C / C++ / MFC

Re: How to decide a string is in RTF or Plain Text

25-Aug-08 20:59

Does the RTF Specification[^] help?

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

CodingLover25-Aug-08 22:23

CodingLover

25-Aug-08 22:23

Thanks for the reply.

I go through the doc you send. But there is no direct way, I mean any windows API or something. Do you know such a way, something like IsTextUnicode used to identify UNICODE and ASCII?

I appreciate your help all the time...
CodingLover Smile | :)

Re: How to decide a string is in RTF or Plain Text

Rajesh R Subramanian25-Aug-08 23:28

problem using CDaoDatabase

25-Aug-08 23:28

I don't know of something like IsTextRTF(). But you can make one yourself. For instance, the specifications say that the RTF should have a Header ^, without which, the text won't be RTF.

You can search for articles on an RTF reader application and know how the header is parsed.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Prasann Mayekar25-Aug-08 20:43

Prasann Mayekar

25-Aug-08 20:43

i am using CDaoDatabase to connect to ms-access database and trying to insert records in some table.

it works fine when used through a gui thread (main thread) any number of times, but the application crashes when i try to insert a record via a worker thread after i have inserted in main thread, although all the insert queries are same and work at different times.

code snippet:
CDaoDatabase daodb;
daodb.open("D:\\test.mdb");
if(daodb.IsOpen())
{
daodb.Execute(strQuery);
daodb.close();
}

when i try to debug it gives access violation when it tries to open the database.

thanks

Re: problem using CDaoDatabase

Varghese Paul M25-Aug-08 21:30

Varghese Paul M

25-Aug-08 21:30

Hi,
To my knowledge, none of the MFC DAO classes are thread safe. You are not supposed to access DAO objects from threads other than the main GUI thread. You have to use "SendMessage" to the main APP window from the worker threads to access DAO objects in the main GUI thread.

The best alternative I would suggest is ADO which is thread-safe.

But you can try the following approaches.

1. Instead of using a worker thread, create a user interface thread by deriving a class from CWinThread and call AfxDaoInit() function from the override InitInstance method before you start using DAO objects.

or

2. Try the worker thread itself. Call AfxDaoInit() method before you start using DAO objects.

cheers
Varghese Paul

WriteFile with Vista

john563225-Aug-08 19:41

john5632

25-Aug-08 19:41

Hi,
I am again asking the same question because yesterday I was unable to login. Questio is:

I am filling some cluster of Harddisk with some data, It is running fine with all other operating system except Windows Vista.
WriteFile() function is getting fail in Vista.

I am getting errro "5-Access Denied".

Can anybody help me?

SandipG 25-Aug-08 20:03

SandipG

25-Aug-08 20:03

I read many similar problems on vista on CP and most of these file related problems had following answer.

"You require Administrator access".

Regards,
Sandip.

Rajesh R Subramanian25-Aug-08 20:11

25-Aug-08 20:11

The program must be "escalated". See:

UAC - The definitive guide[^]

Riding the Vista UAC elevator[^]

Also, search CodeProject for articles on "UAC".

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Peter Weyzen26-Aug-08 0:37

Peter Weyzen

26-Aug-08 0:37

Vista is a whole new world when it comes to access rights. Back in XP and older OS you almost always could write anywhere... But, under Vista you are much more restricted!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<a href="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</a>

Mark Salsbery26-Aug-08 5:39

26-Aug-08 5:39

Whole new world? Hardly.

These are the same rules that started with Windows 2000.

Old world rules enforced Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

MFC validation

samrw25-Aug-08 19:32

samrw

25-Aug-08 19:32

i want to add country validation in my dialog EDITBOX

Rajesh R Subramanian25-Aug-08 19:33

25-Aug-08 19:33

Go for it.

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

ThatsAlok25-Aug-08 21:04

ThatsAlok

25-Aug-08 21:04

yeap yeapp yeaaapp go for it!!!!!!!!!!!!!!!!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/xml>

Mark Salsbery26-Aug-08 5:41

26-Aug-08 5:41

We can't allow this to happen!

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

samrw26-Aug-08 9:21

samrw

26-Aug-08 9:21

i may have written my question improperly . Actually i have created a CDialog (Using resources)which contains user registration form in which i have to validate name, zip, country etc ... when i click the sumbit button.
i am not able to write validate for country. Sniff | :^)

Mark Salsbery26-Aug-08 9:33

26-Aug-08 9:33

samrw wrote:
i am not able to write validate for country

What defines a valid country?
Do you check the user's entry against a list?
If so, you could provide the list in a combo box so
the user can't input an unknown value.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

samrw26-Aug-08 17:16

samrw

26-Aug-08 17:16

the user registration form which i am making only contains CEdit(Edit control) from resources . so i can't use combobox. Sniff | :^)

Mark Salsbery27-Aug-08 6:26