string problem??? - C / C++ / MFC Discussion Boards

zinc_z10-Feb-06 8:17

10-Feb-06 8:17

Hi ,

I am having problem when I assign a string more than 255 characters to a CRecordset memeber like

(m_Result is a CString)
Res->m_Result=str1; (str1 is more than 255 characters)
UpDate();

and I get a exception "Debug Assertion Failed , DBFRX line 287 ".

Is there any other way of setting string more than 255 characters using CRecordset->Update() ???

Thanks,
ZINC

Re: CRecordset ? DoFieldExchange ??

David Crow10-Feb-06 9:26

David Crow

10-Feb-06 9:26

What type/size of field in your table is m_Result tied to?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: CRecordset ? DoFieldExchange ??

zinc_z11-Feb-06 15:05

zinc_z

11-Feb-06 15:05

its a ACCESS table and field is of ntext type

Re: CRecordset ? DoFieldExchange ??

David Crow13-Feb-06 8:17

David Crow

13-Feb-06 8:17

zinc_z wrote:
...and field is of ntext type

Not sure how 'ntext' compares to 'text' but how large is the field?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: CRecordset ? DoFieldExchange ??

zinc_z15-Feb-06 3:26

zinc_z

15-Feb-06 3:26

its of CString type

Re: CRecordset ? DoFieldExchange ??

David Crow15-Feb-06 3:31

David Crow

15-Feb-06 3:31

You have already indicated that m_Result is a CString object. My question was about the field in the database.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: CRecordset ? DoFieldExchange ??

zinc_z15-Feb-06 22:48

zinc_z

15-Feb-06 22:48

m_Result is bound to of ntext(length 16) type field in SQL Server . I have tried to change the field to varchar (length 700) but no diff. I still got the same exception.

any other sugestions ?

Regards,
ZINC

string problem???

#hackC++10-Feb-06 7:50

#hackC++

10-Feb-06 7:50

When i enter the words rents and will the program will say "will is larger than rents" which is wrong. I can't figure out why it's doing that. I supplied the code below (might have forgot little things like ; or ,). If anyone can tell me what is wrong it would help me a lot. I'm new to C++ programming.

#include <iostream>
#include <string>
using namespace std;

int main()
{
string a, b;

cout << "Enter two words." << endl;
cin >> a >> b;
cin.ignore(10,'\n');

string small, big;

if (a < b)
{
small = a;
big = b;
}

if (a > b)
{
small = b;
big = a;
}

if (a.size() == b.size() && a != b))
{
cout << "Same size, but different string" << endl;
cin.get();
return 0;
}

if (a == b)
{
cout << "Their the same string" << endl;
cin.get();
return 0;
}

cout << big << " is larger than " << small << endl;
cin.get();
return 0;
}

-- modified at 13:53 Friday 10th February, 2006

Re: string problem???

Maximilien10-Feb-06 8:40

Maximilien

10-Feb-06 8:40

will is larger than rents ...

the < or > compare lexicographically; so W is bigger than R.

anyway, in my case, my will will be bigger than my rent ... :->

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: string problem???

#hackC++10-Feb-06 8:45

#hackC++

10-Feb-06 8:45

Would <= and >= fix the problem? If not what would I have to put there?

Re: string problem???

RobJones10-Feb-06 8:54

RobJones

10-Feb-06 8:54

if(a.size() > b.size())
{
....
}

if(a.size() < b.size())
{
....
}

if you are compairing the lengths.

Whoever said nothing's impossible never tried slamming a revolving door!

Re: string problem???

Maximilien10-Feb-06 9:12

Maximilien

10-Feb-06 9:12

no it will not.

R is still smaller ( or equal ) than W, whatever the length of the rest of the strings.

what are you trying to compare ? the string length ? or the lexical order ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: string problem???

Demonware66610-Feb-06 15:16

Demonware666

10-Feb-06 15:16

I once had a similiar problem so I used the strcmp function. Check out digitalmars.com for the details on dealing with strings, its a great site. Got to the runtime library part.

ALL YOUR BASE ARE BELONG TO MICROSOFT!

Demonware Studios Leader

Interactive SQL Tool (using ODBC) question.

Blakiston10-Feb-06 7:31

Blakiston

10-Feb-06 7:31

I downloaded ISQLMFC_src.zip source code from topic "Interactive SQL Tool (using ODBC)". I used Microsoft Visual Studio .Net 2003 to build it, but I got the following error message: "error C2065: 'm_pchData' : undeclared identifier". What did I miss? Please help me out?

Thank you.

Blakiston

VB macros

skk64302n10-Feb-06 7:29

skk64302n

10-Feb-06 7:29

Hi,

I wanted to learn CommBasic language.... or any language...
where i can write macros....

I decided to learn C, C++... will this be help to me to write
macro on VB flatform.....

