Managed C++/CLI

Problem with relative path in Webbrowser

14-Nov-06 13:19

First step - ask in the right forum
Second step - explain why you want to use a #define, and why you think replacing every instance of the number 1 with a string in your code is a good idea ( with luck, the compiler is stopping you from doing this )
Third step - when you ask for help, tell us the error you are getting.

Re: #define

Bram van Kampen14-Nov-06 16:34

Bram van Kampen

14-Nov-06 16:34

Maybe you should first read a few books on C, never mind CPP, or anything further. To start to explain what's wrong with your code would take far more space than the code you wrote. I can recommend Kernighan and Richie-for a starter!.

LateNightsInNewry

Miro L14-Nov-06 8:44

Miro L

14-Nov-06 8:44

Hello all,
I need to load a html document from a HDD. When I try it with absolute path everything works good. But I need to use relative path and it seems to be impossible. The one way how you can do it is something like this: String^ path = Application::StartupPath + "\\ok.htm". But I think there has to be another (maybe trivial) solution of this problem. Thank you in advance,

Enabling CLR caused a failure in my MFC window

earlgraham14-Nov-06 7:01

earlgraham

14-Nov-06 7:01

We started developing on VS2005 with Shared MFC and CLR enabled. Now one of my MFC windows in a subclass is failing. When I compile everything is fine, but when I compile I get an acceptation:
ENSURE(afxOccMgr !=NULL);

Here is my code examples

//In MainFrm.cpp
CMainFrame::CMainFrame()
{…
AfxEnableControlContainer();
…
	pMainFrm = this;
…
	AfxOleInit();
….
}

//in my subclass.h
Class Mysub : public CWnd
C3DWindow	*m_p3dWnd;

//in my subclass.cpp
Extern CMainFrame	*MainFrm;
…


MySub::Load()
{…
	m_ p3dWnd = new C3DWindow();
…
	bRet = m_ p3dWnd ->Create("Internal_Win", 0, Rect,
                           pMainFrm, ID_MEM, NULL, FALSE);
…
}

Note: My code from the stack that caused the acceptation is the above create. Any clues?

Thanks

Programmer
Glenn Earl Graham
Austin, TX

Linker errors

kumarangopi13-Nov-06 19:17

kumarangopi

13-Nov-06 19:17

Bad object record file number in module c:\tc\lib\graphics.lib
How to rectify this error?another doubt is that by default turbo c 3.0 supports egavga.bgi graphic drive only?how to show a image in svga graphic drive?
Thanks in advance, you can mail me at kumarangopi@yahoo.com

Re: Linker errors

Christian Graus13-Nov-06 19:31

constructor and destructor

13-Nov-06 19:31

If you're using TurboC, odds are you need to find a forum where others are using it.

Odds are also even lower that you're using managed C++, it seems more likely that you've asked in the wrong forum.

rajinder singh sikh13-Nov-06 7:19

rajinder singh sikh

13-Nov-06 7:19

WHY CONSTRUCTOR CAN'T BE VIRTUAL FUNCTION BUT DESTRUCTOR CAN BE.

RAJINDER SINGH SIKH

George L. Jackson13-Nov-06 8:16

13-Nov-06 8:16

Standard C++ does not support virtual constructors. However, read this: http://www.parashift.com/c++-faq-lite/virtual-functions.html#faq-20.8[^]

Also, your message was posted in the wrong forum.

Mark Salsbery13-Nov-06 11:28

Mark Salsbery

13-Nov-06 11:28

Dare I ask...
Why?
To create an object of the base type and have the compiler choose a derived class for me?

Christian Graus13-Nov-06 17:04

13-Nov-06 17:04

DON'T YELL !!!

Also, ask in the right forums next time. This is the MANAGED C++ forum.

serial comunication problems.....

Bram van Kampen14-Nov-06 16:44

Bram van Kampen

14-Nov-06 16:44

Take a step back, and think about it! Virtual functions are called from a list of function adresses. When you create a new class, the constructors are called first, starting with the base class constructors. Each Base class constructor edits the virtual function table. When your class is constructed, it is there for you to use.The same happens in the oposite direction, when your class is destroyed. You cannot have virtual constructors, because they would have to be called before the virtual function table could have been constructed. It is a case of chicken or egg first.

LateNightsInNewry

snimp13-Nov-06 7:13

snimp

13-Nov-06 7:13

Hi,
I´m pretty new in C++... and would like to get some help.
I´m connecting a device (a condutivimeter) to my RS232 COM1, and using BIOSCOM to comunicate with it, but I just can´t. (i just need to read from the port)
I´ve already done it with my other device (wich is a balance).
The device (condutivimeter) works with:
Baud rate 4800
Handshake: CTS/RTS + Xon/Xoff(this is the only difference between the devices)
Data bits : 8
Parity: none
Stop bit : 1

If somebody has some idea...
Thanks a lot

bruno Garcia

Re: serial comunication problems.....

