Re: question about deleting a record in a database table. - C / C++ / MFC Discussion Boards

Re: CRichEditCtrl and URL link …

Hadi Rezaee5-Sep-02 10:44

Hadi Rezaee

5-Sep-02 10:44

It doesn't work again Cry | :((

Please check my mail

Regards,

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Read Mime Settings

Matt Newman4-Sep-02 8:33

Matt Newman

4-Sep-02 8:33

How do I read the mime settings for an extension and then retrieve the icon path and index? Can this be done efficiently?

Also. How do I get the path of the system directory. For example mine is C:\Windows\System32. I want my app to be able to adjust for varying installations.

- Suspicious | :suss:

Matt Newman / Windows XP Activist Suspicious | :suss:

-Sonork ID: 100.11179

"You can't seriously believe that you could get away with suing someone over quoting text from a message posted in a public forum, can you?" - John Simmons

Re: Read Mime Settings

Andreas Saurwein4-Sep-02 11:37

Andreas Saurwein

4-Sep-02 11:37

For the mime settings I believe you have to read them from the registry.

And the simplest way to obtain a path to the windows dir is GetWindowsDirectory() and GetSystemDirectory() or just use ExpandEnvironmentStrings()

int x=1, y=5; 
x^=y^=x^=y; // whats the content of x and y now?
<a href="http://www.codeproject.com/tips/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>

Re: Read Mime Settings

Matt Newman5-Sep-02 8:59

Matt Newman

5-Sep-02 8:59

Andreas Saurwein wrote:
GetSystemDirectory()

Thanks, thats what I needed

- Suspicious | :suss:

Matt Newman / Windows XP Activist Suspicious | :suss:

-Sonork ID: 100.11179

"You can't seriously believe that you could get away with suing someone over quoting text from a message posted in a public forum, can you?" - John Simmons

question about deleting a record in a database table.

ns4-Sep-02 8:34

4-Sep-02 8:34

If you delete a record from a database, do the remaining records arrange themselves so that if #5 was deleted, #6 now becomes the new #5 etc?
Or does some other type of reordering hapen? If so what control do we have over this ordering?

Re: question about deleting a record in a database table.

Carlos Antollini4-Sep-02 8:43

Carlos Antollini

4-Sep-02 8:43

Depends of the primary key of the table....
I believe that that will happen.

Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: question about deleting a record in a database table.

ns4-Sep-02 8:50

4-Sep-02 8:50

Thanks. There is no primary key though....I am doing PutAbsolutePosition(index) and deleting them.

If there are none left, and I try to delete one, I am sure it will crash. so how would I test my delete condition? Check recordcount before each delete?

Important question: ReQuery(-1)
Do I have to requery? I feel that I should so that the deleted record vanishes (thats what I read anyways). Whats your opinion?
thanks,
ns

Re: question about deleting a record in a database table.

Alexandru Savescu5-Sep-02 20:48

Alexandru Savescu

5-Sep-02 20:48

It depends. If you are using CRecordset and ODBC then they are not arranged. You sould use Move(0) to refresh current row. Also you can test if the row has beem deleted with the IsDeleted method.

Best regards,
Alexandru Savescu

Compilation Question

Michael Pyatski4-Sep-02 7:50

Michael Pyatski

4-Sep-02 7:50

When I copy a folder with my source and binary files to a different folder, it is necessary to re-build the whole project, even though it was
built successfully at a previous location. Why is that? How can I avoid it when moving projects do a different location on a hard drive?

Thanks,

Michael

Re: Compilation Question

Matthew R. Miller4-Sep-02 10:26

Matthew R. Miller

4-Sep-02 10:26

Because Microsoft probably does something like taking the checksum of the path and file, so that if there any changes to the file or location... most likely it will need to be recompiled. Since you are moving all of your files, all files have changed. Cheers!

<><><><><><><><><><><><><><>
Matthew R. Miller
mattrmiller@computersmarts.net
www.computersmarts.net

Re: Compilation Question

Stephane Rodriguez.4-Sep-02 10:38

Stephane Rodriguez.

4-Sep-02 10:38

No, MSDEV will not recompile, as it simply does a touch (Unix word for last modified date comparison).

And I swallow a small raisin.

Re: Compilation Question

Gary R. Wheeler5-Sep-02 3:10

Gary R. Wheeler

5-Sep-02 3:10

If any of your projects create COM objects, the build process automatically registers them. The registration process places entries in the registry that associate the class and interface ID's with your object, and the location of that object's code on disk. Therefore, when you move the object's code to a different place, Windows can no longer find it. Rebuilding the project re-registers the objects and fixes the problem.

Gary R. Wheeler

lost cursor

Anonymous4-Sep-02 6:34

Anonymous

4-Sep-02 6:34

Hi,

I have a problem which can be reduced to the following question: how can I place programmatically the cursor to a given position in my view?

