C / C++ / MFC

Re: CRecordset Record Updating(Debug Assertion Failure) problem

25-Aug-04 5:59

The CRecordset::CanUpdate asserts on this and If the recordset is open, and since u didnt open it it gave u the assertion, thus my suggestion to Check CRecordset::Open

afxdb.inl:
----------
ASSERT_VALID(this);
ASSERT(IsOpen());

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

raed25-Aug-04 20:38

raed

25-Aug-04 20:38

ok,i check IsOpen() for recordset and return that the recordset is not Open , but when i open the record set like this:

CDatabase database;
database.OpenEx("DSN=HomeDSN;uid=sa;pwd=");
CRecordset record(&database);
record.Open(AFX_DB_USE_DEFAULT_TYPE,"SELECT * FROM Clients",CRecordset::none);

...
..
it works fine

but when do this:-

record.Open(AFX_DB_USE_DEFAULT_TYPE,"UPDATE Clients SET ClientName = 'Sam' WHERE ClientID ='00014'",CRecordset::none);//Assertion occured

WHY?

Thanks

how to move the event handler from main view

hyling25-Aug-04 5:43

hyling

25-Aug-04 5:43

Hi,

I've got a single document application that has a CFormView for the main window, then inside the CFormView I have a CTabControl that uses a custom CDialog class for each tab. I would like to move the event handling from the main CFormView class to the CDialog class for each tab. When I add a event handler to the dialog class it never gets called. Is this how you would code a tab control and why doesn't this work?

Thanks
Hua-Ying

INI Files

si_6925-Aug-04 5:30

si_69

25-Aug-04 5:30

Hi All

i have an application in which i use a ini file to store settings,
the user reads and writes to it

i use WritePrivateProfileString to write to the ini file
and GetPrivateProfileString to read from it

my problem is, is a lot of people who use my application do not
have admin rights..so cant write back to to the ini file

does anyone know a way round this ??

ive thought about using the registry, HKEY LOCAL MACHINE you need admin
rights for
I cant use HKEY CURRENT USER as there may be many users using my app
all who share the same settings,

Any one any ideas ???? Confused | :confused:

ta

si

Re: INI Files

David Crow25-Aug-04 5:45

David Crow

25-Aug-04 5:45

si_69 wrote:
a lot of people who use my application do not
have admin rights..so cant write back to to the ini file

In what folder does the .ini file reside?

si_69 wrote:
I cant use HKEY CURRENT USER as there may be many users using my app
all who share the same settings,

That's what that hive is for. If three people use the same machine, they each need their own settings saved to the HKCU hive. If there are settings that need to be in effect regardless of who is using the machine, then those go in the HKLM hive.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: INI Files

si_6925-Aug-04 22:40

si_69

25-Aug-04 22:40

DavidCrow wrote:
In what folder does the .ini file reside?

its stored in the application folder off program files

c:\program files\myapp

does that make a difference ?

DavidCrow wrote:
If there are settings that need to be in effect regardless of who is using the machine, then those go in the HKLM hive

the problem with that is you cant write back to HKLM in non administative mode and the
user doesnt have adminostrator rights

Re: INI Files

David Crow26-Aug-04 3:01

David Crow

26-Aug-04 3:01

si_69 wrote:
its stored in the application folder off program files

c:\program files\myapp

does that make a difference ?

Only if the user of the application does not have 'write' access to that folder, which they probably shouldn't. In reality, the INI file(s) should be stored in the C:\Documents and Settings\<username> folder, or a subfolder thereof. This is a folder that users will have 'write' access to.

si_69 wrote:
the problem with that is you cant write back to HKLM in non administative mode and the
user doesnt have adminostrator rights

Normally there's no need. When I install the software on a PC, I do so as the domain administrator so that application-wide settings are stored in the HKLM hive of the registry. When I configure the software, I do so as the person that will eventually be using it so that user-specific settings are stored in the HKCU hive. Make sense?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

WinSock2

Micie25-Aug-04 5:20

Micie

25-Aug-04 5:20

I need a VERY GOOD tutorial with many examples of ws2 use.
Post links here, plz. Roll eyes | :rolleyes:

I read several, but most of them sux. Authors only showing struct and use of the functions. I know what is doing accept() func, but I don't know why should I use it =\ the same is with bind() etc.
My problem is: I have a client of the game. I want to connect my application with this - send and recv packets.
Does any one of you know how to help me?

