C / C++ / MFC Discussion Boards

How to define operator = in CStringArray?

ooosawaddee32-Nov-02 3:08

2-Nov-02 3:08

I write this below function to return CStringArray.

<br />
CStringArray info;<br />
info = m_Proc.Getinfo(m_arrFileName, m_arrPassword);<br />

When I compile there are error message show like these

<br />
error C2582: 'CStringArray' : 'operator =' function is unavailable<br />
error C2582: 'CStringArray' : 'operator =' function is unavailable<br />
error C2679: binary '+=' : no operator defined which takes a right-hand operand of type 'class CStringArray' (or there is no acceptable conversion)<br />
error C2558: class 'CStringArray' : no copy constructor available<br />

Do you know how to define operator = in CStringArray? Are there another way to do that?

Thank you for your answer.

Re: How to define operator = in CStringArray?

Dominik Reichl2-Nov-02 3:26

Dominik Reichl

2-Nov-02 3:26

Use the Copy member function of CObArray:

CStringArray info;
info.Copy(m_Proc.Getinfo(m_arrFileName, m_arrPassword);

Getinfo must return a CStringArray.

Try it. Big Grin | :-D

-Dominik

ask another question

ooosawaddee32-Nov-02 3:57

ooosawaddee3

2-Nov-02 3:57

Thank you for your answer Dominik.

I want to ask you another question that I write Getinfo function to return CStringArray.

CStringArray CCrypt::Getinfo(const CStringArray& fileName, const CStringArray& password) <br />
{<br />
     CStringArray privkeyinfo;<br />
		..<br />
                ..<br />
                ..<br />
	return privkeyinfo;<br />
}

But when I compile there are error message show
error C2558: class 'CStringArray' : no copy constructor available

Do you know how to solve my problem?

Re: ask another question

Dominik Reichl2-Nov-02 6:03

Dominik Reichl

2-Nov-02 6:03

The code you posted should work... are you sure that the error comes from this part?

Re: ask another question

dabs2-Nov-02 7:11

dabs

2-Nov-02 7:11

You're getting this error because CStringArray doesn't support copy constructing and thus cannot be used as a return value. I would change the function so it takes the return value as a reference parameter instead:

<br />
void CCrypt::Getinfo(<br />
    const CStringArray& fileName, <br />
    const CStringArray& password,<br />
    CStringArray& r_privKeyInfo )<br />
{<br />
    //rest of code as usual - copy results to<br />
    //r_privKeyInfo<br />
}<br />

Then call it like this:

<br />
CStringArray arrPrivKeyInfo;<br />
m_Proc.Getinfo(m_arrFileName, m_arrPassword, arrPrivKeyInfo );<br />

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Date Formating

Anonymous2-Nov-02 2:38

Anonymous

2-Nov-02 2:38

Forgive my ignorance for what has probably a simple answer...

I'm using the GetLocalTime API to print current system date:

SYSTEMTIME st;
::GetLocalTime (&st);

sprintf (m_date, "%02d/%02d/%2d",st.wMonth,st.wDay,st.wYear);
m_doc->nParseTime [url_info.URL_Index] = GetTickCount ();

Presently the date prints as "11/02/2002" How would I change to have date displayed as "11/02/02"?

Thanks Much Everyone

Re: Date Formating

Dominik Reichl2-Nov-02 2:51

Dominik Reichl

2-Nov-02 2:51

Simply do the following:

m_date[6] = m_date[8];
m_date[7] = m_date[9];
m_date[8] = 0;

This would change 11/02/2002 to 11/02/02.

OR

You use a specialized time formating function like this

size_t strftime( char *strDest, size_t maxsize, const char *format, const struct tm *timeptr );

-Dominik

add-in and adding right-click menu entries

John Clayton2-Nov-02 1:14

John Clayton

2-Nov-02 1:14

I was wondering if it is possible to add an menu item to the right-click popup menu in VC6.

