Managed C++/CLI

8-Oct-08 7:14

If it's really urgent, please post it on the correct board[^].

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: urgent

Paul Conrad9-Oct-08 7:03

Paul Conrad

9-Oct-08 7:03

charusood wrote:
please help me to solve it

No. You should have been paying attention in class.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Header in namespace

piwi1337-Oct-08 22:30

piwi133

7-Oct-08 22:30

Hello again!
I got an "undefined reference" again, but I don´t know why!
Maybe someone could help me!
The compile-command is:

g++ -o headerblub.exe main.cpp header.cpp blub.cpp

Here´s the code:

main.cpp:

#include "header.h"
int main(int argc, char **argv)
{
	HeaderTest h;
	h.headerH();

	return 0;
}

header.h:

#ifndef HEADER_H
#define HEADER_H

namespace Headerns
{
	#include "blub.h"
}

class HeaderTest
{
	public:
		void headerH();
};

#endif

header.cpp:

#include "header.h"
void HeaderTest::headerH()
{
	Headerns::blub();
}

blub.h:

#ifndef BLUB_H
#define BLUB_H

void blub();

#endif

blub.cpp:

#include "blub.h"
#include <iostream>

using namespace std;

void blub()
{
	cout << "Hurra" << endl;
}
</iostream>

Thanks a lot!

Stefan

Re: Header in namespace

Mark Salsbery8-Oct-08 7:21

8-Oct-08 7:21

First, you're on the wrong board.

Visual C++/MFC[^] is for non-managed C++ questions.

Second, why would you #include a file within a different namespace?

I don't have g++ so I can't try your code.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Header in namespace

piwi1338-Oct-08 22:39

piwi133

8-Oct-08 22:39

oh, I´m sorry. I´m new here and I don´t have an overview about the board yet.

I have to include the file in a namespace for a project I´m working on. But I found out the sollution by changing the blub.cpp into:

#include "header.h"
#include <iostream>

void Headerns::blub()
{
	std::cout << "Hurra" << std::endl;
}</iostream>

Re: Header in namespace

Mark Salsbery9-Oct-08 5:06

Visual c++ Net Designer Class disapear [modified]

9-Oct-08 5:06

Here's what I'm talking about...

This makes usage difficult and error prone:

namespace Headerns
{
	#include "blub.h"
}

Why should you have to always remember to wrap the #include in
a namespace?

Why not do this instead:

/////////////////
//blub.h
/////////////////

#ifndef BLUB_H
#define BLUB_H

namespace Headerns
{
   void blub();
}
 
#endif


/////////////////
//blub.cpp
/////////////////

#include "blub.h"
#include 

using namespace std;

void blub()
{
	cout << "Hurra" << endl;
}

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

mikobi7-Oct-08 3:11

mikobi

7-Oct-08 3:11

I am using Visual C++ NET 2005,

I have create one form called "User".

After some handling, in my Solution Explorer, I don't see again my Designer interface (User.h[design]).

But User.h and User.cpp files exist.

How can I view again My design Interface ?

I don't Understand This problem

modified on Wednesday, October 8, 2008 1:38 AM

dybs10-Oct-08 18:56

dybs

10-Oct-08 18:56

Have you tried closing the designer, recompiling your code, and then re-opening the designer? If this doesn't work, could you provide some more details? When you try to view the designer, do you get any particular error messages?

mikobi12-Oct-08 19:39

mikobi

12-Oct-08 19:39

I have do it: to close the program ad to open again, when I click on design interface I have I red cross with this message(it is not exactly the same words but the same idea ):

Your design interface can not be open due to error. To fix it your rebuild the project or correct codes.

Why in this version, we have this kind of problem ?

leonigah18-Dec-08 22:53

leonigah

18-Dec-08 22:53

your form class should be first class in the namespace, if there is other class before your form class, move that class.

Nigah M Manzoor

Can't deliver MediaSample to two different output pins - Directshow problem

Dirkus Maximus18-Feb-10 18:16

Dirkus Maximus

18-Feb-10 18:16

This is probably far too late, but wanted to add this for the record - I had a similar problem and solved it by clicking on the h file in question, look in the 'properties'window on the right and set the 'File Type' to 'Form' (somehow it had been reset to 'h file'

itchy237-Oct-08 2:13

itchy23

7-Oct-08 2:13

I'm writing a transformfilter with 1 input and 2 output pins. I've derived my Transformfilter from CBaseFilter and the pins from CBaseInputPin and CBaseOutputPin. I'm pretty sure my Filter works because if I've only 1 Pin the sample process how it should, but if I add the second output pin the video stops with the first sample on one window a shows nothing on the second window.

When I debug the second time i call GetDeliveryBuffer i get the error code -2147220975.

Here is what i did in the method Receive:

hr = pOutputPin1->GetDeliveryBuffer(&pOutSample1, NULL, NULL, 0);
hr = Copy(pSample, pOutSample1);
hr = Transform1(pSample, pOutSample1);
hr = pOutputPin1->Deliver(pOutSample1);
pOutSample1->Release();

hr = pOutputPin2->GetDeliveryBuffer(&pOutSample2, NULL, NULL, 0);
hr = Copy(pSample, pOutSample2);
hr = Transform2(pSample, pOutSample2);
hr = pOutputPin2->Deliver(pOutSample2);
pOutSample2->Release();

What am i doing wrong?

