Text file stream? - C / C++ / MFC Discussion Boards

Re: Google Login [modified]

Laxman Auti6-Jun-06 20:20

Laxman Auti

6-Jun-06 20:20

RahulRKulkarni wrote:
Link give page not found error

Check it again... sorry some text missed in link

welcome to CP

Knock out 't' from can't,
You can if you think you can
Cool | :cool:

Re: Google Login [modified]

Rahul.RK6-Jun-06 20:23

Rahul.RK

6-Jun-06 20:23

Found

Thanks.

Let's see how it helps to me

Rahul Kulkarni

How to display 2 sheets in Excel

MikeRT6-Jun-06 19:25

MikeRT

6-Jun-06 19:25

Hi ,
I have to display 2 sheet in single Excel application. I am using CWorkbook,CWorkbooks,CWorksheet,CWorksheets class for it. But I am not able to display it.Can any one know how to do this using this classes.

Mike

Re: How to display 2 sheets in Excel

FarPointer6-Jun-06 19:48

FarPointer

6-Jun-06 19:48

Hi ,
By Default it should have added default no of sheets in your excel according to the setting in the excel in mine its three .
You can also customize it using the following code :-

int lNoOfSheetsInNewWorkBook =2;
books = app.GetWorkbooks();
app.SetSheetsInNewWorkbook(lNoOfSheetsInNewWorkBook);
book = books.Add (covOptional);

Regards,
FarPointer
Blog:http://farpointer.blogspot.com/

Re: How to display 2 sheets in Excel

MikeRT6-Jun-06 20:02

MikeRT

6-Jun-06 20:02

Hi,
Thanks. I know the way u suggest. But is their any other way to do this because I have delete third sheet in this case or I may require to add the chart instead of sheet(i.e 1 sheet,1 chart in Excel). That's why I am looking for adding sheet/chart separetly.

Re: How to display 2 sheets in Excel

FarPointer6-Jun-06 20:12

FarPointer

6-Jun-06 20:12

Hi ,
You mean like this :-

_Worksheet objWorkSheet;
LPDISPATCH lpDipatch;

VARIANT sheetVar = {(short)(2 + nNewSheet)};
int count = sheets.GetCount();
objWorkSheet = sheets.GetItem(COleVariant( (short)(2 + nNewSheet)));

// Create References
sheetVar.vt = VT_DISPATCH;
sheetVar.pdispVal = objWorkSheet.m_lpDispatch;
objWorkSheet.m_lpDispatch->AddRef();

// Add new sheet at the end
lpDipatch = sheets.Add( covOptional, sheetVar,
covOptional, covOptional);

VariantClear(&sheetVar);
objWorkSheet.AttachDispatch( lpDipatch );
objWorkSheet.ReleaseDispatch();
objWorkSheet.DetachDispatch();

Regards,
FarPointer
Blog:http://farpointer.blogspot.com/

Re: How to display 2 sheets in Excel

MikeRT6-Jun-06 20:36

MikeRT

6-Jun-06 20:36

Hi,
I am doing like this.
CWorkbooks m_books=m_app.get_Workbooks();
m_books=m_books.Add(COleVariant(xlWorkSheet));
Like this way I am able to create 1 sheet. If I add 2nd sheet using this way then 2nd sheet open in another Excel application.

Text file stream?

supernalle6-Jun-06 19:16

supernalle

6-Jun-06 19:16

Hello c++ friends!

I am currently working on a handy program that scans temperature/fan control for boat engines. However I am stuck at the moment, I want it to write the average values (average value, maximum values and minimum values) to a text file hourly/daily or whatever time i define. Below is some code..

This one works just fine, it writes current temperature to a text file once every second:

void CAnalogTag::StoreData (double dRawData, BOOL bLive)
{
double dValue;
EnterCriticalSection(&m_csAccess);
m_dPrevRawValue = m_dLatestRawValue;
m_dLatestRawValue = dRawData;
LeaveCriticalSection(&m_csAccess);

if (m_pSecondsBin && bLive)
m_pSecondsBin->StoreDataPoint(dRawData);

std::ofstream ScanFile ("scanfile.txt", std::ios_base::app);

ScanFile << "Temperature: " << dRawData << endl << "Offset: " << m_dOffset << "\n";
ScanFile.close();
}

""

That works just fine, I think below is where the values that i want are stored, but I don't know how or if it's even possible to extract them:

""
void CAnalogTag::StoreData(void *pData, void *pMinData, void *pMaxData, long nNumPts, int nTrendType)
{
CArray<double, double&=""> *pTrendData = (CArray<double,double&> *)pData;
CArray<double, double&=""> *pMinTrendData = (CArray<double,double&> *)pMinData;
CArray<double, double&=""> *pMaxTrendData = (CArray<double,double&> *)pMaxData;
// store an entire array of data to the bin

switch (nTrendType)
{
case trend_seconds:
if (m_pSecondsBin)
m_pSecondsBin->SetEntireTrend(pTrendData, pMinTrendData, pMaxTrendData, nNumPts);
break;
case trend_minutes:
if (m_pMinutesBin)
m_pMinutesBin->SetEntireTrend(pTrendData, pMinTrendData, pMaxTrendData, nNumPts);
break;
case trend_hours:
if (m_pHoursBin)
m_pHoursBin->SetEntireTrend(pTrendData, pMinTrendData, pMaxTrendData, nNumPts);
break;
case trend_days:
if (m_pDaysBin)
m_pDaysBin->SetEntireTrend(pTrendData, pMinTrendData, pMaxTrendData, nNumPts);
break;
}
}

""

Any help would be appreciated.. Been stuck here for the last few days, and i think my boss is losing his patience Big Grin | :-D

Cheers,
Nalle

ask for suggestion

cheng_guo6-Jun-06 19:00

cheng_guo

6-Jun-06 19:00

i'm a layman for VC++, can anyone be kind to recommend me a book for accidence.thanks a lot

Re: ask for suggestion

_AnsHUMAN_ 6-Jun-06 19:11

_AnsHUMAN_

6-Jun-06 19:11

Microsoft Press books can be preferred.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: ask for suggestion

cheng_guo7-Jun-06 5:24

cheng_guo

7-Jun-06 5:24

thank you

Re: ask for suggestion

Hamid_RT6-Jun-06 19:33

Hamid_RT

6-Jun-06 19:33

Do you want to learning VC

whitesky

Which interface can I use to set background-repeat property?