I've taken a brief look at the WinTabs add-in (not it's code - the application itself), and it doesnt appear to put anything into the popup menu of the vc6 editor, the same goes for WorkspaceWhiz 2.12.

If there's a way - I'd love to have *any* information of ideas about how I could extend the popup.

Thanks!

Big Grin | :-D

--
John Clayton

setting DEVMODE structure

vgkotha2-Nov-02 1:11

vgkotha

2-Nov-02 1:11

hi i am writing my own dialogbox for printsetup. i have the problem to set "dmFields" member in the DEVMODE structure for orientation and copies.how can i assign my values to these memebers. please help me. if i give
pDevMode->dmFields=DM_ORIENTATION
pDevMode->dmFields=m_orientation.(m_orientation contains either 1 or 0);
but it's not setting with my value
please give help
thank you

Stupid debug question (concerning VC IDE)

User 66582-Nov-02 0:34

User 6658

2-Nov-02 0:34

Hi
Usually if you set a breakpoint in your program and hit F5, the program ist being started and debugged, so that you can watch variables, return values etc. Until yesterday I always had a small floating window (toolbar) in debug mode, where I could jump to the next function, to the end of the function and so on. But I accidently hit the [x]-button on that window, so that it disappeared. How do I make it visible again? I use VC6.

I know this question is stupid, but I didn't find a menu entry for reactivating it yet Roll eyes | :rolleyes:

thanks in advance

modified 12-Sep-18 21:01pm.

Re: Stupid debug question (concerning VC IDE)

carrie2-Nov-02 0:45

carrie

2-Nov-02 0:45

ehhhhhh, not too sure what you mean but you could try in the View->Debug menu or you could try using the Step In, Step Out and Step Over F9,F10,F11 keys. It sounds like thats what you're trying to do at least.

Re: Stupid debug question (concerning VC IDE)

Anonymous2-Nov-02 0:49

Anonymous

2-Nov-02 0:49

It seemed you closed debug window. you can make it show again as follow:
1. click Tools/Customize...
2. Select Toolbars tab
3. check debug in Toolbars, it will show immediatly

good luck!

Thanks!

User 66582-Nov-02 0:57

User 6658

2-Nov-02 0:57

You are my hero of the day, thanks! Big Grin | :-D

modified 12-Sep-18 21:01pm.

Image files

Stefan Bolder2-Nov-02 0:15

Stefan Bolder

2-Nov-02 0:15

I have an application that uses a custom image format.
What I am trying to do is make it possible to switch to
'thumbnails' in an explorer window, and have it show the thumbnails,
or when selected show it as a preview in the left pane (just like JPG's
and GIF's do already). How do I go about doing this? Just register the file type? or do I need to fiddle with the .net system.drawing.image encoder class?

Thanks!

Re: Image files

Stefan Bolder2-Nov-02 0:42

Stefan Bolder

2-Nov-02 0:42

Forgot to Add: I REALLY want this custom fileformat to be openable by
the 'windows picture and fax viewer' as well.

Re: Image files

Gary R. Wheeler2-Nov-02 2:16

Gary R. Wheeler

2-Nov-02 2:16

I would guess you need to write a shell namespace extension.

The Complete Idiot's Guide to Writing Namespace Extensions - Part I
By Michael Dunn[^]

Software Zen: delete this;

an idiot question: which key can make me break ' while (cin >> iVal) ' loop when i end up with input?

1-Nov-02 23:51

the code is simple:
vector<int> ivec;
int ival;

while (cin >> ival)
ivec.push_back( ival );

when i run this program, provide input, say, 1 2 3 4 5 6,then, what key should i use to end input?

Thanks for your time!

Re: an idiot question: which key can make me break ' while (cin >> iVal) ' loop when i end up with input?

Dominik Reichl2-Nov-02 2:17

Dominik Reichl

2-Nov-02 2:17

You would have to define an exit code, for example 9999 which must be entered to exit. The code would look like:

vector ivec;
int ival;

cout << "Enter 9999 to break.";

while(cin >> ival)
{
    if(ival == 9999) break;
    ivec.push_back(ival);
}

The Control-C combination always works, but it breaks your complete program, so the code above is much better.

