Login dialog problem - C / C++ / MFC Discussion Boards

Convert int to CString

30-Apr-02 5:24

This is probably a total beginner question!!

How do I convert ..

int iID =5
into a
CString strID

Thanks

Re: Convert int to CString

Mike Zinni30-Apr-02 5:31

Mike Zinni

30-Apr-02 5:31

strID.Format("%d", iID) should do the trick...

-Mike Zinni
Software Engineer
email: mzinni@rimail.com
AIM: zin9999

Get Integer Value from database

30-Apr-02 5:52

Thanks for answering me. I thought that would solve a problem that I'm having but it doesn't. So maybe you can help me with this.

The following lines of code are supposed to retrive data from a database. I know this works when all values in the database are strings. But now the first column are integers. The error I get is below. Do you know how I can fix this?

Thanks,
Alan

/***************************************/

long iID;
CString strName, strNumber;

...

while (!recset.IsEOF())
{
//Copy each column into a variable
recset.GetFieldValue("Address ID",iID);
recset.GetFieldValue("First Name",strName);
recset.GetFieldValue("Home Number",strNumber);

//Insert values into the list control
iRec = m_MyListControl.InsertItem(0,iID,1);
m_MyListControl.SetItemText(0,1,strName);
m_MyListControl.SetItemText(0,2,strNumber);

//Go to the next record
recset.MoveNext();
}

Error:
void __thiscall CRecordset::GetFieldValue(const char *,class CDBVariant &,short)' : cannot convert parameter 2 from 'long' to 'class CDBVariant &'

Re: Get Integer Value from database

Nish Nishant30-Apr-02 6:03

Nish Nishant

30-Apr-02 6:03

I havent done much with CRecordSet. But if you have no problems with CStrings, then get the first column into a CString and then convert it to an integer.

Nish

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Re: Get Integer Value from database

Alexandru Savescu30-Apr-02 6:29

Alexandru Savescu

30-Apr-02 6:29

You should use a CDBVariant object like this: (read MSDN for details about CDBVariant)

CDBVariant dbv;
recset.GetFieldValue ("Address", dbv);
iID = dbv.m_lLong;

or you can read it in a CString and then call atoi function to get an integer value

If you are going to port your application to VC7 you will notice that GetFieldValue does no longer take a CString as a first parameter. So you should use:
recset.GetFieldValue ((short)0, strName);

This is one bit of VC 6.0 that does not compile on VC 7.0

Best regards,
Alexandru Savescu

Re: Get Integer Value from database

Tom Archer30-Apr-02 7:43

Tom Archer

30-Apr-02 7:43

You have two choices here. You can either construct and pass a CDBVariant or you can pass a CString and convert the returned value:

CString strID;
recset.GetFieldValue("Address ID",strID);
long iID = atol(strID);

CDBVariant v;
v.Clear();
v.m_dwType = DBVT_LONG;

recset.GetFieldValue("Address ID", v);
// your value will be in the v.m_lVal member

I'm typing this without testing it, but this should be very close to what you need.

Cheers,
Tom Archer
Author, Inside C#

A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the affairs of others.

Re: Convert int to CString

1-May-02 20:10

i think the best way is
take an object CString strID;
use the following for conversion
strID.Format(" %d ",iID);
strID is a string object containing 5 as string value
u can convert anything into string
eg:
pointer ptr can b converted as
strID.Format(" %x ",ptr);

solini30-Apr-02 5:23

solini

30-Apr-02 5:23

I'm building a Document/View based program.

When a user wants to use the program the following should happen:
a) A login dialog box should appear on the screen
b) If a user enters a valid login the program should become accessible
c) If a user enters invalid login information the program should end
d) And also if the user presses Cancel the program should end

something like this:

CDlgLogin dlg;
int nLogin = dlg.DoModal ( );
if( nLogin == IDOK )
{
//check login information
}
else if( nLogin == IDCANCEL )
{
//shutdown the program
}

What I'm not sure about is WHERE to put this information Confused | :confused:

I've tried the "ProgramView.cpp" and "MainFrm.cpp" files but I always get silly access violations or something like that when a user presses "Cancel"

What do I need to do for this to work ? Please please help me if you can Rose | [Rose]

Best wishes from Iceland Blush | :O

Solini

Re: Login dialog problem

Thomas Freudenberg30-Apr-02 5:37

Thomas Freudenberg

30-Apr-02 5:37

The easiest way is to put that stuff into the CYourApp::InitInstance

Regards
Thomas

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Re: Login dialog problem

Joaquín M López Muñoz30-Apr-02 5:39

Joaquín M López Muñoz

30-Apr-02 5:39

A good place to insert this is in your CWinApp-based InitInstance, just before anything else. If the login fails, just return FALSE.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Login dialog problem

l a u r e n30-Apr-02 8:09

l a u r e n

30-Apr-02 8:09

we have a login screen just as you describe
at the end of InitInstance() we post a message to ourselves mimicking the 'log on' toolbar button
the logon box pops up very nicely Smile | :)

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"good morning ... how many sugars do you take in your coffee ... and what was your name again?"

coming soon: situations to avoid #38: "...and the dog was there too?"