_________<br />
I'm made in C++... and I'm proud of it!

Tom Wright25-Aug-04 5:33

Tom Wright

25-Aug-04 5:33

There's a really good book called "Network Programming with Windows Sockets" that taught me everything. Also with the help from tutorials on codeproject.

Tom Wright
tawright915@yahoo.com

Micie25-Aug-04 5:36

Micie

25-Aug-04 5:36

Do u have a link to it?

_________<br />
I'm made in C++... and I'm proud of it!

Tom Wright25-Aug-04 5:46

Tom Wright

25-Aug-04 5:46

Look on Amazon. Also take a look at Win32 Network Programming. Very good book. Can find this on Amazon.com too.

Tom Wright
tawright915@yahoo.com

AT command? ===> read sms method

palbano25-Aug-04 19:32

palbano

25-Aug-04 19:32

http://Sockets.com[^]

Watch out! I'm a CPian on the edge!
I have a new Gold rating and I'm not afraid to use it!

-pete

Adrian Soon25-Aug-04 5:11

25-Aug-04 5:11

halo...
do anyone know wat does the it return U when U wan to use the read sms AT COMMAND?

I have no idea wat to send so I send this... to the mobile phone..
p->Send("AT+CMGL=4");

wat will I have in return.....?

wat Command should I send if I wan to know the amount of read and unread msg I have?

jmkhael25-Aug-04 5:24

25-Aug-04 5:24

What is p?
What is the mobile type?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Adrian Soon26-Aug-04 0:55

26-Aug-04 0:55

p is an object.... which have a method to send AT COMMAND TO my mobile phone...

Now wat I wan most is to know how to read a Message and how many message are there in the phone... so I was able to read the message...

I Found the AT COMMAND in the from the NokiaForum... but how do i do it? do U have any sample? or any web have print screen to show me how to do it?

jmkhael26-Aug-04 1:00

26-Aug-04 1:00

Check the Nokia SDK, it has sample to do that and more, ull have full control over the phone.
Search for Nokia PC Connectivity SDK

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Adrian Soon26-Aug-04 2:06

26-Aug-04 2:06

so U tink is it possible I can read my msg in my pda? via IrDA port?

Adrian Soon28-Aug-04 5:18

intrinsic _InterlockedIncrement

28-Aug-04 5:18

I try all the AT-COMMAND but my mobile phone only return me "OK"...
y is it so?
my phone do have message in it...
wat result should it show?
anyone know how to solve this problem?
my application is connecting my mobile phone wit my PDA via IrDA.... to see sms in my inbox... do U all know wat Command is able to work or any web tat do the help?

peterchen25-Aug-04 5:10

peterchen

25-Aug-04 5:10

Just found the following on a mailing list:

extern "C" long_type __cdecl _InterlockedIncrement(long volatile *);
#pragma intrinsic(_InterlockedIncrement)

which gives you an intrinsic increment function (expanding to lock xadd)
(same goes for decrement, of course)

Now this is documented in the current MSDN, and it does work with VC6 but isn't documented in the old MSDN.

Any implications of using it?

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

jmkhael25-Aug-04 5:21

25-Aug-04 5:21

In fact this is what the InterlockedIncrement expands into.

InterlockedIncrement
:77E737D1 8B4C2404 mov ecx, dword ptr [esp+04]

:77E737D5 B801000000 mov eax, 00000001
:77E737DA 90 nop
:77E737DB 0FC101 lock xadd dword ptr [ecx], eax
:77E737DE 40 inc eax
:77E737DF C20400 ret 0004

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

peterchen25-Aug-04 6:43

peterchen

25-Aug-04 6:43

Well, the core will be lock xadd [ptr to long value], [register containing 1], the rest depending on the context and usrrounding optimizations.

(I'm talking about _InterlockedIncrement, not InterlockedIncrement, as for the latter there seems no intrinsic version)

Question, remains: Is the intrinsic version _InterlockedIncrement "documented" or at least "known to be safe" for use with VC6?

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

jmkhael25-Aug-04 6:59

25-Aug-04 6:59

Maybe you didnt get me right, but my aim was to tell you that the InterlockedIncrement in kernel32.dll if you decompile it, or follow it through a debugger, will have the assembly in my previous post. Which is "the same" as the intrinsic version.

Whether or not this is safe, or stable has nothing to do with it. If intel and microsoft decided to change the way the LOCK on the memory system bus happen your application would suffer. But that is highly unprobable.

What i would like to understand, is, what gain you get if you use the intrinsic form?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;