SKK

Error in code

zahid_ash10-Feb-06 6:50

zahid_ash

10-Feb-06 6:50

There ia an arror in the code below , but i am unable to fine some has provided me to find , Please mention it , Thanks

MS_PACKET DataPacket;
memset(&DataPacket,0,sizeof(MS_PACKET));
DataPacket.msHeader.dPacketType = ACM_MSG_SEND_PAIR_ORDER;

strcpy( DataPacket.acmSendPairOrder.m_szAccount ,
szCurrentLogin );
strcpy( DataPacket.acmSendPairOrder.m_szSymbolBuySide ,
pPair->BaseSymbol.szSymbol );
strcpy( DataPacket.acmSendPairOrder.m_szSymbolSellSide ,
pPair->DependentSymbol.szSymbol );

DataPacket.acmSendPairOrder.m_nSharesBuySide =
pPair->BaseSymbol.iNeededShares;
DataPacket.acmSendPairOrder.m_nSharesSellSide =
pPair->DependentSymbol.iNeededShares;
DataPacket.acmSendPairOrder.m_cSideBuySide = 'B';
DataPacket.acmSendPairOrder.m_cSideSellSide = 'S';
DataPacket.acmSendPairOrder.m_nPairID = pPair->nACMPairID;

static int nOrderCounter = 0;
DataPacket.acmSendPairOrder.m_nMPairOrderID = nOrderCounter++;
m_pMTLinkSocket->Send((BYTE*)&DataPacket,sizeof(MS_PACKET));

Regards.

Re: Error in code

David Crow10-Feb-06 9:24

David Crow

10-Feb-06 9:24

zahid_ash wrote:

There ia an arror in the code below

Good luck in finding it, especially since you did not indicate whether it was a compiler, linker, or runtime error.

You seem to have narrowed it down to a small section of code. Why can't you single-step through it to find which statement is in error?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Looking for solid C+Tree or C*-Tree source

Joe Woodbury10-Feb-06 6:27

Joe Woodbury

10-Feb-06 6:27

I am looking for some solid, unencumbered, source for a C+Tree or, preferably, C*Tree.

Note the words "unecumbered"--at most it must have a zlib type license, it cannot have any requirement to distribute the source; my client will simply not allow it.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Looking for solid C+Tree or C*-Tree source

Jim Crafton10-Feb-06 6:33

Jim Crafton

10-Feb-06 6:33

You mean a tree container class, something that's compatible with STL? Or a tree view control?
I was looking for tree container class myself, but didn't find much that I liked. There's one here on CP that looks quite nice, but it's LGPL so that's a no go, for me.

¡El diablo está en mis pantalones! ¡Mire, mire!

Real Mentats use only 100% pure, unfooled around with Sapho Juice(tm)!

SELECT * FROM User WHERE Clue > 0
0 rows returned

Save an Orange - Use the VCF!

Re: Looking for solid C+Tree or C*-Tree source

Joe Woodbury10-Feb-06 6:39

Joe Woodbury

10-Feb-06 6:39

Just a C+Tree with no STL (if someone has put STL on top, that's fine.) I will have to use disk (both to persist the tree and because of memory issues) so a plain C-Tree is out as is STL or MFC classes.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Looking for solid C+Tree or C*-Tree source

EXTEIDE10-Feb-06 6:40

EXTEIDE

10-Feb-06 6:40

How about looking for it in here[^]?
But I wonder whether there is a non-license component that you want.

Enjoy Rose | [Rose]

Anderson Sheen
Reduce a time to develop your environment. It's a free!
http://www.exteide.com

Re: Looking for solid C+Tree or C*-Tree source

Joe Woodbury10-Feb-06 6:47

Joe Woodbury

10-Feb-06 6:47

Uh, not to be too sarcastic, but I'm looking for C+Tree or C*Tree source code not a tree control. If you don't know the difference, don't respond.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Looking for solid C+Tree or C*-Tree source

EXTEIDE10-Feb-06 7:05

EXTEIDE

10-Feb-06 7:05

I just suggested category collection. but I didn't look for it there. Sorry, it'm my mistake.
But I think it's not good to say like you by reason that you couldn't found it in my reference.
My will was giving help to you although it was not help to you.

Anderson Sheen
Reduce a time to develop your environment. It's a free!
http://www.exteide.com

Re: Looking for solid C+Tree or C*-Tree source

Jörgen Sigvardsson10-Feb-06 12:21

Jörgen Sigvardsson

10-Feb-06 12:21

If you do find a free such implementation, which is not an integrated part of a complex system such as a DBMS, please let me know. This is the kind of stuff you normally pay big bucks for. Smile | :)

Help With VC++ SOcket Programming using MFCs

alienattack10-Feb-06 6:13

alienattack

10-Feb-06 6:13

Hello everyone,
I am a beginner in socket programming and would like anyone to suggest some basic code-one for the client and another for the server,written in VC++ using MFC's and using the CSocket class,not CAsyncSocket.,or if anyone could suggest a link where i could find some place to start off from,i'd be grateful.Thanks

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