C / C++ / MFC

Re: I'm stuck, not sure which direction to go

3-Dec-11 0:03

C++

// read the line of text
WCHAR szAnsiBuffer[1024];
sqlDBFile->getline(szAnsiBuffer, 1024, L'\n');

int jdx = 0;
WCHAR *szBufferLine = new WCHAR[1024];
for (int i = 2; i < 1024; ++i) {
    szBufferLine[jdx] = szAnsiBuffer[i];
    i++;
    jdx++;
}
int iLength = wcslen(szBufferLine);
szBufferLine[iLength] = L'\0';

I'm not sure what you are trying to do here but most of this code is redundant. You have defined your input buffer as WCHAR so the resulting line will be Unicode, There is no need (in fact it's quite dangerous) for the copying character by character. All you need is:

C++

// read the line of text
WCHAR szBufferLine[1024];
sqlDBFile->getline(szBufferLine, 1024, L'\n');

This will leave you with a null terminated array of Unicode characters in szBufferLine, which you can then test, for the L"GO" string, and append to your command.

A couple of other things that you should also do:

1. When you create the pzSQLCommand buffer, is to add a null at the beginning so your wcsncat_s() calls do not trash your memory, thus:

C++

WCHAR *pzSQLCommand = new WCHAR[1024];
*pzSQLCommand = L'\0';

2. Use the proper length setting of your destination buffer (see here[^]) in your wcsncat_s() call thus:

C++

wcsncat_s(pzSQLCommand, 1024, szBufferLine, wcslen(szBufferLine) );

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

jkirkerx3-Dec-11 8:00

jkirkerx

3-Dec-11 8:00

The code is for reading a sql text file, which is exported from sql management. By running the file, you can create a database and populate the data.

It's weird, or I'm reading the results wrong, but on get line, I get the every other character just like the socket program I wrote. I guess I am misinterpreting the data, and it is real unicode, with the 2nd character not programmed.

So one of the original code modules I had was like yours except for the small changes, but I was using ofstream, that kept erasing my file.

The cat works now since placing the null terminator in the creation of the pzSQLCommand, but only cats the first character "y", for "p" must be a special character that halts the copy. I need to walk through it and see.

The getline command returns this. LC 0 LR 0 LE 0 LA 0 LT 0 LE 0 and so on

+		szCommandLine	0x0012f0e0 "ÿþC"	wchar_t [1024]

The first file line, plus rest of command for reference

SQL

CREATE TABLE [dbo].[BatchSettlementIndex] (
  [BatchID] int IDENTITY(1, 1) NOT NULL,
  [BatchName] varchar(80) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
  [BatchDate] datetime NULL,
  [BatchAmount] decimal(10, 2) NULL
)
ON [PRIMARY]
GO

I guess I should move forward 1 move and get the next line working first, since the mechanics are better now. Your wisdom has solidified the design, in which I thank you for. If you think of something let me know.

FYI:
I'm almost done with all the little programs I need for my wizard. This is the next to last piece I need, then I can take all the parts, and compile them into some dll's within the project, and make a new gui to support them.

It's to the point where I have gone far beyond the need of InstallShield 2012, and will try the stock deployment to deploy this program, and let it download the asp.net stuff I wrote.

Nextline

jkirkerx3-Dec-11 8:26

jkirkerx

3-Dec-11 8:26

Well that was fast. The nextline works now. One more to go here, I'll work on the first 2 characters when I get back in 3 hours.

// Load the SQL Server Commands
    std::wifstream *sqlDBFile = new std::wifstream;
    sqlDBFile->open(szFilePath, std::wifstream::in);

    // if the file stream opened
    if (sqlDBFile->is_open() ) {

        // While file stream is in memory
        while (sqlDBFile->good() ) {
            // Make a temp sql command buffer
            WCHAR *pzSQLCommand = new WCHAR[1024];
            *pzSQLCommand = L'\0';

            while ( sqlDBFile->get() ) {
                // read the line of text
                WCHAR szCommandLine[1024];
                sqlDBFile->getline(szCommandLine, 1024, L'\n');


                // if text != GO, add to buffer
                if (szCommandLine != L"GO") {
                    wcsncat_s(pzSQLCommand, 1024, szCommandLine, wcslen(szCommandLine) );
                    break;
                }
                else {
                    // if text = GO, terminate the buffer and execute the buffered command
                    hr = pICommandText->SetCommandText( DBGUID_DBSQL, pzSQLCommand );
                    hr = pICommandText->QueryInterface( IID_ICommandProperties, ( void ** ) &pICommandProperties );
                    hr = pICommandText->Execute( NULL, IID_IRowset, NULL, &cRowsAffected, ( IUnknown ** ) &pIRowset );

                }
            }
        }

        // close the sql command file
        sqlDBFile->close();
        sqlDBFile = NULL;
    }

Re: Nextline

Richard MacCutchan3-Dec-11 9:13

i can't load dll builded in debug unicode,what's difference between 'debug' and 'debug unicode'?

3-Dec-11 9:13

You got it. Remember WCHAR is a 16 bit character set, many of which map 1:1 with the ASCII set padded with a zero byte, which is why it looks like an ASCII character followed by a zero.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Member 77984732-Dec-11 5:06

Member 7798473

2-Dec-11 5:06

i've some code written as a dll in C++ in Visual Studio 2008. I've to be able to debug it. But i can't load dll in test exe. There isn't any problem on my test exe because when i try to load another dll there isn't any problem. Dll that given to me builded in debug unicode. Is it may be the cause of the problem? And how can i convert it to just debug mode? i really need your help., Thanks in advance.

