NewLC - File, Streams and Stores - Comments

Re: File, Streams and Stores.URGENT!!!

diya007 — Wed, 19 Nov 2008 14:25:29 +0100

Hi all,

Can anyone guide me to write a function to store persistent data from my application using CPermanentFileStore?

Or is there any other way to "write byte array chunk of size in bytes to persistent store"?

Also where is this persistent data stored by CPermanentFileStore?

Thanx

Re: File, Streams and Stores

pointer_raj — Wed, 01 Oct 2008 06:48:49 +0200

really thats very helpful to beginners like me.
cheers to eric ...

thanks a lot

Re: File, Streams and Stores

3AZZK — Thu, 14 Feb 2008 08:08:41 +0100

It's very helpful, thx

Re: File, Streams and Stores

dlingt — Wed, 05 Dec 2007 09:36:32 +0100

good.... thanks!

Re: File, Streams and Stores

sandeepmhptr — Thu, 23 Aug 2007 08:37:39 +0200

fOLLOWING CODE WORKS FOR STORING AND RETRIEVING InetAddr INTO Stream

InetAddr iIpAddress;
TBuf<30> bufTime;
FOR WRITING TO STREAM
-----------------------------------------

iIpAddress.Output(bufTime);
aStream<

FOR READING FROM STREAM
-------------------------------------------
aStream>>bufTime;
iIpAddress.Input(bufTime);

BUT I DID NOT GET SOLN AS FOR TTime and TTimeIntervalSeconds Objects????????

CAN ANY ONE THROW ANY LIGHT ON IT!!!!!!!!!!!!!!!!!!!!!!

Re: File, Streams and Stores

sandeepmhptr — Wed, 22 Aug 2007 07:52:59 +0200

I found some problem in string and retrieving
TTime iTime;
TTimeIntervalSeconds iTimeOffset;
TTime iDate;
TInetAddr iIpAddress;

objects into stream.

Can anyone tell how to write these objects into stream????????

also TInt objects are not written into Stream -------------------

RWriteStream& aStream;
TInt iColor;
aStream<

and I had to use
RWriteStream& aStream;
TInt iColor;
aStream.WriteInt32L(iColor);

how to read and display .html file

santhosh.ram — Tue, 14 Aug 2007 15:02:51 +0200

am trying to read and display the html file.the below code i have used inside the draw function of view class
RFs fs;
fs.Connect();
RFile file;
_LIT(KFileName,"z:\\system\\apps\\sampleprog\\test.html");
file.Open(fs, KFileName, EFileRead);
TFileText fileText;
fileText.Set(file);

TBuf<256> lineText;
while(fileText.Read(lineText) != KErrEof)
{
CWindowGc& gc = SystemGc();
TRect rect( Rect());

if (lineText.Length() > 0)
{
gc.DrawText(lineText, rect, Rect().Height(), CGraphicsContext::ELeft );
}
else
{
gc.Clear( rect );
}

file.Close();
fs.Close();
}
}
am not getting the output.can any one guide me where iam wrong .

Re: File, Streams and Stores

vin2ktalks — Wed, 13 Sep 2006 10:04:58 +0200

Quote from: arunjith

hi
   _LIT(KFileName1,"D:\\AUTOPRINT.MRK");
   RFileWriter *fileWriter = new (ELeave)RFileWriter();
   fileWriter->Initialize();         // doing fileSession.connect
   fileWriter->ReplaceFile(KFileName1,EFileWrite); // Opening the file in replace mode
   fileWriter->InitializeStream();   // Initializing the write stream or creating the RFileWriteStream from the opened file using RFILE
   iHeader->WriteToFile(fileWriter);   //writing the data to file using write stream
   iJobList->WriteToFile(fileWriter);   //writing the data to file using write stream
//   fileWriter->CommitL();Â Â Â Â Â Â Â Â Â Â Â //Commiting the streM;
//   fileWriter->CloseStream();   Â Â Â    //closing the stream
   fileWriter->Close();
   fileWriter->CloseSession();
   delete fileWriter;

in this code when im trying to close the stream it gives KERN EXEC 0 . and at the asme time if i try to commitL that also ends in panic KERN EXEC 0
if i comment out those 2 lines it works fine . But im supposed 2 close the stream rt

what cud be the problem?