Re: Can't deliver MediaSample to two different output pins - Directshow problem

Mark Salsbery7-Oct-08 4:36

Re: Can't deliver MediaSample to two different output pins - Directshow problem

7-Oct-08 4:36

You may get an answer, but generally DirectShow questions
don't get much love here.

I know there's a couple MVPs that really know this stuff....you can
find them here:

MSDN DirectX.Video Newsgroup[^]

Hope that helps!
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Mark Salsbery9-Oct-08 8:25

Re: Can't deliver MediaSample to two different output pins - Directshow problem

9-Oct-08 8:25

Hi itchy,

I see you're getting a little help over on the other board.

I was just thinking, if you're delivering the same samples to both
output pins, why not just use a single output pin into an infinite tee filter?

Just a random thought,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

itchy239-Oct-08 21:09

itchy23

9-Oct-08 21:09

Yeah I'm getting help, but up until now nothing is working.
I know I could use the inftee filter, but I don't want that because I'm making changes to both samples. If I use inftee filter I need to write 2 filters.
Besides its good practice, if it would work Wink | ;)

.

Thanks by the way for redirecting me.

Event handling in C

massaslayer6-Oct-08 4:39

massaslayer

6-Oct-08 4:39

I've read this thing: http://www.codeproject.com/KB/winsdk/console_event_handling.aspx[^]

but it's still not clear where i put the codes...

the main idea is:

that the user is not possible to close the console window by pressing X.

Please help me, i've spend houres searching

Re: Event handling in C

Mark Salsbery6-Oct-08 6:26

Program too big to fit in memory

6-Oct-08 6:26

Please post on the Visual C++/MFC board[^].

This board is for Managed C++/CLI questions only.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cyrilix3-Oct-08 10:57

3-Oct-08 10:57

I have a Managed C++ Windows Forms program that I'm compiling in Visual Studio 2003. When I try to run it, it tells me "Program too big to fit in memory" in a command prompt.

Does anyone know why it would even pop up with a command prompt window when this is a Windows application? Secondly, why would I get this error? Sources from google tell me that usually, this has to do with a corrupt installer issue, but this is not an installer at all.

Thanks.

Cyrilix3-Oct-08 13:00

3-Oct-08 13:00

I think I might've found the issue. I believe it lies with trying to reference an unmanaged lib (not compiled with managed extensions in C++), from a project that is compiled into a managed executable (managed extensions enabled). From what I've read, it seems to me (so far) that the only way to do this is to use a .dll and PInvoke, but is there any way to simply use a .lib?

Mark Salsbery3-Oct-08 14:49

3-Oct-08 14:49

The lib should work fine. C++/CLI lets you call code in static and
dynamic libraries without p/invoke.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cyrilix3-Oct-08 21:44

3-Oct-08 21:44

Hi Mark,

Thanks for the info, however, here's the problem. The first time I do a build, it always fails with a LNK1000 error where essentially, VC7's link.exe throws some kind of exception. If I try to build it again, it succeeds. Always. The only problem is, that the generated executable is invalid. At first, I couldn't figure out what was wrong. Then, because I suspected some kind of dependency issue, I ran depends.exe on the generated executable, and it told me that the PE header was invalid (or something to that effect). Then, that was where I suspected the managed/unmanaged stuff.

I should also note that I have a solution of 3 projects, 1 of which is the executable (managed), 1 of which is a static library (managed), 1 of which is a static library (unmanaged). If I remove the unmanaged static library from its reference list or dependency chain, building the executable complains about linker errors (as expected, since I have not defined the symbols). As soon as I add the unmanaged static library, I get the LNK1000.

Mark Salsbery4-Oct-08 7:13

4-Oct-08 7:13

Cyrilix wrote:
1 of which is a static library (managed)

I'm not sure how well that's going to work, nor can I find any
solid confirmation one way or the other.

Binding of managed types in a library is done at the assembly level.
I'm not sure how well the linker's going to handle that.

A managed class library (DLL) is the appropriate way to make a managed
library (even if it has native code in it as well).

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cyrilix4-Oct-08 8:45

4-Oct-08 8:45

Well, the way it works is that I have a managed static lib that contains my __gc classes. Then, I have an unmanaged static lib depending on and using the managed static lib that contains regular (non __gc) classes, which is sort of my interface to the native world. I've been able to use this interface with other classes from native code without problem. Then, I have a Winforms app which depends on that native interface. Now that I think of this, it doesn't really make sense as to why I'm doing it this way. I'm sort of going Managed->Unmanaged->Managed... might as well see if I can cut out the middle layer.

Mark Salsbery4-Oct-08 7:24

4-Oct-08 7:24

Cyrilix wrote:
I'm compiling in Visual Studio 2003

I definitely recommend moving to at least VS 2005 (VC 8) any way you can,
as soon as you can, before investing a lot of time in code that is incompatible
with newer/future C++ compilers.

With VC8+, you get the actual C++/CLI language instead of the Managed Extensions
you are using with VC7, which aren't supported anymore (there's a compiler switch
to allow it...for now).

The Managed Extensions for C++ syntax is deprecated.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cyrilix4-Oct-08 8:46