ODBC setup - C / C++ / MFC Discussion Boards

Write/Read struct to file When the file contain strings.Simple question

28-Jul-01 10:44

Is it impossible to save and read struct to file if it contain the type CString so:
---------------------------
typedef struct p{
CString name;
int age;
}p
--------------------
p* s = new p;
...
...
file.Write(s, sizeof(p));
Cool | :cool:

Re: Write/Read struct to file When the file contain strings.Simple question

markkuk28-Jul-01 11:10

markkuk

28-Jul-01 11:10

A CString doesn't contain the actual contents of the string, but a pointer to it. So you can't just write a binary copy of the struct to a file. Either use the MFC serialization mechanism or define your own I/O routines for the struct that save and restore the text in the string.

Thank you !!!

28-Jul-01 18:01

Ftp download progress

28-Jul-01 9:42

how can i display the progress of the CFptConnection::GetFile() method using the CProgressBar?

thanks

Re: Ftp download progress

Ben Burnett28-Jul-01 16:57

Ben Burnett

28-Jul-01 16:57

You wont be able to do it with the CFptConnection::GetFile() method, you'll have to use a combination of CFptConnection::OpenFile() and CInternetFile::Read(). Then all you need to do is a simple calculation based on the file size and the amount that you have downloaded.

-Ben

---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Wink | ;)

Dialog Boxes

Orbitalne28-Jul-01 6:02

Orbitalne

28-Jul-01 6:02

I'm having a hard time trying to create a new dialog box and getting it to open whenever the program opens in a Dialog Based application in MFC. Can ANYONE help?

I Want Chicken, I Want Liver, Meow Mix, Meow Mix, Please Deliver...

Re: Dialog Boxes

28-Jul-01 7:17

If you want to show a dialog when the program opens you can declare the dialog instance and the DoModal. Note: This is not the way to create a splash screen.
Ex:
CMyDialog dlg;
dlg.DoModal();

You should include the above code on the PreCreateWindow or similar.
Cool | :cool:

Hope it helped!

ODBC setup

28-Jul-01 5:15

Hello,
UC I have made a program to retrieve data from the database for some person.

Now,everytime he formats the disk or takes the program along with the database to another system,he should install the database using ODBC...present in control panel.

How to automate this installation task from the program?

That person is extremely new to computers and can just work on it and nothing else.
Please help me fast.
Thanx:

Re: ODBC setup

Malcolm McMahon30-Jul-01 5:01

Malcolm McMahon

30-Jul-01 5:01

I haven't done this but the ODBC info is apparently in the registry: On this W2000 machine under HKEY_CURRENT_USER\Software\ODBC\ODBC.INI. Try exporting the appropriate entry as a .reg file.

Dockable view

parag28-Jul-01 5:10

parag

28-Jul-01 5:10

I have a tree view on the left and a formView on the right
i need to make the tree view as dockable window
how do i do it ?
Can anybody tell ?

parag

ClassWizard .NET

28-Jul-01 2:08

Does anyboday knows how to show ClassWizard in VisualStudio.NET ?

Re: ClassWizard .NET

Fazlul Kabir28-Jul-01 3:14

Fazlul Kabir

28-Jul-01 3:14

There is no Class Wizard in VS.NET. However you can make command and message handlers through property window.

_________________________________
Get RadVC today. Play RAD in VC++
http://www.capitolsoft.com

CInternetSession

28-Jul-01 0:54

Alright, i wrote a small program to download a file using a CInternetSession and a CInternetFile.

1) How do i retrieve the total FileSize of the file that should be downloaded?

2) The File is Truncated at random positions (?), when writing the buffer (file->ReadString(line)) to a file with fputs(outfile,line). How can i fix this ?

any help would be greatly appreciated ! Smile | :)

Re: CInternetSession

28-Jul-01 4:22

please help me, i am quite clueless about that . Or is there another way of downloading files from the net ?

Re: CInternetSession

28-Jul-01 4:56

Hi u can d/l files using CPftConnection and look for files on the server using the CFileFind class.

CpthConnection *pFtp;
pFtp = InternetSession.GetFtpConnection(...);

Re: CInternetSession

Anders Molin28-Jul-01 5:34

Anders Molin

28-Jul-01 5:34

Are you trying to download binary files or text files?

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: CInternetSession

28-Jul-01 6:27

i want to download binary files using http

Re: CInternetSession

Michael A. Barnhart28-Jul-01 17:51

Michael A. Barnhart

28-Jul-01 17:51

You initally stated using CInternetFile which is the base class for CHttpFIle and CGopherFile (spelling?).

