Symbian: How to write HBufC* to file(转)

http://stackoverflow.com/questions/1311969/symbian-how-to-write-hbufc-to-file

HBufC8* iFileBuffer = HBufC8::NewL(20000);
TPtr8 ptr(iFileBuffer->Des());

fp.Seek(ESeekStart,pos);

Err = fp.Read(ptr);

while(!Err && ptr.Length()>0)
{
Err = fp.Read(ptr);
Printf(_L("Data read: %d \n\n"), ptr.Length());
}

fp.Create(iFileServer,_L("C:\\testfile.txt"), EFileWrite);

fp.Seek(ESeekEnd,pos);

fp.Write(*iFileBuffer);
fp.Close();

delete(iFileBuffer);