MDI Doc/View CDatabase app general questions - C / C++ / MFC Discussion Boards

Re: Find files that are being used

P Gibson15-Mar-06 6:06

P Gibson

15-Mar-06 6:06

here is the actual link http://www.codeproject.com/file/directorychangewatcher.asp[^]

Re: Find files that are being used

David Crow15-Mar-06 6:09

David Crow

15-Mar-06 6:09

That would not work unless something about the file was changed.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

ESC and DEL button

mkoliv28-Sep-16 1:30

mkoliv

28-Sep-16 1:30

Thanx

Re: ESC and DEL button

Hamid_RT15-Mar-06 4:59

Hamid_RT

15-Mar-06 4:59

WM_KEYDOWN

Mouse Position

pc_dev15-Mar-06 4:20

pc_dev

15-Mar-06 4:20

How can i get the mouse position. where ever the mouse be?

Re: Mouse Position

toxcct15-Mar-06 4:28

toxcct

15-Mar-06 4:28

relative to your application or the screen ?

Re: Mouse Position

Hamid_RT15-Mar-06 4:34

Hamid_RT

15-Mar-06 4:34

GetCursorPos

MDI Doc/View CDatabase app general questions

23_44415-Mar-06 3:05

23_444

15-Mar-06 3:05

I am writing a MDI database app using a splitter window (upper pane = parent table) (lower pane= child table) and am unsure as to the responsibilities of each class. I have it working but am always trying to better myself.

I have a database object (CDatabase)
I have a recordset object (CRecordset)
I have a document object (CDocument)
I have several views (CFormView)
I have a CSplitterWnd hosting the CFormViews

I realize the document holds the data. So here are my questions

I have seen an example where the document holds a member variable of both the Recordset and the Database and am currently adopting this scenario.

But which class is responsible for actually creating the recordset or does it matter? I currently have the document creating the database and each formview class responsible for creating the recordset of its pane. My document holds a member pointer of the recordsets created in the view

Is it appropriate to use the UpdateAllViews from the CDocument class to invoke the OnUpdate of each view? Then overide the OnUpdate in the view class to run a requery and other housekeeping procedures. Normally I associate the UpdateAllViews with some sort of visual activity in the Views but with a database it's all about requerying and housekeeping.

Thanks

Re: MDI Doc/View CDatabase app general questions

Dennis Gourjii15-Mar-06 3:17

Dennis Gourjii

15-Mar-06 3:17

It depends.
IMHO, it would be much better to hold your CDatabase and CRecordset objects together in the CDocument-derived class of yours because they are essentially serving the same purpose - to link your views to data. However, if recordset objects are subject to heavy dynamic user-invoked changes, I'd normally prefer to associate them with views.
That's what I think, although it's so much more a matter of preference than of being right or wrong...

Re: MDI Doc/View CDatabase app general questions

23_44415-Mar-06 5:39

23_444

15-Mar-06 5:39

Thanks,

Does it matter where those recordset objects get instantiated with the new keyword (CDatabase or CFormView)?

Re: MDI Doc/View CDatabase app general questions

Dennis Gourjii16-Mar-06 2:55

Dennis Gourjii

16-Mar-06 2:55

Yes, it does matter for me. I'd create them immediately where they are used, but also exactly where "main" pointers to them are stored (i.e. those pointers you use to delete recordsets; it's important as this must be done only once and preferably in a function called from the destructor of your CDatabase or CFormView object).
The worst thing to do IMHO is to split the code that works with these recordset objects into several parts based in different classes. Chances are all hell will break loose upon you when:
a) execution flow comes to destruction and oops you overlook a leak or delete objects twice or whatever else...
b) the program swells in size and soon you are no longer able to track down all activities associated with recordsets.
Keep it simple. In the end it's much better to misplace pointers but code consistently keeping in mind this architecture than to make a correct design decision (if there is one) but implement it inconsistently or in a sophisticated manner.

[Message Deleted]

ddmcr15-Mar-06 2:53

ddmcr

15-Mar-06 2:53

[Message Deleted]

Re: Registering extension and icon for your application

Dennis Gourjii15-Mar-06 3:07

Dennis Gourjii

15-Mar-06 3:07

Just found this link. The source code is Borland-specific, but you can figure from it what registry entries to modify.

http://bdn.borland.com/article/0,1410,19646,00.html[^]

Re: Registering extension and icon for your application

toxcct15-Mar-06 4:30

toxcct

15-Mar-06 4:30

what language is that ?

obviously not C++ !!

Re: Registering extension and icon for your application

David Crow15-Mar-06 3:17

David Crow

15-Mar-06 3:17

Giorgi Moniava wrote:
1) Register an extension for my application on the system where it will be installed.

See here (second response).

Giorgi Moniava wrote:
3) When the user opens the file with the abovementioned extension I want that my program was launched.

This is the same as #1, and should happen automatically.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Write memory bitmap to BMP file?