I use this call to find the length of the returned data for CHttpFile calls. I do not know if it works with CInternetFile.

pHttpFile->QueryInfo(HTTP_QUERY_CONTENT_LENGTH, strRetBufLen);

The call pHttpFile->GetLength() returns the length of the sent string.

Hope this helps.

Finding records ...

Hadi Rezaee27-Jul-01 23:41

Hadi Rezaee

27-Jul-01 23:41

Hi all,
I wanna find all records that the name field is "Ali" or like "Ali" ... for example "AliReza" or "alireza" !!!
How can i do that ?
Can i use of Find function or i must use of SQL string ???
I'm using of DAO ...

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

Hadi Rezaie

Re: Finding records ...

skfnmuislædmufaæoi29-Jul-01 2:34

skfnmuislædmufaæoi

29-Jul-01 2:34

Hi.
The solution is very simple:
SELECT * FROM Table WHERE Name Like 'Ali*'

The question is, how to implement this:
1) If you're using Recordset-classes derieved by the classwizard, you
have to modify the CDaoRecordset::m_strFilter member
(like CMySet::m_strFilter = "Name like 'Ali*'). Remember that there is no
'WHERE'.
2) If you're using recordsets returned upon an querydef, just open the
querydef with the whole SQL-string, including that 'like' condition.

If you have further questions, you can contact me by eMail, as I'm often in touch with DAO and SQL in my projects.

--------------------------------------------------
"Pseudocode is code to demonstrate a concept, not designed to be run.
Like certain Microsoft software. "

Re: Finding records ...

Hadi Rezaee29-Jul-01 17:46

Hadi Rezaee

29-Jul-01 17:46

Thanks aloooooooooot for your helps ...
Wink | ;)

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

Hadi Rezaie

ToolTip

27-Jul-01 22:42

How can i add a tooltip to a buttons and to ToolBar burrtons?

thanks

Re: ToolTip

Florian Heidenreich28-Jul-01 5:20

Florian Heidenreich

28-Jul-01 5:20

Hi,

- to add a tooltip to a button control use CToolTipCtrl::AddTool (...)

- to add a tooltip to a ToolBar I use the Ressource Editor to add menu-items. The ids of my menu items are associated with my toolbar buttons (they have the same ressource id). In the properties dialog of a menu item, put any text in the "statusbar-text" field. The part of the string after a '\n' is used as tooltip for the toolbar automatically by the framework.

Nice day Smile | :)

,

~ Florian

--
Florian Heidenreich
WWW: http://www.mp3tag.de
eMail: codeproject@mp3tag.de

Re: ToolTip

28-Jul-01 5:58

thanks, but i am using a simple application based on a dialog, with no framework, i create this toolBar manualy, at run-time. i've tried what u said and it didnt work... any other ideas?

thanks

Problem with StretchBlt() function

julia27-Jul-01 17:31

julia

27-Jul-01 17:31

the problem i came across: i want to be able to zoom in or zoom out a bitmap
(original size is 800*600)on a dialog,every time when the user clicks the zoom button,
i stretch the bitmap by ratio of 2,4,8,16,32 of the original size.When i set my
system's color mode to 24bit true color and the ratio reach to 8,it doesn't work,
whereas under the mode of 16bit enhance color or 32bit true color,it work!
BUT WHY?Had i forgotten anything?
the code is:
CMyDialog::OnPaint()
{
CPaintDC dc(this);

HDC hdcMem1=CreateCompatibleDC(dc.GetSafeHdc());

SelectObject(hdcMem1,m_hBitmap);

int nRaster=dc.GetDeviceCaps(RASTERCAPS);
if((nRaster & RC_STRETCHBLT) !=RC_STRETCHBLT){
dc.TextOut(100,100,"Not surport StretchBlt()");
return;
}

dc.SetWindowExt(m_szImage.cx,m_szImage.cy);//m_szImage if the size of the bitmap;
dc.SetViewportExt(m_szImage.cx,m_szImage.cy);

dc.SetStretchBltMode(COLORONCOLOR);

BOOL ret=StretchBlt(dc.GetSafeHdc(),0,0,m_szImage.cx,m_szImage.cy,hdcMem1,0,O,800,600,SRCCOPY);

DeleteDC(hdcMem1);

}

Thank in advance;
Truely yours julia. Confused | :confused:

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