C / C++ / MFC

Re: Reading from a text file using MFC

13-Dec-07 0:42

CStdioFile::ReadString
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.

Johpoke13-Dec-07 0:53

Johpoke

13-Dec-07 0:53

http://www.codeproject.com/file/importstringvalues.asp[^]

//Johannes

Re: Reading from a text file using MFC

Derick Magagula13-Dec-07 1:24

Derick Magagula

13-Dec-07 1:24

Thanks Johpoke it worked, and thanks to the other guys too for their responses. Laugh | :laugh:

conversion from hex to Readable format

Chandrasekharan P12-Dec-07 23:43

12-Dec-07 23:43

i have a file which contains hex values. i want to convert that to human readable form. please give me some leads.

rajneshmalik13-Dec-07 0:09

rajneshmalik

13-Dec-07 0:09

try itoa function for more help LOOK MSDN

CPallini13-Dec-07 0:33

13-Dec-07 0:33

Chandrasekharanp wrote:
i have a file which contains hex values. i want to convert that to human readable form. please give me some leads

hex format is human readable. Do you mean a binary file (as opposite to text one)?

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.

Chandrasekharan P13-Dec-07 0:35

13-Dec-07 0:35

ya right... i am sorry for the wrong query.. i need to read it from a file and convert that to ascii and then print it to another file.

CPallini13-Dec-07 0:58

13-Dec-07 0:58

Oh,that's not difficult, for instance:
Supposing ANSI build and error handling left to the reader

FILE * fpin = fopen("MyBinaryFile.foo","rb");
FILE * fpout = fopen("MytextFile.txt","w");
int c;
int count = 0;
while ( (c=getc(fpin)) != EOF )
{
  fprintf(fpout, "%02x ", c);
  if (count % 16 == 15)   fprintf(fpout, "\n");
  count++;
}
fclose(fpin);
fclose(fpout);

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.

Chandrasekharan P13-Dec-07 1:22

13-Dec-07 1:22

thanks GURU!!!!!!

You're welcome

CPallini13-Dec-07 1:55

13-Dec-07 1:55

Chandrasekharanp wrote:
thanks GURU!!!!!!

Oh, I'm not.

Anyway, you're welcome.
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.

Convert char* to CString

rajanponnalagu12-Dec-07 23:39

rajanponnalagu

12-Dec-07 23:39

Hello,

I have one structure contains char * variable. I want to store the CString data to char* variable.

struct _iobuf {
char *_ptr;
int _cnt;
char *_base;
int _flag;
int _file;
int _charbuf;
int _bufsiz;
char *_tmpfname;
};

I have one CString variable like m_Username. I want to store m_Username to char *_base.

Could you please help me how to do.

Sunil Shindekar12-Dec-07 23:51

Sunil Shindekar

12-Dec-07 23:51

_base = m_userName.GetBuffer

or
_base = new char[]
strcpy(_base, m_userName.getbuffer)

rajanponnalagu13-Dec-07 0:08

rajanponnalagu

13-Dec-07 0:08

struct _iobuf {
char *_ptr;
int _cnt;
char *_base;
int _flag;
int _file;
int _charbuf;
int _bufsiz;
char *_tmpfname;
};
typedef struct _iobuf FILE;

FILE *fleCredentials;

fleCredentials = fopen("credentials.crd", "a+");
fprintf(fleCredentials, "%s ",(LPCTSTR)m_Username );

Problem:
========
Only one character of "m_Username" has to be stored in the "credentials.crd". I would like to store the fullname into the file.

Help to proceed further.

CPallini13-Dec-07 0:11

13-Dec-07 0:11

Sunil Shindekar wrote:
_base = m_userName.GetBuffer

The above is a mistake, because, unless you want to lock the CString internal buffer forever, then you have to call ReleaseBuffer method, afterwards the _base pointer becomes garbage, please read documentation http://msdn2.microsoft.com/en-us/library/kt26tkzx(VS.71).aspx[^].