Big Grin | :-D

-Dominik

Re: an idiot question: which key can make me break ' while (cin >> iVal) ' loop when i end up with input?

Gary R. Wheeler2-Nov-02 2:18

Gary R. Wheeler

2-Nov-02 2:18

Homework's a bitch, isn't it?

Software Zen: delete this;

IP packet Capturing

Harvail1-Nov-02 23:26

Harvail

1-Nov-02 23:26

I am new TCP IP Programming
I have captured the IP Packets and HEADER information
But i unable to see data Part of packet can any one tell me how an see
data part of packet or where i can read about it

Re: IP packet Capturing

Gary R. Wheeler2-Nov-02 2:19

Gary R. Wheeler

2-Nov-02 2:19

Try searching the MSDN for "Windows Sockets".

Software Zen: delete this;

statically linking the MFC VC++ samples

Mondrianx1-Nov-02 22:05

Mondrianx

1-Nov-02 22:05

hello all
I have just purchased the Vc++ .net standard edition.

well, if i create a new project with the wizard i can easily change the 'use MFC as a shared DLL' option to 'use static MFC linking' and quickly rebuild my application in order to get one self-contained EXE.

On the other hand, when i load some VC++ samples (the ones supplied with the product ie: commoncontrols sample etc.) they have set the 'use MCF as a shared DLL' option on as a default, so i can build them and get the EXE needing the MFCxx.dll at runtime to work fine.

Now, if in these sample projects I switch the 'use MFC statically linking' option, even if that is correctly displayed in the project settings property page (General page), the resulting built executable still actually shows its dependencies on the MFC DLL (I can see them both using the 'dependency walker' and directly from the EXE size which is smaller than the statically linked one).

I noticed that under the c/c++ preprocessor property page all of these sample projects have always the _AFXDLL flag enabled: but if i cut it (as the wizard generated projects dont' have that flag enabled) the output windows warns that i have to use the /MD option (instead of the /MT one used by the wizard projects). So I use /MD and the project is built and I can launch it, but i wonder if this is really OK, as, as i said, the wizard projects actually use /MT (besides not having the _AFXDLL flag on).

Any info/tips about the above will be greatly appreciated, as i'd like to statically link the sample projects

thanks in adavance

Re: statically linking the MFC VC++ samples

Stephane Rodriguez.2-Nov-02 0:04

Stephane Rodriguez.

2-Nov-02 0:04

Mondrianx wrote:
So I use /MD and the project is built and I can launch it, but i wonder if this is really OK

That's ok. _AFXDLL works in conjunction with /MD (/MDd in debug).

_AFXDLL is to tell you don't statically link with MFCxx.lib, thus MFCxx.dll will be automatically loaded at run-time. But that's not enough since the C run-time (msvcrt) needs to be configured as well, hence the /MD compiler switch.

That's what is usually done when you switch from "use mfc as shared dll" to "use static mfc linking". I guess if it doesn't do exactly that, that's because you've a limited version : there's one product called VC++.NET but there are several license limitations[^]. From what I remember, one of the licenses is just for learning, not for actual app building and ditributions, hence what you see. The fact is, while a given limited edition may not allow you to do several things using the GUI, it is already known that you most of the time can managed to do them anyway using cmdline options, such like what you did!

How low can you go ?
(MS rant)

Question to exit app

dima_t1-Nov-02 21:59

dima_t

1-Nov-02 21:59

Hello all!
I have a little problem in my project (VC++ 6.0).
I want to show user a dialog box with question "exit app or not" when he tries to close application.

Where shoult I write a handle to this event?

Thank you!

Dmitry Timin

Re: Question to exit app

Anatari1-Nov-02 22:55

Anatari

1-Nov-02 22:55

I believe you can do this by overriding the default OnClose() method (WM_CLOSE message)in the main frame window of your application. Then call the CFrameWnd::OnClose() method if the user clicks "OK".

- Anatari

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