Managed C++/CLI

Wes Aday16-Jul-07 9:55

Wes Aday

16-Jul-07 9:55

The code as you wrote in your original message did a cout and then returned. It did that. Returning meaning that the program was finished so that the window closed. Getch() simply waits for keyboard input before the program continues.

If you were to run your program from a command prompt, you would not need the getch().

Why is common sense not common?

Never argue with an idiot. They will drag you down to their level where they are an expert.

Sometimes it takes a lot of work to be lazy

Paul Conrad16-Jul-07 10:07

16-Jul-07 10:07

Like Wes said, it closes right after running if it is a console app. If you run it from a Dos box, it'll stay there with the Dos prompt when done.

Good luck on learning C++. Dev C++ is nice, have you looked at the Express Editions of C++/C#?

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

Red Lake16-Jul-07 10:22

Red Lake

16-Jul-07 10:22

If you mean Visual Express, yes I have. I am thinking of getting a version of it if the price is right. Thanks for the response.

Steve Vondras
Red Lake Nation
MIS Tech
svondras@redlakenation.org

Paul Conrad16-Jul-07 10:52

Re: Registering Window Class

16-Jul-07 10:52

Red Lake wrote:
I am thinking of getting a version of it if the price is right.

You should. I think it is still FREE Big Grin | :-D

There was a way to get Visual Studio Standard Edition for "free" ( just pay the shipping and handling ) from Microsoft by watching two of their labcasts. I think it expired at the end of June. I'd keep an eye out for that.

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

Registering Window Class

john john mackey16-Jul-07 8:38

john john mackey

16-Jul-07 8:38

I need some help...
I have a dialog based app and I want to register the (window) class. So many question have I.

1) where do I put my code for registering the class?
2) do I use RegisterClass, RegisterClassEX, AfxRegisterClass, AfxRegisterClassEx?
3) REASON: interprocess communication using Windows Messaging

I have some legacy code that i'm looking at for an example, but it is a Doc-View type and it appears easier as it has the registeration inside the PreCreateWindow( ) function - see below

Thanks,
Johnny

<br />
#define MYAPPWINDOW_CLASSNAME	_T("MyOwnWindow")	//window class name<br />
<br />
BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)<br />
<br />
	//register MYAPPWindow class if not already registered<br />
	WNDCLASS  wndcls;<br />
	HINSTANCE hInst = AfxGetInstanceHandle();<br />
<br />
	if( !(::GetClassInfo(hInst, MYAPPWINDOW_CLASSNAME, &wndcls)) )<br />
	{<br />
	   if( ::GetClassInfo( hInst, cs.lpszClass, &wndcls ))<br />
	   {<br />
	      wndcls.lpszClassName = MYAPPWINDOW_CLASSNAME;<br />
	      wndcls.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(IDR_MAINFRAME));<br />
	      if( !AfxRegisterClass(&wndcls) )<br />
	      {<br />
	         AfxThrowResourceException();<br />
	         return FALSE;<br />
	      }<br />
	   }<br />
	   else<br />
	   {<br />
	      AfxThrowResourceException();<br />
	      return FALSE;<br />
	   }<br />
	}<br />
<br />
	cs.lpszClass = MYAPPWINDOW_CLASSNAME;<br />

Mark Salsbery16-Jul-07 9:51

Re: Registering Window Class

16-Jul-07 9:51

As a general rule, use the Afx functions in an MFC app and use the API functions in a Win32 app.

You can put the call anywhere as long as it gets called before attempting to create a window of
the registered class. PreCreateWindow() is fine.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

john john mackey16-Jul-07 11:52

john john mackey

16-Jul-07 11:52

I am still lost and now frustrated (with MSDN documentation on the matter.)

What I have is a dialog based app and inside my OnInitDialog(), I have put what is the beginnings of registering my window class..

When I do this, i get the runtime "warning" that "A required resource was unavailable." (i trace this to the second call to ::GetClassInfo() as I don't know how to properly supply the 2nd parameter.)

