csv file problem - C / C++ / MFC Discussion Boards

CPallini1-Apr-10 21:21

1-Apr-10 21:21

Are you using MSXML also to query inside the XML, e.g. for obtaining directly the content of the text node "0 1 2 3 4 5 6 7 8 9"?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Processing strings ASAP

PaulowniaK1-Apr-10 21:32

PaulowniaK

1-Apr-10 21:32

Yes, I do:

MSXML2::IXMLDOMDocument* pXMLDOM;
MSXML2::IXMLDOMNode* pNode;
BSTR bstrContent;

pXMLDOM->get_firstChild(&pNode);
pNode->get_firstChild(&pNode);
pNode->get_text(&bstrContent);

Then something like

CString strContent(bstrContent);
SysFreeString(bstrContent);
int iPos = strContent.Find("\t"); etc etc etc...

Almost, but not quite, entirely unlike... me...

Re: Processing strings ASAP

CPallini1-Apr-10 21:48

CPallini

1-Apr-10 21:48

Well, if the performance is OK, I wouldn't change such approach.
Smile | :)

Re: Processing strings ASAP

PaulowniaK1-Apr-10 22:03

PaulowniaK

1-Apr-10 22:03

CPallini wrote:
if the performance is OK

That's the thing... I'm thinking it might be too slow.
But I have to balance the time it's going to take me to understand and write lower level code... Sigh | :sigh:

Almost, but not quite, entirely unlike... me...

Re: Processing strings ASAP

CPallini1-Apr-10 22:16

CPallini

1-Apr-10 22:16

At first, you may try to discard the CString step and parse directly the BSTR.
Smile | :)

Re: Processing strings ASAP

PaulowniaK4-Apr-10 14:20

PaulowniaK

4-Apr-10 14:20

CPallini wrote:
parse directly the BSTR.

Sorry for being dim, but does that mean I have to check each character to see what's written?

Almost, but not quite, entirely unlike... me...

Re: Processing strings ASAP

CPallini5-Apr-10 0:09

CPallini

5-Apr-10 0:09

Well, you may consider the BSTR as a wide char string, hence you may use the corrensponding functions like, for instance, wcstok [^].
Smile | :)

csv file problem

Member 5903101-Apr-10 19:29

Member 590310

1-Apr-10 19:29

hi,
i m reading data of csv file in a char buffer like this
CFile shopCart(strFileName,CFile::modeRead);
char buff[5000]={0};
shopCart.Read(buff,sizeof(buff));
and then saving changes before closing application in this way.

CFile::Remove(strFileName);
CFile csvFile(strFileName,CFile::modeWrite |CFile::modeCreate );
strCSV = L"|" + strCSV+ char(13) + char(10);
csvFile.Write(strCSV,strCSV.GetLength()*sizeof(TCHAR));

problem is that at first exec buffer holds data of all the file but after closing and re exec buffer contains only one character of file even though file contains same data after updation.wat can be the problem may b?

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 19:45

Eugen Podsypalnikov

1-Apr-10 19:45

Please compare the return values of UINT uiReadBytes = chopChart.Read(..);
at the first an secon running and post them here Smile | :)

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 20:01

Member 590310

1-Apr-10 20:01

in both cases uireadbytes contains 0.

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 20:12

Eugen Podsypalnikov

1-Apr-10 20:12

Try it

{
...
  CFile cFile;
  if (cFile.Open(strFileName, CFile::modeRead)) {
    BYTE byBuffer[1024] = {0};
    UINT uiReadBytes = cFile.Read(byBuffer, sizeof(byBuffer));
    CString cszMessage;
    cszMessage.Format(_T("File: %s:\r\nCount of read bytes = %u"),
                      strFileName, uiReadBytes);
    AfxMessageBox(cszMessage);
    cFile.Close();
  }
...
}

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 20:31

Member 590310

1-Apr-10 20:31

actually on saving file at close of application it is inserting end of file after every character.this is actually the problem.

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 20:35

Eugen Podsypalnikov

1-Apr-10 20:35

Please answer,
what have you seen at the message boxes ? Smile | :)

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 20:45

Member 590310

1-Apr-10 20:45

in both cases it is showing count 1024 in messageboxes..my qus is that where is my code inserting EOF after every character?

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 20:53

Eugen Podsypalnikov

1-Apr-10 20:53

Good, the file can be read in the both cases Smile | :)

What is your next step (wish) please ? Smile | :)

Would you like to read and write
an UNICODE or ANSI csv-file ? Smile | :)

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 20:59

Member 590310

1-Apr-10 20:59

why my code is inserting EOF after evry character on saving file.where my code is wrong?

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 21:03

Eugen Podsypalnikov

1-Apr-10 21:03

When your project is configured as UNICODE project
the output will be performed by two bytes per character...

Would you like to see your output in ANSI ? Smile | :)

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 21:04

Member 590310

1-Apr-10 21:04

yes?but i want to keep the project as unicode

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 21:11

Eugen Podsypalnikov

1-Apr-10 21:11

چرا که نه؟

Just convert your string to ANSI sequence:

#include <AtlConv.h>
...
{
...
  USES_CONVERSION;
  LPSTR lpszANSI = T2A(cszOut);
  cOutFile.Write(lpszANSI, strlen(lpszANSI));
...
}

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 21:24

Member 590310

1-Apr-10 21:24

thanx a lot Eugen Podsypalnikov that was what the problem was actually it was inserting extra byte.thanx nw it is working fine after converting to ansi.
Regards

Re: csv file problem

Eugen Podsypalnikov1-Apr-10 21:29

Eugen Podsypalnikov

1-Apr-10 21:29

You are welcome !

(sometimes I do read and write UNICODE csv-files,
you could it too, when it will be needed once Smile | :)

)

virtual void BeHappy() = 0;

Re: csv file problem

Member 5903101-Apr-10 21:30

Member 590310

1-Apr-10 21:30

yeah thanx Wink | ;)

How to calculate width and height of different font size ,font style and no of characters ?

shiv@nand1-Apr-10 19:16

shiv@nand

1-Apr-10 19:16

Hi i want to crate a rectangle based on the font size, font style,and number of charactes.So How can i decide width and height of different font size,font style & number of characters.

Re: How to calculate width and height of different font size ,font style and no of characters ?

Adam Roderick J1-Apr-10 19:30

Adam Roderick J

1-Apr-10 19:30

You can get the font information from CWnd member GetFont(http://msdn.microsoft.com/en-us/library/cb4schcy(VS.80).aspx)

And GetLogFont of the CFont will help get the information about the font.
http://msdn.microsoft.com/en-us/library/zhcs623h(v=VS.71).aspx

Величие не Бога может быть недооценена.

Re: How to calculate width and height of different font size ,font style and no of characters ? [modified]

Eugen Podsypalnikov1-Apr-10 20:04

Eugen Podsypalnikov

1-Apr-10 20:04

This function could calculate the text dimensions Smile | :)

void GetTextSize(CSize& cResultSize,     // Receiving size of the text rectangle
                 CDC* pcDC,              // Surface context
                 CFont* pcFont,          // Font for the context
                 const CString& cszText) // Text to measure
{
  if (pcDC && pcFont) {
    CGdiObject* pcOldFont = pcDC->SelectObject(pcFont);
    cResultSize = pcDC->GetTextExtent(cszText); // dimensions of the text
                                                // at the given surface
                                                // with the given font
    pcDC->SelectObject(pcOldFont);
  }
}

virtual void BeHappy() = 0;

modified on Friday, April 2, 2010 2:12 AM

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