Tcpip20056-Jun-06 18:55

Tcpip2005

6-Jun-06 18:55

I used IHTMLBodyElement to set the background picture,but I can't set the repeat property,and background-position-x,background-position-y.
What can I do?

Re: Which interface can I use to set background-repeat property?

Tcpip20056-Jun-06 21:48

Tcpip2005

6-Jun-06 21:48

I have solved the problem.
Poke tongue | ;-P

;)

Adding const won't compile

MALDATA6-Jun-06 18:48

MALDATA

6-Jun-06 18:48

I'm trying to learn C++, so I'm just building some sample classes to get some experience. I have a matrix class in which I have implemented an addition operator that looks like this...

matrix operator + (matrix& toAdd)
{
// Create a zero matrix to output.
matrix output = matrix(toAdd.get_rows(), toAdd.get_cols(), 0);

// A temporary variable for the sum of each element
double val;

// Go through every element and add them together
// Stick the result in the output matrix
for(int i = 0; i < nrows; i++)
{
for(int j = 0; j < ncols; j++)
{
// The array indices are always 1 less
// than the row or column number
val = elements[i][j] + toAdd.get_el(i+1,j+1);
output.set_el(i+1, j+1, val);
}
}
return output;
}

It's nothing fancy... hopefully you won't need to see the whole class to understand the problem.

I wanted to pass it a matrix by reference in case the matrix is huge. I figure it'd probably be good form to add a const so that it is

matrix operator + (const matrix& toAdd)

but if I add that in, it doesn't compile. I get errors like

"passing 'const matrix' as 'this' argument of 'int matrix::get_rows()' discards qualifiers"

I get one of those errors for every time I use a member function of toAdd. Without const, everything's fine, but the matrix referred to as toAdd is vulnerable to changes. I am using gcc (or, more accurately, g++) to compile. Let me know if you need more information. Thanks!

-Mark

Re: Adding const won't compile

sunit56-Jun-06 19:09

sunit5

6-Jun-06 19:09

a const object can handled by a member function qualified by const

never say die

Re: Adding const won't compile

toxcct6-Jun-06 22:00

toxcct

6-Jun-06 22:00

change your prototype into :

matrix operator + (const matrix& toAdd) const

for the same, if you say that the parameter toAdd is const, then toAdd.get_el() will crash if matrix::get_el() is not defined as const member function

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Adding const won't compile

Michael Dunn7-Jun-06 2:52

Michael Dunn

7-Jun-06 2:52

MALDATA wrote:
"passing 'const matrix' as 'this' argument of 'int matrix::get_rows()' discards qualifiers"

Make the get member functions const:

int matrix::get_rows() const<br />
{ ... }

You can only call const methods on a const object.

--Mike--
Visual C++ MVP Cool | :cool:

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How to clear the screen to recover to the old style

xuwenq886-Jun-06 18:45

xuwenq88

6-Jun-06 18:45

codes here:
//////////////////////////////////////
// fill the screen with pure color
CWindowDC dc(NULL);
CRect rect;
GetWindowRect(&rect);
CBrush br;
br.CreateSolidBrush(RGB(255, 0, 0));
dc.FillRect(&rect);

the problem is :
I want to recover to the status that the screen is not filled , how to recover?
does InvalidateRect can do it ?
why I refresh the desktop, the screen is recovered to the old style?

please give me some help, waiting for answers online!
my Email is : xuwenq88@126.com

Just my interest for these common things

Re: How to clear the screen to recover to the old style

Hamid_RT6-Jun-06 19:11

Hamid_RT

6-Jun-06 19:11

See SaveDC[^] and RestoreDC
[^]maybe it is some helpful to you

whitesky

Re: How to clear the screen to recover to the old style [modified]

Naveen6-Jun-06 21:50

Naveen

6-Jun-06 21:50

Simply to repaint the desktop use this

::InvalidateRect(0, NULL, TRUE);

nave

best book for VC++ beginners

sach!!6-Jun-06 18:32

sach!!

6-Jun-06 18:32

hello everyone!

I have just started learning VC++. Can anyone suggest me a good book for starting with VC++. I know C++ well. I dont have any idea of MFS, SDK etc.

Plz suggest me something,

Thanks,

Re: best book for VC++ beginners

nicknotyet7-Jun-06 10:15

nicknotyet

7-Jun-06 10:15

I suggest posting this in the VC++/MFC forum. I am certain you'll get a lot of suggestions there.
Would help to know your technical/coding background.

Re: best book for VC++ beginners

bob169727-Jun-06 17:46

bob16972

7-Jun-06 17:46

This is the Visual C++ / MFC forum Confused | :confused:

Re: best book for VC++ beginners

nicknotyet8-Jun-06 3:29

nicknotyet

8-Jun-06 3:29

Guess I was the one confused. Thought I was in suggestions at the time.

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