George L. Jackson13-Nov-06 8:23

"how can I create wrapper class ?"

13-Nov-06 8:23

You posted in the (Managed) C++/CLI forum. I think you want to post this in the Visual C++ / MFC forum. People who can answer your C++ problems don't always come here. So, to better your odds of getting an answer, please post in the Visual C++ / MFC forum.

Orchid8512-Nov-06 3:07

Orchid85

12-Nov-06 3:07

Hi every one,
I don't know how can I create wrapper class,wrapper code,.. in C++,if anyone knows please tell me step by step or send me sample code or link for learning.
yours sincerely ,
Orchid

Re: "how can I create wrapper class ?"

George L. Jackson12-Nov-06 4:56

Re: "how can I create wrapper class ?"

12-Nov-06 4:56

Normally, you would have the wrapper class in an assembly. Also, I wrote the class methods inline for clarity only. This class CppWrapper is only a simple example. Marshalling can get a little complicated but it is quite easy most of the time. There is a lot of information on the internet about this, especially, written for Visual Managed C++ 2003.

using namespace System;
using namespace System::Runtime::InteropServices;

#include <iostream>

ref class CppWrapper
{
public:
void Print(String ^str)
{
IntPtr ptr = IntPtr::Zero;

try
{
ptr = Marshal::StringToHGlobalUni(str);

std::wcout << static_cast<wchar_t*>(ptr.ToPointer()) << std::endl;
}

catch (Exception ^ex)
{
Console::WriteLine(ex->Message);
}

finally
{
if (ptr != IntPtr::Zero)
Marshal::FreeHGlobal(ptr);
}
}
};

int main(array<System::String ^> ^args)
{
String ^str = L"Hello, World!";
CppWrapper ^wrapper = gcnew CppWrapper;

wrapper->Print(str);

return 0;
}

Orchid8513-Nov-06 2:16

Orchid85

13-Nov-06 2:16

Dear George,
Thanks a lot for your help,
The sample code was very useful for me.
thank you again,
yours sincerely ,
Orchid.

Help me please

toeh11-Nov-06 23:05

toeh

11-Nov-06 23:05

Hello,

I'm a newbie in computer programming.
I'm looking for a program help me to change file attributes(Created time,Modified time and last access) like FileDate By T.YogaRamanan.

Here is link :

http://www.codeproject.com/file/FileDate.asp[^]

But I want to ignore its user interface.(No Dialog box , No Text box)

I want to choose file as coding and change file attribute as coding too.

I have tried to read source code of FileDate above.
I still can't do.

Can you help me ? Smile | :)

Thank you.

Re: Help me please

George L. Jackson12-Nov-06 5:08

12-Nov-06 5:08

Well, the article, http://www.codeproject.com/file/FileDate.asp[^], was written in unmanaged C++ using MFC/Win32. So, is your question directed toward unmanaged C++ (then, you are in the wrong forum) or C++/CLI (Managed C++)?

Re: Help me please

Divyang Mithaiwala12-Nov-06 20:19

Divyang Mithaiwala

12-Nov-06 20:19

toeh wrote:
But I want to ignore its user interface.(No Dialog box , No Text box)

Then what is the problem.
U have to just take/use

int SetFileDateTime(char *szFilePath, 
            FILETIME ftCreated, 
            FILETIME ftModified, 
            FILETIME ftAccessed)

just copy that function or call that directly from ur module.

regards,
Divyang Mithaiwala
System Engineer & Software Engineer

Need Programs

Dragonad11-Nov-06 10:46

Dragonad

11-Nov-06 10:46

Hi,
My name is aditya. i am a BE student in mechanical engg. now one of the subject that i have is CAME(Computer application in mechanical engg.). So i have C++ papers in which some typical questions are asked. if u could please post me the solutions to these problems it will be greatful.

1.Use concept of operator overloading to add or multiply 4*4 matrix of user inputs.
2.Use class matrix to read store display and perform multiplication operation between 2D matrix size user defined. Use 'new' and 'del' operator for creating and destroying matrix objects.
3.To draw a line of user defined length. using 'inheritance' show modification in this code to draw a rectangle of user defined dimensions.
4.A small calculator which performs +,-,*,/, and displays results only ater = key is pressed. Also displays the answer in scientific notation.

Pls i beg u to solve this problem.

My email id is- ads99free@yahoo.co.in

I need these solutions by saturday.i.e.18th november.

Confused | :confused:

Re: Need Programs

George L. Jackson11-Nov-06 11:42

11-Nov-06 11:42

I suggest you hire a tutor, bud. I and many others aren't going to do your homework.

Re: Need Programs

Christian Graus12-Nov-06 7:11