C / C++ / MFC Discussion Boards

Re: problem with strings greater then 32ks

kalyan_reddy17-Mar-04 22:55

kalyan_reddy

17-Mar-04 22:55

beter to store that much in file.....
read from a file.

Step by Step Simple Database

MeterMan16-Mar-04 16:36

MeterMan

16-Mar-04 16:36

Curious, does anyone have a link to how to make a simple Single Document Application Database using mfc? After doing some reading I see that I use CObject and CArchive however I'm kinda clueless of what to do from there. A good commented example would be great. All i want to do is have a form view to fill in a few edit boxes then it search the database (file i make) and spit out the results.
Thanks,
Ps. Anything other than the msdn site will get great the msdn site seems to far fetched.

Win32newb

"Making windows programs worse than they already are"

Re: Step by Step Simple Database

Terry O'Nolley16-Mar-04 17:02

Terry O'Nolley

16-Mar-04 17:02

This isn't going to be an MFC "purist's" response.
These steps are simply the simplest ways to get a database thing going.
They do not rely on the App Wizard to do anything. They do not tie member variables to data fields.

To access a database that has an ODBC mapping to it, do the following:
1) #include <afxdb.h> in your source file
2) To pull records from your database, do the following:

<br />
CDatabase db;<br />
db.OpenEx("XXX-ODBC DATASOURCE MAPPING NAME GOES HERE-XXX");<br />
CRecordset rs(&db);<br />
CString QueryString;<br />
CString data;			   // holds data from database<br />
<br />
QueryString = "SELECT * FROM tablename"; // SQL query goes here<br />
<br />
rs.Open(AFX_DB_USE_DEFAULT_TYPE, QueryString);<br />
<br />
// this loop will execute once for each record returned by the query in QueryString<br />
while(! rs.IsEOF())<br />
{<br />
   rs.GetFieldValue("FieldName", data);      // Tell it which field you want assigned to what variable<br />
   rs.MoveNext();  // move to the next record<br />
<br />
   // now do whatever you want with the value in data - it now contains what was in the database field specified in the GetFieldValue call<br />
}<br />
<br />
rs.Close();<br />
db.Close();<br />

I'm going to live forever or die trying
Rangers Lead The Way

Re: Step by Step Simple Database

Steve S16-Mar-04 23:01

Steve S

16-Mar-04 23:01

Isn't 'MFC purist' an oxymoron? Smile | :)

Steve S

multi-threaded socket app

Roman Nurik16-Mar-04 15:02

Roman Nurik

16-Mar-04 15:02

i want to make my own multi-thread socket classes (really really simple ones, so i can use them in my small games and such, and just to learn)

i want to create a thread that will call select() and will allow for me to wait for feedback on a set of sockets

however, i want to interrupt select() so that i can add sockets to the select list when the user calls AddSocket()

how would i do that? i dont want to forcefully end the thread, nor do i want to create a thread per-socket

hmm?

r -€

Re: multi-threaded socket app

Aaron Schaefer17-Mar-04 9:41

Aaron Schaefer

17-Mar-04 9:41

Well, I don't think you can interrupt select. But, if you want to start a thread to respond to socket events on a set of sockets, you may consider calling WSAEventSelect instead. Associate an event handle with each socket, register for events you are interested in with WSAEventSelect for each socket, then to wait for the events, call WSAWaitFormultipleEvents. The thing about this is that the array of event handles can include other events besides socket events. So, maybe the 0th event handle could be an event that another thread could use to signal the thread that is waiting for the sockets to do something else, like shutdown, or whatever else.

dbserverenum

halblonious16-Mar-04 14:29

halblonious

16-Mar-04 14:29

I'm trying to use this function, but my debugger doesn't recognize it. Is there something I need to define or add to my stdafx? Or, is there a better way to find out the name of the SQL server if it isn't local?

halblonious

Re: dbserverenum

l a u r e n16-Mar-04 15:48

l a u r e n

16-Mar-04 15:48

halblonious wrote:
Or, is there a better way to find out the name of the SQL server if it isn't local?

ummmmm i think u have to write code to do that ... ive not heard of such a debug function?

"there is no spoon"
biz stuff about me

Re: dbserverenum

David Crow17-Mar-04 2:59

David Crow

17-Mar-04 2:59

Are you getting a compiler, linker, or runtime error? If it's a compiler error, be sure to include Sqlfront.h and Sqldb.h. If it's a linker error, be sure to link with Ntwdblib.lib.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: dbserverenum

halblonious19-Mar-04 12:21

halblonious

19-Mar-04 12:21

Thanks, that did seem to work. The sweet irony is, though, that the Sqlfront.h has a compiler error itself:

Compiling...
testLibraryDlg.cpp
c:\program files\microsoft visual studio\vc98\include\sqlfront.h(126) : error C2146: syntax error : missing ';' before identifier 'LPINT'
c:\program files\microsoft visual studio\vc98\include\sqlfront.h(126) : error C2040: 'PTR' : 'int' differs in levels of indirection from 'void *'
c:\program files\microsoft visual studio\vc98\include\sqlfront.h(126) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

I'm trying to use SQLBrowseConnect to connect to an unknown server name now, but I'm having even less luck with that. I cut and pasted the example in the MSDN help, but it's got it's own compile errors.

halblonious

Re: dbserverenum

David Crow22-Mar-04 2:07

David Crow

22-Mar-04 2:07

Try moving #include <sqlfront.h> down a few lines (i.e., so that windows.h is included first).