FleetAdmiral15-Mar-06 2:19

FleetAdmiral

15-Mar-06 2:19

In a MFC dialog based programm, I add a button control, and the corresponding message function is:
void CHhhhDlg::OnButton1()
{
// TODO: Add your control notification handler code here
CClientDC clientDC(this);
CDC memDC;
memDC.CreateCompatibleDC(&clientDC);
CRect rcClient;
GetClientRect(&rcClient);
CBitmap membitmap;
membitmap.CreateCompatibleBitmap(&clientDC, rcClient.Width(),
rcClient.Height());
memDC.SelectObject(&membitmap);
for (int x = 0; x < rcClient.right; x ++)
{
for (int y = 0; y < rcClient.bottom; y ++)
{
memDC.SetPixel(x, y, x < y ? RGB(255, 255, 0) : RGB(255, 0, 0));
}
}
clientDC.BitBlt(0, 0, rcClient.Width(), rcClient.Height(), &memDC, 0, 0, SRCCOPY);
}
Now, I want to comments the last statement, and save the memeory bitmap (memDC) to a BMP file.

How can I achieve this objective.

Thanks!

Re: Write memory bitmap to BMP file?

Hamid_RT15-Mar-06 2:40

Hamid_RT

15-Mar-06 2:40

if you want to save bmp file use CImage::Save

-- modified at 8:40 Wednesday 15th March, 2006

Re: Write memory bitmap to BMP file?

David Crow15-Mar-06 2:42

David Crow

15-Mar-06 2:42

FleetAdmiral wrote:
How can I achieve this objective.

See here.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Crystal Reports Dev 11

xdeveloper_del15-Mar-06 1:59

xdeveloper_del

15-Mar-06 1:59

Hi all,
i have been working on incorporating crystal reports into an mfc application. I am able to call the RunReportWizard method in the following way.
/////
m_Application->RunReportWizard(m_Report," ");
//where m_Report is IReportPtr and m_Application is IApplicationPtr.

Its working. but is it the correct way of calling. The second parameter in which i am passing an empty string must specify the datasource. Can anyone also please tell me how can i pass only a certain type of data connection to this method. the wizard shows all the available connections.
Please help.

Help me E_FAIL Error

dharani15-Mar-06 1:33

dharani

15-Mar-06 1:33

HI all
I have an application which uses a Filetransfer module (.tli file is involved while i debug) .

And a function raw_SendFile fails with return value of 0x80004005 (E_FAIL) when it tries to send a file.
To give more info : This function is called N times to send N files , and it properly sends say 10 files . And exacltly when it sends the 11th file named ramdisk\rd.gz it fails . And everytime this is reproducible and exacltly at this file , this function fails .
And my search in MSDN about E_FAIL says "Unspecified error" . What is this unspecified error ?
How can I solve it ?
Can anyone please help me ????

redindian

Re: Help me E_FAIL Error

James R. Twine15-Mar-06 3:47

James R. Twine

15-Mar-06 3:47

   Generally, this a sign of poor implementation of the component. Any developer that returns E_FAIL instead of an appropriate error code should be shot...! Not that E_FAIL does not have its uses - it does, but clearly not here.

   I would be looking into what might be special about that 11th file - is it on a different device, is it locked, etc.

   Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)

Re: Help me E_FAIL Error

dharani15-Mar-06 16:24

dharani

15-Mar-06 16:24

Hi James
Thanks .
Well I would like to add more points to you .
The files are taken from a delivery folder in a server, say A .
The application that tries to send these files are in system , say B.
And the destination is also a server ,say C, in a remote location , to which B connects via modem direct .
So when B tries to send the files from A to C this error occurs .
And one interesting thing is -> B is a linux call server which is called a PABX in telecom .

Could you please clarify the points ?
a) How will you check whether the file(s) is locked or not ?
b) Will ethreal traces be helpful ?

Thanks in advance

redindian

Re: Help me E_FAIL Error

dharani15-Mar-06 17:30

dharani

15-Mar-06 17:30

Hi James
Sorry I typed wrong ...
Server C is the callserver .
System B is XP
Server A is sun machine (A is not involved in this problem)

regards

redindian

Newbie - odbc/mysql

antonaras_marcou15-Mar-06 1:14

antonaras_marcou

15-Mar-06 1:14

Hi again
I hava another question for you but this i time i'm completly lost.
I need to connect to a database in order for retriving and storing.
I've never done something simmilar before so i have no idea.
i prefer to use mysql database.
i've read something about odbc and thats what i'm willing to use(if u have other suggestions pls tell me)

Any way can anybody tell me what i need to include
and what are the first steps of the code to connect to the database(is it possible to avoid wizards).
Also do u have any good reference on this matter which i can read to get a good understanding of how odbc works.

Thanks in advance

Re: Newbie - odbc/mysql

David Crow15-Mar-06 2:44

David Crow

15-Mar-06 2:44

Here is a semi-relevant article.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

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