First of all which is this RFileWriter class? And why are you creating the pointer of an RCalss?

More over here I've posted how to use an RClass.

Re: File, Streams and Stores

arunjith — Wed, 13 Sep 2006 09:03:03 +0200

hi
   _LIT(KFileName1,"D:\\AUTOPRINT.MRK");
   RFileWriter *fileWriter = new (ELeave)RFileWriter();
   fileWriter->Initialize();         // doing fileSession.connect
   fileWriter->ReplaceFile(KFileName1,EFileWrite); // Opening the file in replace mode
   fileWriter->InitializeStream();   // Initializing the write stream or creating the RFileWriteStream from the opened file using RFILE
   iHeader->WriteToFile(fileWriter);   //writing the data to file using write stream
   iJobList->WriteToFile(fileWriter);   //writing the data to file using write stream
//   fileWriter->CommitL(); //Commiting the streM;
//   fileWriter->CloseStream();        //closing the stream
   fileWriter->Close();
   fileWriter->CloseSession();
   delete fileWriter;

in this code when im trying to close the stream it gives KERN EXEC 0 . and at the asme time if i try to commitL that also ends in panic KERN EXEC 0
if i comment out those 2 lines it works fine . But im supposed 2 close the stream rt

what cud be the problem?

Re: File, Streams and Stores

selva_rajk — Thu, 31 Aug 2006 10:46:05 +0200

Hi, I am currenly using Rfile to read a file which is created in the desktop and put in the phone. I use Rfile to read the content of the file. Can i jump to store . stream for reading a file or stick with the RFile itself.

Guid me

Re: File, Streams and Stores

thephongisb — Wed, 14 Jun 2006 04:22:52 +0200

A good example for study about write and read from file

http://kerncomputing.blogspot.com/2005/02/symbian-os-using-rfile-to-read-and.html

Stores - CRichText::ExternalizeL(...) does not work

adamhusar — Mon, 17 Apr 2006 10:15:08 +0200

I would like only to add here one thing concerning stores with which i had problems:

CRichText::ExternalizeL(...) does not work !!!

i found lots of posts from people that had problems with this ... and nobody made it work correctly (all the time it throws some undocumented panic which i was not able to find in symbian include headers)

create a new store instead and to save datam fro rich text use

CRichText::StoreL(...)

Re: File, Streams and Stores

NumptyAlert — Thu, 09 Mar 2006 22:12:01 +0100

>> I have just replacedÂ CleanupStackPushL & PopandDestroy statement by a file.close statement at the end ?

But why? What are you hoping to achieve?
If you don't call CleanupClosePushL() and HBufC8::NewLC() leaves then what happens to your file handle?

Re: File, Streams and Stores

neerajgupta — Thu, 09 Mar 2006 11:58:10 +0100

/* Txt file to be opened. */
RFile file ;
file.Open(aFs, aFilename,EFileRead) ;
//////////// CleanupClosePushL(file);

/* Size of file. */
TInt iSize ;
file.Size(iSize) ;

/* Allocate enough memory to read in the whole file. */
HBufC8* buf = HBufC8::NewL(iSize) ;

/* Get a pointer to modify contents of buffer. */
TPtr8 pBuf = buf->Des() ;

/* Read data into buf. */
file.Read(pBuf) ;

////////////CleanupStack::PopAndDestroy( //; // file

file.close();

ls the above program correct? I have just replaced CleanupStackPushL & PopandDestroy statement by a file.close statement at the end ?

Re: File, Streams and Stores

vikas_bansal — Wed, 01 Mar 2006 05:51:24 +0100

that is just typo while posting not in actual code.well thanks for reply

File, Streams and Stores

eric — Fri, 24 Jun 2005 09:43:54 +0200