在MFC中将类串行化存储

#pragma once
class CMyData : public CObject
{
public:
CPoint pt;
int  m_iData;
char buff[10];
public:
DECLARE_SERIAL(CMyData)//必须声明此宏
CMyData(){}

CMyData(int nData, CPoint pt1)
{
m_iData = nData;
pt = pt1;
}
virtual void Serialize(CArchive& ar);
};

#include "stdafx.h"
#include "mytest.h"

IMPLEMENT_SERIAL(CMyData, CObject, 1)//必须包含此宏

void CMyData::Serialize(CArchive& ar)
{
CObject::Serialize(ar);

if (ar.IsStoring())
{
ar << pt << m_iData;
ar.Write(buff[i],10);
}
else
{
ar >> pt >> m_iData;
ar.Read(buff[i],10);
}
}

//写入内容
CMyData  d(12,CPoint(1,8));
CFile file(_T("1.txt"), CFile::modeCreate | CFile::modeWrite);
//串行化，存储
CArchive ar(&file, CArchive::store);
ar.WriteCount(1);  //写入对象个数
ar.WriteObject(&d);//写入对象
ar.Close();
file.Close();
//读取内容
CFile mFile;
if (mFile.Open(_T("1.txt"), CFile::modeRead) == 0)
return 0;
char buf[512];
CArchive ar(&mFile, CArchive::load);
unsigned long length = ar.ReadCount();//按写入顺序,读取存储的数据单元个数
CMyData * pData;
for (int i = 0; i < length; i++)
{
//读取一个类信息，同时指针移动到下一个类信息开始
pData = (CMyData *)ar.ReadObject(RUNTIME_CLASS(CMyData));
cout << pData->m_iData << endl;
cout <<"x="<< pData->pt.x << " y=" << pData->pt.y << endl;
}
ar.Close();
mFile.Close();