,0,SRCCOPY);<br />
return TRUE;<br />
}<br />

my code is this only but I have this problem
Thanks

Re: Image

Mark Salsbery16-Oct-06 9:38

Mark Salsbery

16-Oct-06 9:38

Hmmm are you sure that's all you do in OnPaint() and OnEraseBkgnd()?

Your OnEraseBkgnd() wouldn't compile as you've shown it here.

Mark

Re: Image

viliam16-Oct-06 9:03

viliam

16-Oct-06 9:03

It's ok
probably you don't neet to call DeleteObject
(destructor will do it for you)
Anyway, for your example is better use FillSolidRect()
and you dont have to worry about memory at all

viliam

Re: Image

messages16-Oct-06 9:26

messages

16-Oct-06 9:26

Thanks for your help But why Mem Usage of my program increase can you help me
Thanks

Re: Image

Christian Graus16-Oct-06 10:10

Christian Graus

16-Oct-06 10:10

If you want this question answered, you need to post some code. The IDE will actually try to show you where the leaking memory was assigned, is it in your paint code at all ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

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