In more detail: I make some manipultions of the UI and at this time the focus in the main window gets lost. I tried

1. Setting focus to the MainFrame

pFrame->SetFocus();

2. Setting focus to the view

pView->SetFocus();

3. Showing the caret at its previous position

pView->SetFocus();
pView->SetCaretPos(pointCaret);
pView->ShowCaret();

without success, the cursor remains lost.
Its about a CHtmlEditView.
Any help would be highly appreciated.

Thanks

R.

Re: lost cursor

John Fisher4-Sep-02 7:56

John Fisher

4-Sep-02 7:56

You'll need to use the SetCursorPos() function rather than SetCaretPos().

John

help! How to exit gracefully

ns4-Sep-02 6:34

4-Sep-02 6:34

In my view class I have a CFileDialog:

int nRetMainDB =  fileDlg.DoModal();

if (nRetMainDB == IDCANCEL)return;

Now if the user presses cancel I want the app to exit. With the return that I have above,
it doesnt terminate the program , just crashes! Why? and how do I exit?

Thanks,
ns Confused | :confused:

Re: help! How to exit gracefully

Gero Gerber4-Sep-02 6:43

Gero Gerber

4-Sep-02 6:43

Maybe PostQuitMessage() will help you...

Gero

Re: help! How to exit gracefully

Abin4-Sep-02 7:18

Abin

4-Sep-02 7:18

I usually do the following:

if (nRetMainDB == IDCANCEL) { exit(0); }

Thanks much !!

ns4-Sep-02 7:29

4-Sep-02 7:29

I appreciate both the responses. I implemented the PostQuitMessage(0) since I'd gotten it first and it seems to be doing fine! Thanks for the exit(0) too.
ns Laugh | :laugh:

Accelerator Keys in dialog

DRHuff4-Sep-02 5:50

DRHuff

4-Sep-02 5:50

I have a menu in a dialog but the accelerator keys don't work eg Alt-F does not drop down the file menu.

How do I make it work?

Thanks

Dave

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Accelerator Keys in dialog

Tomasz Sowinski4-Sep-02 5:56

Tomasz Sowinski

4-Sep-02 5:56

Works for me - I've created dialog-based app, added menus to main dialog and about box and everything works as expected.

Are you playing with PreTranslateMessage?

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: Accelerator Keys in dialog

DRHuff4-Sep-02 6:04

DRHuff

4-Sep-02 6:04

This is not a dialog based app but a dialog called by an SDI app. I am not touching PreTranslateMessage.

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Accelerator Keys in dialog

Max Santos4-Sep-02 7:44

Max Santos

4-Sep-02 7:44

I made a SDI application that opens a dialog (modal) with a menu.
work fine.

Are you using modeless dialogs?? (i did not try it)

Casa.Sapo.pt

Re: Accelerator Keys in dialog

C^hris L^osinger4-Sep-02 7:55

C^hris L^osinger

4-Sep-02 7:55

for dialogs, you can load the accelerators yourself, in PreTranslateMessage:

/////////////////////////////////////////////////////////////////////////////

BOOL ColorEditWnd::PreTranslateMessage(MSG* pMsg) 
{
   if (m_bUseKBAccel)
   {
      if ((pMsg->message == WM_KEYDOWN) && (pMsg->hwnd == m_hWnd))
      {
         HACCEL hAccel = LoadAccelerators( AfxGetInstanceHandle(), MAKEINTRESOURCE(IDR_EDIT_ACCELS) );
         if (::TranslateAccelerator( m_hWnd, hAccel, pMsg ) )
         {
            // yes, we handled the accel.
            return TRUE;
         }
         else
         {
            return CWnd::PreTranslateMessage(pMsg);
         }
      }
   }

   return CWnd::PreTranslateMessage(pMsg);
}

-c

Gourmet, n:
Anyone whom, when you fail to finish something strange or
revolting, remarks that it's an acquired taste and that you're
leaving the best part.

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Re: Accelerator Keys in dialog

Andreas Saurwein4-Sep-02 12:41

Andreas Saurwein

4-Sep-02 12:41

Please dont suggest loading the accels on every keystroke. Do it in OnInitDialog at least.

int x=1, y=5; 
x^=y^=x^=y; // whats the content of x and y now?
<a href="http://www.codeproject.com/tips/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>

Re: Accelerator Keys in dialog

C^hris L^osinger4-Sep-02 12:45

C^hris L^osinger

4-Sep-02 12:45

that step was left to the reader.

thanks for contributing.

-c

"I am angry that so many of the sons of the powerful and well-placed... managed to wangle slots in Reserve and National Guard units...Of the many tragedies of Vietnam, this raw class discrimination strikes me as the most damaging to the ideal that all Americans are created equal and owe equal allegiance to their country."
--Colin Powell

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