<code>BOOL CMyDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
//yadda yadda yadda

	// register MyOwnApp window class if not already registered

	WNDCLASS	wndcls;
	HINSTANCE hInst = AfxGetInstanceHandle();

	if( !(::GetClassInfo(hInst, MYOWNAPP_CLASSNAME, &wndcls)) )
	{
		if( ::GetClassInfo( hInst, NULL, &wndcls ))
		{
			wndcls.lpszClassName = MYOWNAPP_CLASSNAME;
//			wndcls.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(IDR_MAINFRAME));
			if( !AfxRegisterClass(&wndcls) )
			{
				AfxThrowResourceException();
				return FALSE;
			}
		}
		else
		{
			AfxThrowResourceException();
			return FALSE;
		}
	}

	return TRUE;  // return TRUE  unless you set the focus to a control
}
</code>

Re: Registering Window Class

Mark Salsbery16-Jul-07 12:28

Embedded null characters in record

16-Jul-07 12:28

I don't think you need the second call. Even if you did, using NULL as the second param isn't
documented.

If the first call fails, go ahead and register the class.

Actually, you can just call AfxRegisterClass(). MFC will check if it's already registered Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

BuckBrown16-Jul-07 8:36

BuckBrown

16-Jul-07 8:36

Hi, I'm using Visual Studio 2005 C++/CLI. I have a file with the following format:

DEVICE : TK65603
WAFER : 08
LOT : 006X
52 NULL 20 NULL 31 NULL <carriage return="">
52 NULL 18 NULL 26 NULL <carriage return="">...for 1000 records.

I am trying to set up a FileStream to read the data from this file for processing.

FileStream^ fileStream = gcnew FileStream(strFilePath, FileMode::Open);
StreamReader^ streamReader = gcnew StreamReader(fileStream);

The following reads the first threee lines just fine.
strDeviceName = streamReader->ReadLine();
strWaferNumber = streamReader->ReadLine();
strLotNumber = streamReader->ReadLine();

But then if I try to read the next line the command terminates at the NULL character and all I have in my variable is the first of the three fields (52). I have tried some variations of BiaryReader also. What approach would anyone recommend to work around this issue?

Buck

Re: Embedded null characters in record

Paul Conrad21-Jul-07 18:53

Re: Embedded null characters in record

21-Jul-07 18:53

Are you still having trouble with this?

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

BuckBrown23-Jul-07 12:09

BuckBrown

23-Jul-07 12:09

No, I'm just reading the file one character at a time and checking for nulls. Seems to be working fine.

Thanks.

Buck

Re: Embedded null characters in record

Paul Conrad23-Jul-07 12:13

globale vairable for two diffrente methode

23-Jul-07 12:13

Sounds like you have it right now. Any problems let me know Smile | :)

"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus

abbd16-Jul-07 5:54

Re: globale vairable for two diffrente methode

16-Jul-07 5:54

hello,
how to declare a globale variable for 2 or all methodes ?

Mark Salsbery16-Jul-07 7:02

How to overload "=" operator in a class?

16-Jul-07 7:02

Is there a good reason you need to use global variables in a C++/CLI application?

If so, you can simply define a variable in any CPP file, outside of any function or class
declaration:

// Global int
int MyGlobalInt = 0;

To access the global variable from another CPP module, use "extern":

// MyGlobalInt exists in another module
extern int MyGlobalInt;

Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

ShadowBoi15-Jul-07 17:59

ShadowBoi

15-Jul-07 17:59

Hi, everyone,

Postfix p;
char *postfix = p.convertToPostfix(infix);
//p.convertToPostfix(infix) returns a pointer

I would like to write a method in Postfix class to overload the "=" operator so that the left pointer gets a deep copy of the right pointer(returns from a method in the class).

How do I write it?

Thanks.

Re: How to overload "=" operator in a class?

Mark Salsbery16-Jul-07 7:16

16-Jul-07 7:16

Here's one way (you'll have to do the actual deep copy yourself since I don't know the details of
your class - my sample implementation just demonstrates a possible deep copy scenario):

class Postfix
{
protected:
   someclass *pSomeClass;
public;
   Postfix* operator=(const Postfix *Src);
};
 
Postfix *Postfix::operator=(const Postfix *Src)
{
   // Perform deep copy of src to this object
   // (I used "this->" for clarity - these can be ommitted)
 
   if (this->pSomeClass)
      delete this->pSomeClass;
   this->pSomeClass = new someclass(...);
   ... copy Src->pSomeClass to this->pSomeClass ...
 