Re: Login dialog problem - Solved

30-Apr-02 8:16

Thank you everyone... putting the doModal( ) into the InitInstance function worked perfectly

Smile | :)

Howto change background color without redrawing content ?

Brian van der Beek30-Apr-02 5:20

Brian van der Beek

30-Apr-02 5:20

I need to change the background color of an OCX composite control at a regular basis. When I do this the composite control and all controls within are redraw. This causes the application to flicker. Can this somehow be prevented?

Re: Howto change background color without redrawing content ?

Joaquín M López Muñoz30-Apr-02 5:35

Joaquín M López Muñoz

30-Apr-02 5:35

Can you modify the source code of the OCX? If so, consider using double-buffering when painting. Check Keith Rule's Flicker Free Drawing In MFC.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Howto change background color without redrawing content ?

Brian van der Beek2-May-02 4:25

Brian van der Beek

2-May-02 4:25

Thanx for yor reply. I can modify the OCX code, however my OCX is a composite control and it seems that the OnDraw is never called, instead the CAXWindowHost::OnPaint. Overloading this call seems tricky, do you know how I can trigger the OnDraw of the composite control?

Exiting a DirectShow movie on keypress...

30-Apr-02 5:12

Hi,

I have written a small application using DirectShow that plays an MPEG or AVI movie in full screen mode. My code is based on the "playit" sample code that comes with the DirectX SDK (or at least it came with 6.1), and it uses WinAPI. All I want to do is have it so that the movie finishes (exits) as soon as you press any key on the keyboard (or one of the mouse keys, though that's not as vital). This is probably a very dumb question (I am very new to DirectX and not a very experienced programmer in general), but how can I do this? I *think* that I somehow need to send the message EC_USERABORT to the movie window as soon as the user presses a key. I have tried using put_MessageDrain() and so on, but it doesn't seem to recognise my window - or at least, it doesn't work.

This is the main loop of the PlayMovie() function:

long evCode, param1, param2;
bool bcomplete=false;

while (hr = pME->GetEvent(&evCode, ¶m1, ¶m2, INFINITE), SUCCEEDED(hr))
{
switch(evCode)
{
case EC_USERABORT:
bcomplete=true;
break;

case EC_COMPLETE:
bcomplete=true;
break;
}
hr = pME->FreeEventParams(evCode, param1, param2);
if(bcomplete==true){break;}
}

If anybody could tell me how to get my movie to close as soon as the user hits any key, I would be very grateful.

Many thanks for any help,
KB

P.S. Apologies - I posted a similar message a few days ago; however, I am still stuck and my old post seems to have been lost pages back...

How to get display card information by C++?

yungivan30-Apr-02 5:00

yungivan

30-Apr-02 5:00

Hi, is it possible to get the information of the display card through C++? Any sample code? Thanks.

Re: How to get display card information by C++?

Paul M Watt30-Apr-02 5:37

Paul M Watt

30-Apr-02 5:37

EnumDisplayDevices to get the video cards
EnumDisplayMonitors for the monitors

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Light a man on fire, and he will be warm for the rest of his life!

Set mouse position

ISIS5530-Apr-02 4:39

ISIS55

30-Apr-02 4:39

How do I set the mouse position (in absolute coordinates) in Win32?

Thanks.

Isaac Sasson,
Lean, mean posting machine!
Sonork ID 100.13704

Re: Set mouse position

Paul M Watt30-Apr-02 5:01

Paul M Watt

30-Apr-02 5:01

Use this function:

BOOL SetCursorPos(
  int X,  // horizontal position
  int Y   // vertical position
);

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Set mouse position

ISIS5530-Apr-02 9:36

ISIS55

30-Apr-02 9:36

Thanks! I forgot the function name and I'd hate to look through MSDN. Wink | ;)

Isaac Sasson,
Lean, mean posting machine!
Sonork ID 100.13704

Re: Set mouse position

Paul M Watt30-Apr-02 10:02

Paul M Watt

30-Apr-02 10:02

I think that looking through MSDN is a skill that you become good at only after years of practice and experience. Smile | :)

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Set mouse position

ISIS5530-Apr-02 10:26

ISIS55

30-Apr-02 10:26

The good thing though is that it will take years to complete your first search, so by the second one you'd be an expert... Poke tongue | ;-P

Isaac Sasson,
Lean, mean posting machine!
Sonork ID 100.13704

Re: Set mouse position

Philippe Mori30-Apr-02 13:16

Philippe Mori

30-Apr-02 13:16

SetCursorPos(x, y) where x and y are screen coordinates.

If you have client coordinates or coordinates relatives to another window, then you can uses function like MapWindowPoints or ClientToScreen to do the proper conversion.

Philippe Mori

CWaitCursor

Steve Hopkins30-Apr-02 4:21

Steve Hopkins

30-Apr-02 4:21

Hi, could anyone give me an answer to this.

We have a long operation involving that we have wrapped with a CWaitCursor. However, during the processing, the cursor flickers back and forward to the pointer.

Any ideas what we can do to keep the hourglass visible?

Cheers,

Steve.

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