Re: Database exception try/catch block - C / C++ / MFC Discussion Boards

priyank_ldce8-Mar-07 3:41

8-Mar-07 3:41

Hi all,

I am making one win32 application using VC++.NET. I have one global array of char defined as char * picArray; And it is initialized in one of the function of application picArray = new char[Height*Width]; But when I am trying to use this array in another function I am not getting data values. Can I know what is the solution for this?

Thanks in advance,
Priyank.

Re: global dynamic array.

Like2Byte8-Mar-07 3:47

Like2Byte

8-Mar-07 3:47

Have you tried the Scope Resolution Operator '::'?

Re: global dynamic array.

Cedric Moonen8-Mar-07 3:52

Cedric Moonen

8-Mar-07 3:52

priyank_ldce wrote:
But when I am trying to use this array in another function I am not getting data values

If you don't fill the array with values, it's logical that you cannot get data value.

Can you explain exactly what you are doing, what the problem is and what you expect ?

Cédric Moonen
Software developer

Charting control [v1.1]

Re: global dynamic array.

prasad_som8-Mar-07 3:57

prasad_som

8-Mar-07 3:57

priyank_ldce wrote:
picArray = new char[Height*Width];

Are you its assigned value somewhere in your application, bfore using it ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: global dynamic array.

vibindia8-Mar-07 5:10

vibindia

8-Mar-07 5:10

hi
Is ur another function where u r getting the value is defined in same file ,where u are declaring the char *picArray as global.

The more globas u use,will create more problem when the application grows big.
So pls make try to avoid it

VIBIN

"Fool's run away,where angle's fear to tread"

Database exception try/catch block

Like2Byte8-Mar-07 3:31

Like2Byte

8-Mar-07 3:31

Hi, I'm fixing someone's code and I came across this:

<br />
BOOL CDatapointSet::Open(UINT nOpenType, LPCTSTR lpszSql, DWORD dwOptions) <br />
{<br />
	// TODO: Add your specialized code here and/or call the base class<br />
	BOOL rtn;<br />
	TRY<br />
	{<br />
		rtn = CRecordset::Open(nOpenType, lpszSql, dwOptions);<br />
	}<br />
	CATCH(CException, e)<br />
	{<br />
		m_DB2 = true;<br />
		m_nFields = 30;<br />
		rtn = CRecordset::Open(nOpenType, lpszSql, dwOptions);<br />
	}<br />
	END_CATCH<br />
	return rtn;<br />
}<br />

Now, I'm thinking it's a candidate for theDailyWTF; but, I'm not all that familiar with writing database apps as I'm more of an embedded kind of guy.

Is this normal?

Re: Database exception try/catch block

David Crow8-Mar-07 4:20

David Crow

8-Mar-07 4:20

What does familiarity with database apps have to do with it? Assigning values to m_DB2 and m_nFields has no bearing on CRecordset::Open()'s ability to open a record set.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Database exception try/catch block

Like2Byte8-Mar-07 4:26

Like2Byte

8-Mar-07 4:26

This is what I'm screaming! Poke tongue | ;-P

That and the fact that the OP(rogrammer) code throws an exception when the first Open is encountered. (The table it's looking for does NOT exist.

Then, in the CATCH block the OP does the exact same thing that caused the exception in the first place without changing a thing.

Like I said, a candidate for theDailyWTF.

I didn't think I was off-base by much. Thanks for your post. Smile | :)

Re: Database exception try/catch block

Mark Salsbery8-Mar-07 6:19

Mark Salsbery

8-Mar-07 6:19

Nice!

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

using MFC in C#

kkadir8-Mar-07 3:07

kkadir

8-Mar-07 3:07

Hello everyone,

I would like to ask if it is possible to use an MFC application as a part of a C# Windows Form project? If yes how is this possible?

Thanks and best regards.

.:: Something is Wrong ::.

Re: using MFC in C#

prasad_som8-Mar-07 3:52

prasad_som

8-Mar-07 3:52

pashje wrote:
to use an MFC application as a part of a C# Windows Form project

Do you mean using MFC classes in C# project ? Answer is No.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: using MFC in C#

led mike8-Mar-07 6:44

led mike

8-Mar-07 6:44

prasad_som wrote:
Do you mean using MFC classes in C# project ? Answer is No.