   return this;
}

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

listView c++ cli

abbd15-Jul-07 8:42

Re: listView c++ cli [modified]

15-Jul-07 8:42

hi;

i would add in listView, for this i need to declare an array of string:

String *subItems[] = new String*[10];<br />
subItems[4]="1";<br />
subItems[2]="2";<br />
subItems[3]="3";<br />
subItems[1]="4";<br />
subItems[5]="5";<br />
<br />
<br />
ListViewItem* itm = new ListViewItem(subItems);<br />
listView1->Items->Add(itm);

but it didn't work,
i try for :

<br />
cli::array<String ^, 1> ^ tabChaine = gcnew cli::array<String ^>(3);<br />
tabChaine[0] = "Element 1";<br />
tabChaine[1] = "Element 2";<br />
tabChaine[2] = "Element 3";<br />
<br />
this->listView1->Items->Add(tabChaine);

=> there are error :Error cannot convert parameter 1 from 'cli::array<type,dimension> ^' to 'System::String ^'

Thank you verry mutch

Mark Salsbery15-Jul-07 10:01

15-Jul-07 10:01

You need to use the .NET framework classes documentation.

There's no ListView.ListViewItemCollection.Add() overload that takes an array of Strings as a
parameter.

You could add one string at a time:

listView1->Items->Add("Element 1");
listView1->Items->Add("Element 2");
listView1->Items->Add("Element 3");

or maybe use ListView.ListViewItemCollection.AddRange().

Mark

-- modified at 16:07 Sunday 15th July, 2007

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

George L. Jackson15-Jul-07 15:46

George L. Jackson

15-Jul-07 15:46

By the way, your code is wrong as far as creating an array of strings! It should be:

<br />
array<String^>^ tabChaine = gcnew array<String^>(3);<br />

"We make a living by what we get, we make a life by what we give." --Winston Churchill

Mark Salsbery16-Jul-07 7:18

16-Jul-07 7:18

I assumed his angle brackets got html-formatted out.

That could be a completely invalid assumption Smile | :)

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

George L. Jackson17-Jul-07 11:44

George L. Jackson

17-Jul-07 11:44

Sorry, your assumption was correct. I loaded the source HTML and found:

cli::array<String ^, 1> ^ tabChaine = gcnew cli::array<String ^>(3);

I guess we need to learn to check "Ignore HTML tags in this message" more often.

Big Grin | :-D

Geo

P.S. Thanks for your great answers and sense of humor in this forum.

"We make a living by what we get, we make a life by what we give." --Winston Churchill

Mark Salsbery17-Jul-07 13:12

Declaration of global variables

17-Jul-07 13:12

George L. Jackson wrote:
I loaded the source HTML and found

Too much work for me....if I can't assume (wrongly or not) I'll ask the OP to repost.
I'm lazy Smile | :)

Thank you for your great posts as well! I just migrated all my code to VS2005 within the last
week. I've been using managed extensions for .NET coding so I put alot of stuff off so I
wouldn't get nailed with migration issues. Now that I can use it, I'm always watching posts for
new tips on managed code!

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++

"Great job team! Head back to base for debriefing and cocktails."

abbd14-Jul-07 14:02

Re: Declaration of global variables

14-Jul-07 14:02

i have creat capture.h et capture.cpp, in 1st i declared all variables us folow:

 <br />
class capture<br />
{<br />
public:<br />
	 capture(void);<br />
	~capture(void);<br />
public:<br />
	int i;<br />
	int k;<br />
	void Ap();<br />
};

and for capture.cpp

<br />
#include "StdAfx.h"<br />
 <br />
#include ".\capture.h"<br />
 <br />
using namespace System;<br />
 <br />
void capture::Ap() {...........................}

When i add capture.h {#include "capture.h"}in forme1.h, knowing that variable i déclared in capture.h.
In form1.h i use a variable i without declaration, there are error 'i' : undeclared identifier .

Please help me,

Thank you verry mutch

Mark Salsbery14-Jul-07 16:52

Re: Declaration of global variables

14-Jul-07 16:52

You haven't shown any global variables. All the variables shown are members of the class
capture.

You also didn't show how and where you try to use 'i'.

Mark

Mark Salsbery
Microsoft MVP - Visual C++

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abbd15-Jul-07 1:10