Managed C++/CLI

CLR C++ Q. Does BYTE b[10] create a ref class System.Array?

9-Jul-09 6:49

Will5801 wrote:
// WHAT EXACTLY IS THE STORAGE TYPE FOR THIS int ?

That's a native int on the CRT heap.

Will5801 wrote:
// PRESUMABLY ON THE UNMANAGED HEAP, BUT HOW CAN THIS HAPPEN FOR INT?
// DOESN'T INT ALWAYS MAP TO System.Int32?

You're using int in the native context (*, new) so the compiler
can infer what int to use....the native one in this case.

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

Will58019-Jul-09 3:15

Will5801

9-Jul-09 3:15

// IN A CLR C++ PROJECT

// AN ARRAY. SHOWS IN LOCALS WINDOW AS TYPE array
array<byte> ^ a = gcnew array<BYTE>(10);

// A BYTE ARRAY. SHOWS IN LOCALS WINDOW LIKE A NATIVE ARRAY
BYTE b[10];
b[0] = 5;

// A POINTER
LPBYTE p = &b[0];

The pointer is to be passed to api as a buffer to fill

The question: is b actually a ref system.array instance and
therefore pin_ptr should be used instead? If so this must
cause some subtle bugs?

Re: CLR C++ Q. Does BYTE b[10] create a ref class System.Array?

Mark Salsbery9-Jul-09 6:50

Re: CLR C++ Q. Does BYTE b[10] create a ref class System.Array?

9-Jul-09 6:50

Will5801 wrote:
The question: is b actually a ref system.array instance

No.

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

ant-damage2-Sep-09 1:04

ant-damage

2-Sep-09 1:04

but in C#:

byte[] b;

creates an instance for system.array

Threading issue

bubuzzz6-Jul-09 22:12

bubuzzz

6-Jul-09 22:12

Hi all,

Recently, I am trying openCV to detect the face. All the methods work well. Now I want to compare all the methods at the same time, that means i have to use multi thread to archieve this purpose. Here is my code

In my form (Form1.h), i declared :

private: System::Threading::Thread^ trd;

and initialized the thread:

trd = gcnew Thread( gcnew ThreadStart( this->compareAlg));

and this is the compareAlg function:

private: static System::Void compareAlg ()
		 {
			 SCM *objSCM = new SCM ();
			 VAJ *objVAJ = new VAJ();
			// MHI *objMHI = new MHI();
			 
			 objVAJ ->showFaceDetect_Cam("Resource\\face.xml");
			 objSCM ->showFace_SkinDetect_Cam();
			 Thread::Sleep (0);
			 //objMHI ->showFace_MHI ();
		 }

i also used a button to start the thread:

private: System::Void btnCompare_Click(System::Object^  sender, System::EventArgs^  e) {
			 trd->Start ();
		 }

The code compile well but the methods (showFaceDetect_Cam and showFace_SkinDetect) run sequently. What i want is the output of these methods appear at the same time on the screen. Can you suggest some advices, please? The thread code is found from http://msdn.microsoft.com/en-us/library/system.threading.thread.aspx

Thanks

Re: Threading issue

Mark Salsbery7-Jul-09 7:21

7-Jul-09 7:21

bubuzzz wrote:
The code compile well but the methods (showFaceDetect_Cam and showFace_SkinDetect) run sequently.

That's because you call them sequentially. If you want them to run
in parallel, you need a separate thread for each.

Mark

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

Re: Threading issue

bubuzzz7-Jul-09 21:16

bubuzzz

7-Jul-09 21:16

thank you very much

turning off command line

parth_patel2-Jul-09 6:18

2-Jul-09 6:18

How do I turn of command line in C++ managed forms projects from project configuration only, I already have created and compiled the project?

I am using VS 2010. But I guess that option should be the same as in VC++ 9.

Thanks,
Parth

parth_patel2-Jul-09 6:19

2-Jul-09 6:19

I created the project ground up from empty one.
That's why I am having a command line window along with my form.

parth_patel2-Jul-09 6:40

2-Jul-09 6:40

One more question:

How do I get the resource files to compile as separate satellite assemblies rather than in the exe itself.
Right now I have 5 language resources, all of which are getting compiled into the EXE itself.
I want them to be separate as they should be.

This resources are Form resources. I have named them appropriately with .en-US.resx, .de-De.resx etc names

Mark Salsbery2-Jul-09 12:19

2-Jul-09 12:19

What "command line" are you referring to?

If you mean a command window, then there shouldn't be one by default in a Forms app.

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

parth_patel4-Jul-09 6:07

4-Jul-09 6:07

Yes, I am talking about command window.
It is showing up. I created the app from scratch, so I guess there is some problem with configuration.
I did not create forms app using the VS wizard.

thanks,
parth

Using MemoryStream() in c++ program

teejayem5-Jul-09 4:23

teejayem

5-Jul-09 4:23

You need to change the subsystem to "windows". Read here[^] for more info

Don't be overcome by evil, but overcome evil with good

MrKBA2-Jul-09 3:40

MrKBA

2-Jul-09 3:40

Hello,

I'm trying to create a dll in C++ with VS 2008 and creating an object MemoryStream.
So i write
MemoryStream *memStreamEncryptedData = new MemoryStream();

I included But it not work and i have a error message like this :

Error 1 error C2065: 'MemoryStream' : undeclared identifier
Error 2 error C2146: syntax error : missing ';' before identifier 'memStreamEncryptedData'
Error 3 error C2065: 'memStreamEncryptedData' : undeclared identifier
Error 4 error C2061: syntax error : identifier 'MemoryStream'

Please help me how can use it or if there is something else wich do the same work.

Thank you

led mike2-Jul-09 4:25

led mike

2-Jul-09 4:25

khaliloenit wrote:
Please help me how can use it or if there is something else wich do the same work.

Well you have to learn C++/CLI to use it or any other .NET classes. There are several introductory articles for C++/CLI here on CodeProject in the Articles or "CHAPTERS" part of the site.

MrKBA3-Jul-09 0:10

MrKBA

3-Jul-09 0:10

So, have you please an example or some code to try it? I couldn't use C++/CLI and i had some problems with the included files.

Thank you

Member 18414221-Oct-10 1:36

Member 184142

21-Oct-10 1:36

Listillo estirado

parth_patel2-Jul-09 6:14