Depends on your definition of "use". If you Wrap the MFC class in a managed class using C++/CLI you could in effect "use" the MFC class from C#.

led mike

Re: using MFC in C#

Hamid_RT8-Mar-07 6:43

Hamid_RT

8-Mar-07 6:43

What does mean "an MFC application as a part of a C# Windows Form project" can you be more specific

WhiteSky

Re: using MFC in C#

kkadir8-Mar-07 7:09

kkadir

8-Mar-07 7:09

Well, what I am trying to do is write some OpenGL with MFC and then wish to use this in a Windows Form as a custom control. It seems weird but I just try to benefit from the MFC performance and .NET Forms usability.

.:: Something is Wrong ::.

Export String in .txt file

Shah Satish8-Mar-07 2:22

Shah Satish

8-Mar-07 2:22

hi !!!

Anybody know how can i export my text from Autocad (its string ) to .txt file..+I have no idea about it..If anybody have some idea or Code for export String into .txt file then please help me out.

Thanking you.

Shah

Re: Export String in .txt file

toxcct8-Mar-07 2:26

toxcct

8-Mar-07 2:26

where is your problem exactly ?? getting the strings, or writing the file with string you got previously ?

[VisualCalc][Binary Guide updated! ][CommDialogs new! ] | [Forums Guidelines]

Re: Export String in .txt file

prasad_som8-Mar-07 2:54

prasad_som

8-Mar-07 2:54

Shah Satish wrote:
how can i export my text from Autocad (its string ) to .txt file

There should be some functions available in AutoCad SDK for sure.

You can get better answers from Autocad forums I guess.

Prasad
Notifier using ATL | Operator new[],delete[][^]

getting Linking Error while compling Simple Device Manager

VC_RYK8-Mar-07 2:19

VC_RYK

8-Mar-07 2:19

I have downloaded some sample application "Simple Device Manager" from link
http://www.codeproject.com/system/DevMgr.asp

and i am compiling this sample on VC 2005 but getting some linking Error like

unresolved external symbol @_RTC_CheckStackVars

and i am trying to find this "RTC_CheckStackVars" function but no where i found and i have DDK 2003 installed on my machine.
please do help me out..

Thanks in advancd
RYK

Re: getting Linking Error while compling Simple Device Manager

prasad_som8-Mar-07 4:19

prasad_som

8-Mar-07 4:19

After searched on net, I find One[^] reference. Check ,if it has something to do with your problem.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: getting Linking Error while compling Simple Device Manager

Mark Salsbery8-Mar-07 6:25

Mark Salsbery

8-Mar-07 6:25

RTC = RunTime Check

You may need to link to the debug CRT or disable runtime checks.

Look in the online help for RTC compiler option for more details.

Mark

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

Re: getting Linking Error while compling Simple Device Manager

VC_RYK9-Mar-07 0:47

VC_RYK

9-Mar-07 0:47

Thanks buddy.
Now it is working..

copy structures to buffer

Zapacila8-Mar-07 2:03

Zapacila

8-Mar-07 2:03

Hi
I have this BITMAPINFO and BITMAPHEADERFILE structures

BITMAPINFO *Bitmap = NULL; // lets say that they are initialized corectly and with data in it
BITMAPFILEHEADER bfh;
int Lenght; // the imagize size

char * buff=new char[sizeof(Bitmap)+sizeof(bfh)]; create a buffer
memcpy(buff, &bfh, sizeof(bfh)); // copy bitmap header into it
memcpy(buff+sizeof(bfh), Bitmap, Length); // then copy the bitmapinfo into it and //error

what do i do wrong..
i want to but the bits of those structures into a buffer : thats what he does here:

File.Write(&bfh,sizeof(bfh));
File.Write(Bitmap,Length);
File.Close();

and workd greath..

i assume it similar only that he copies them into HDD

anybody? thanks

Re: copy structures to buffer

krmed8-Mar-07 2:48

krmed

8-Mar-07 2:48

One problem I see at first glance is:

char * buff=new char[sizeof(Bitmap)+sizeof(bfh)]; create a buffer

sizeof(Bitmap) is going to give 4 bytes, since Bitmap is a pointer.

You need to use

char * buff=new char[length+sizeof(bfh)]; create a buffer

just like you have in your memcpy. (This is assuming, of course, that length is properly set before you new the buff.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: copy structures to buffer

David Crow8-Mar-07 3:02

David Crow

8-Mar-07 3:02

Rather than write buff to the file, why not write bfh and Bitmap directly?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: copy structures to buffer

Zapacila8-Mar-07 4:05

Zapacila

8-Mar-07 4:05

if i write it to hdd it will slow thngs down

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