Re: i can't load dll builded in debug unicode,what's difference between 'debug' and 'debug unicode'?

JackDingler2-Dec-11 5:19

JackDingler

2-Dec-11 5:19

The debug and debug unicode project settings load different versions of the Microsoft MFC libraries and DLLs.

All of your MFC based projects, need to be compiled and built with the same project settings.

Re: i can't load dll builded in debug unicode,what's difference between 'debug' and 'debug unicode'?

Erudite_Eric2-Dec-11 5:44

Erudite_Eric

2-Dec-11 5:44

So, as the other poster said, rebuld your test exe with unicode debug set. (Hope you used the _T before all strings to enable the project to be built both ways.)

==============================

Nothing to say.

Re: i can't load dll builded in debug unicode,what's difference between 'debug' and 'debug unicode'?

Richard MacCutchan2-Dec-11 6:20

class object as parameter of Template Function

2-Dec-11 6:20

It makes no difference how the DLL is built as to whether you can use it or not, you just have to use the correct calling sequences. It would be better if you explained exactly what you are doing or trying to do, show some code if it will help, and what results you see.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

002comp2-Dec-11 0:29

002comp

2-Dec-11 0:29

Hello Friends

I am creating a Function template Whose declaration is like this

C++

template <class T>
void Test(string name,T value,bool exist)

Defination 
template<class T> void sample::Test(string name,T value,bool Exist)

Now,i am passing Color class object to fn Test,like this

Color c;
Test<Color>("name",c,true);

And Its Giving Linking error that
error LNK2019: unresolved external symbol "public: void __thiscall sample::Test<class color="">

Any Ideas?
Regards
Yogesh

CPallini2-Dec-11 0:43

2-Dec-11 0:43

Where did you put such statements?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

002comp2-Dec-11 0:50

002comp

2-Dec-11 0:50

I put these statements in my program.
I provide the overview of what i am Doing.

Regards
Yogesh

CPallini2-Dec-11 0:53

2-Dec-11 0:53

'my program' is a bit vague. Do you know, for instance, that template method implementations should go into header files (not into source files)?

image processing toolkits | batch image processing

C^hris L^osinger2-Dec-11 1:29

C^hris L^osinger

2-Dec-11 1:29

(unless you are only going to use that template inside that one source file)

CPallini2-Dec-11 1:32

2-Dec-11 1:32

Good point. Thumbs Up | :thumbsup:

002comp2-Dec-11 1:30

002comp

2-Dec-11 1:30

I was putting separate in header and cpp files.

Now,i put its definition in header itself.No Errors.

Will u please Explain Why it is so ?

Thanks & Regards
Yogesh

CPallini2-Dec-11 1:44

2-Dec-11 1:44

See, for instance: "[35.12] Why can't I separate the definition of my templates class from its declaration and put it inside a .cpp file?"
[^].

bad ON_EN_CHANGE management

Addy Tas4-Dec-11 10:45

Addy Tas

4-Dec-11 10:45

Hi, good resource!

Cheers, AT

Cogito ergo sum

waltermei1-Dec-11 22:49

waltermei

1-Dec-11 22:49

good morning

i'm using VC++ in visual studio 2010

in my code i made a dialog with edit controls and an associated ON_EN_CHANGE function

i noticed this function (the OnChangeXXX associated with ON_EN_CHANGE handler) is called before dialog is visualized and the following error "Debug Assertion Failed!" appares

i can avoid it using only using a flag cleared at initialization and setted at the end of OnInitDialog, checked at the begin of my OnChangeXXX funcions, like this

if (!m_xIsUsable) return;

to ignore the function if dialog is not yet displayed

is this the only way to avoid the problem?

thanks in advance and regards

Re: bad ON_EN_CHANGE management

Code-o-mat2-Dec-11 0:38

Code-o-mat

2-Dec-11 0:38

Does any of your edit fields have a spin button with UDS_AUTOBUDDY/UDS_SETBUDDYINT style attached to it? I ran into a similar problem a few days ago and -at least i think- the edit change is triggered by the spin control when it attaches itself to the edit and sets its content and since this happens at creation time you get the message before your DoDataExchange has ran. I avoided this by simply checking the m_hWnd member of the CEdit to see if it has been attached to the dialog's control or not. Could this be your problem also?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Re: bad ON_EN_CHANGE management

waltermei2-Dec-11 1:41

waltermei

2-Dec-11 1:41

hi Code-o-mat

you are right. i use a spin button associated

so i understand why not all my edit controls suffer about this problem. it could be nice to understand why there is not a latch in message dispatcher to block these kind of messages before window displaying is not complete

thank you very much for your suggestion Thumbs Up | :thumbsup:

Re: bad ON_EN_CHANGE management

Code-o-mat2-Dec-11 3:12

Code-o-mat

2-Dec-11 3:12

I supose they either didn't think of this case OR since it is relatively easy to overcome, they didn't bother... anyways, yourwelcome. Smile | :)

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Call Win32 dll from COM dll

MrKBA1-Dec-11 22:39

MrKBA

1-Dec-11 22:39

Hi
I have an application Exe that call a COM dll.
I have to Load an other Win32 dll(named "Win32_dll" from this COM dll.
LoadLibrary(Win32_dll) fail always.

HINSTANCE hLib = ::LoadLibrary(_T(_DLL_NAME_));
always hLib = NULL;

- I put this dll in the same directory of COM dll BUT always fail.
- I put it in the directory of EXE and it success.

So problem is how to Load the Win32 dll from the COM dll attached to an other Exe application ?

Re: Call Win32 dll from COM dll

Richard MacCutchan1-Dec-11 23:00