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: dbserverenum

halblonious24-Mar-04 7:52

halblonious

24-Mar-04 7:52

Thank for responding. Somehow, I got SQLBrowseConnect to work for me, so that serves the purpose I needed. Thanks, though.

--Evan

halblonious

Re: dbserverenum

David Crow24-Mar-04 7:57

David Crow

24-Mar-04 7:57

halblonious wrote:
Somehow...

You don't remember what you did to squelch the errors with sqlfront.h?

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: dbserverenum

halblonious25-Mar-04 9:30

halblonious

25-Mar-04 9:30

No, I never figured it out. I just gave up and moved on to a different function. It took me a while, but I got SQLBrowseServer to work for me.

halblonious

Modeless Dialog - Removing the Cancel X in Title Bar

jerry1211a16-Mar-04 13:24

jerry1211a

16-Mar-04 13:24

I have an application where I create modeless dialogs. I want to remove the X (Cancel) symbol on the title bar. I have tried removing it with the properties for the dialog, but that doesnt seem to work. I have many dialogs and need to be able to move them around, etc. Can I use a graphics editor to remove the symbol? Can someone tell me how I might remove it.

Thanks.
Jerry

Re: Modeless Dialog - Removing the Cancel X in Title Bar

Navin16-Mar-04 14:38

Navin

16-Mar-04 14:38

When you call the window's Create function, try looking at the various styles. I can't remember off the top of my head, but I'm pretty sure there's one that specifies whether or not there should be a Close button.

Remember, even if you win the rat race, you're still a rat.

Re: Modeless Dialog - Removing the Cancel X in Title Bar

Prakash Nadar16-Mar-04 15:08

Prakash Nadar

16-Mar-04 15:08

It will go away if you disable the system menu.

MSN Messenger.
prakashnadar@msn.com

Re: Modeless Dialog - Removing the Cancel X in Title Bar

jerry1211a16-Mar-04 15:26

jerry1211a

16-Mar-04 15:26

It that one of the properties for the dialog?

Thank You.
Jerry

Re: Modeless Dialog - Removing the Cancel X in Title Bar

jerry1211a16-Mar-04 15:29

jerry1211a

16-Mar-04 15:29

I got it to work, I found it, thanks again.

Jerry

Auto Tracing Tool

autodebug16-Mar-04 12:19

autodebug

16-Mar-04 12:19

Try this tool. Auto tracing all apis and activex interface.
It isn't need source code.
Auto Debug Tool

Making data available to another application

RuchikaDhingra16-Mar-04 11:50

RuchikaDhingra

16-Mar-04 11:50

Hi,

I have an executable that handles user login. I want to make information (UserData oject) on currently logged in user available to other applications. Any suggestion on how to do this? I know this can be done by creating a DLL that exports the requested data. Can someone give me more details on how to do this?

Sample code will be well appreciated.

Thanks.

Re: Making data available to another application

Navin16-Mar-04 14:40

Navin

16-Mar-04 14:40

Try this[^] article, or one of the others in the Threads and IPC section.

Remember, even if you win the rat race, you're still a rat.

DLL Hook troubles

User 665816-Mar-04 11:40

User 6658

16-Mar-04 11:40

Hi!

I've got a program that globally installs a hook DLL and captures WM_MBUTTONDOWN message. This is no problem at all, it works wonderful. However, sometimes when I restart my app it looks like the hook DLL cannot be loaded and no WM_MBUTTONDOWN message are captured.
In this case I close my app (which loads the hook DLL), wait a few minutes, restart the app, and then everything works fine again. What'g going on there?

regards

modified 12-Sep-18 21:01pm.

Turn of Ellipsis in ListView

Rightoguy16-Mar-04 11:34

Rightoguy

16-Mar-04 11:34

Need to turn of the ellipsis for the ListView. I am creating the List View with No Header at runtime. I get ellipsis in XP style, when using the manifest file. If I don't use the manifest file, then it shows the whole string.
How can I turn of the ellipsis.
Any help is appreciated

Re: Turn of Ellipsis in ListView

Prakash Nadar16-Mar-04 15:06

Prakash Nadar

16-Mar-04 15:06

What is the meaning of turn of ellipse?

MSN Messenger.
prakashnadar@msn.com

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