trouble reading in serialized list structures

[itsh11]

Hello everyone,

I am trying to read in a list structure which is serialized as

m_DataPointerList.Serialize( ar );

where m_DataPointerList is defined as :

CTypedPtrList<CObList,CDataPointer*> m_DataPointerList;

and class CDataPointer is declared as:

class CDataPointer : public CObject
{
public:
CDataPointer();

protected:
DECLARE_SERIAL(CDataPointer)

protected:

public:
unsigned long Time; unsigned char Channel;
unsigned char Rate;

public:
virtual void Serialize(CArchive& ar);
};

and defined as:

IMPLEMENT_SERIAL(CDataPointer, CObject, 1)
CDataPointer::CDataPointer()
{

}

void CDataPointer::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
ar << Time;
ar << Channel;
ar << Rate;
}
else
{
ar >> Time;
ar >> Channel;
ar >> Rate;
}
}

I am having some difficulties( i donno why?) in reading it in using the same serializing command ie:

m_DataPointerList.Serialize( ar );

is there any thing i am overlooking while i am doing this??

on the other hand,
I try to read this using a 'for' loop
which iterates for the number of occurances of CDataPointer. but i have to add an offset at the end of every iteration if I were to read the next iteration correctly.
something like

nDataCounter=ar.ReadCount();
for(i=0;i < nDataCounter;i++)
{
ar>>Time;
ar>>Channel;
ar>>Rate;

ar.Flush();
pFile->Seek(offSET, CFile::current);
}

i dont understand why i have to provide this offset.and i have trouble choosing the correct offSET as it varies for different lists. again is there something i am doing wrong ?

Can please you give me some insight into these two issues??

Thanks a lot