Sunil Shindekar wrote:
_base = new char[]
strcpy(_base, m_userName.getbuffer)

Better, but still mistakes. You don't need at all GetBuffer, to do this (and you aren't calling ReleaseBuffer afterwards), the LPCTSTR cast operator is enough.
Furthermore you don't specify character array size.
And, finally, you're supposing that it is an ANSI build.

Is It enough?

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.

CPallini13-Dec-07 0:29

13-Dec-07 0:29

Provided it is an ANSI (not UNICODE build, you can
do:

CString strFoo("foo");
struct _iobuf iobuf;

iobuf._ptr = new[strFoo.GetLenght()+1];
if (iobuf._ptr)
{
 strcpy(iobuf._ptr, strFoo);
}
...
...

// don't forget to delete the buffer
if (iobuf._ptr)
{
  delete [] iobuf._ptr;
}

However, I suggest, if you can, to refactor a bit you project (i.e. avoiding such a mixing of string classes and character arrays.

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.

How to get text from a text box control pertaining to cursor position

KarstenK13-Dec-07 2:20

KarstenK

13-Dec-07 2:20

I think it is an interface so he had to do such crappy things. But interface should have the buffer, because it wants the data, and knows when to release the memory to avoid leaks. Unsure | :~

Greetings from Germany

Temp folder path

neha.agarwal2712-Dec-07 23:11

neha.agarwal27

12-Dec-07 23:11

Hi all,

Can anybody tell me how can i get temp folder path.

Thanks in advance

Re: Temp folder path

toxcct12-Dec-07 23:24

toxcct

12-Dec-07 23:24

SHGetSpecialFolder()

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Re: Temp folder path

ThatsAlok12-Dec-07 23:36

ThatsAlok

12-Dec-07 23:36

neha.agarwal27 wrote:
Can anybody tell me how can i get temp folder path

GetTempPath

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Re: Temp folder path

Johpoke13-Dec-07 0:55

Johpoke

13-Dec-07 0:55

Or,

getenv("TEMP");

(type set in cmd for more vars)

//Johannes

AmarjeetSinghMatharu12-Dec-07 22:52

AmarjeetSinghMatharu

12-Dec-07 22:52

Hello All,
I am changing the cursor position for inserting,updating and deleting the text in a text box control.
I am able to get the cursor position pertaining to the current cursor location though.

Please suggest me the way to find the text pertaining to the cursor.

Thanks and Regards.
Amar.

Re: How to get text from a text box control pertaining to cursor position

Nelek13-Dec-07 0:46

Nelek

13-Dec-07 0:46

From VC++ Help:

<br />
CEditView::GetSelectedText <br />
void GetSelectedText( CString& strResult ) const;<br />
<br />
Parameters<br />
strResult: A reference to the CString object that is to receive the selected text.<br />
<br />
Remarks<br />
Call GetSelectedText to copy the selected text into a CString object, up to the end of the selection or the character preceding the first carriage-return character in the selection.<br />

A tip... Try checking the help. Go to index view, write the name of the control and at the bottom of the help text usually is "CLASS MEMBERS" link. With all the possible things you can do by default with that control/class.

Greetings.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
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Bad handshake in machine<-->PC communication

__yash__12-Dec-07 21:49

__yash__

12-Dec-07 21:49

Friends,
I wanted to know your suggestions on the following:
There is an MFC application with TCP/IP connections(CAsyncSocket) to connect to machines that send out a string when the user presses a button there.
Now what do you think is the probablity(Yes/No/%) that the string is not received by the software when they are connected on LAN??
Or
Is it that there is absolutely no chance of missing(I dont think so though)

Assumptions:
Physical connections, cabling are proper and never break.

Re: Bad handshake in machine<-->PC communication

David Crow13-Dec-07 4:23

David Crow

13-Dec-07 4:23

yashveer wrote:
Now what do you think is the probablity(Yes/No/%) that the string is not received by the software when they are connected on LAN??

The target machine will either receive the data or it won't.

yashveer wrote:
Is it that there is absolutely no chance of missing(I dont think so though)

There's always the possibility that the target machine could not receive the data.

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Difference in OS

Chandrasekharan P12-Dec-07 21:22