Save from and load to Array of Struct

If you want to keep these structs containing MFC CStrings, I'm afraid that you'll have to go for the MFC serialization concept...

Hello jkr;

Thanks for that hint.  I just took a quick look at serialization in the help file, and it *couldn't* be more tedious than what I'm currently doing (which is converting to and from a csv format).

If you (or anyone) can provide a sample, the points are yours.

Regards,

Paul

for saving

struct
{
  BOOL b;
  CString s;
} xstr;


xstr x[20];


CFile f;
if( !f.Open( pFileName, CFile::modeCreate | CFile::modeWrite ) ) {
   #ifdef _DEBUG
      afxDump << "Unable to open file" << "\n";
      exit( 1 );
   #endif
}
CArchive ar( &f, CArchive::store);

for (int i=0;i<20;i++)
{
  ar << x[i].b;
  ar << x[i].s
}

f.Close();

for loading

CFile f;
if( !f.Open( pFileName, CFile::modeRead ) ) {
  #ifdef _DEBUG
     afxDump << "Unable to open file" << "\n";
     exit( 1 );
  #endif
}
CArchive ar( &f, CArchive::load);

for (int i=0;i<20;i++)
{
 ar >> x[i].b;
 ar >> x[i].s
}

f.Close();

Or, using std C++ output/input operators:

#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <string>
using namespace std;


struct c
{
     string a, b;
     bool e, f, g;
};

ostream& operator<< (ostream& o, const c& c1)
{
     o << c1.e << " " << c1.f << " " << c1.g << " ";
     o << c1.a.length() << " " << c1.a;
     return o << c1.b.length() << " " << c1.b;
};

istream& operator>> (istream& in, c& c1)
{
     in >> c1.e >> c1.f >> c1.g;

     size_t size;
     char szBuff[100];

     in >> size;
     in.read(szBuff, size);
     c1.a.assign(szBuff, size);

     in >> size;
     in.read(szBuff, size);
     c1.b.assign(szBuff, size);
     // etc
     return in;
};
void main(short ac,char **av)
{
     vector<c> vc;
     fstream f("target.file");
     copy(vc.begin(), vc.end(), ostream_iterator<c>(f, " "));
     vector<c> target;
     while (!f.eof())
     {
          c c1;
          f >> c1;
          target.push_back(c1);
     };
}

I believe for this question, you will have to use the <fstream.h> header file, where you open a file for writing and write the data in the array of structure in the file.
ofstream fout(filename);
fout<<data;
.........
fout.close();
when you want to read from the file,
ifstream fin(filename);
fin>>data;
fin.get(ch);
or
fin.getline(ch, 50, '\n');
anything else, just contact me.

Hello ShaunWilde (and everyone);

I tried your suggestion, modified as follows:

void CLibraryEditView::OnButtonSaveLibrary()
{
     CFile f;

     TCHAR* pFileName = _T("\\My Documents\\Library\\TempLib1.lib");

     if( !f.Open( pFileName, CFile::modeCreate | CFile::modeWrite ) )
     {
          #ifdef _DEBUG
               afxDump << "Unable to open file" << "\n";
               exit( 1 );
          #endif
     }

     CArchive ar ( &f, CArchive::store);
     for (int i=0;i<2;i++)
     {
          ar << m_pPV->m_pLib[i].LibIsotopeName;
          ar << m_pPV->m_pLib[i].LibkeV1;
          ar << m_pPV->m_pLib[i].LibYield1;
          ar << m_pPV->m_pLib[i].LibComment1;
          ar << m_pPV->m_pLib[i].LibPri1;
          ar << m_pPV->m_pLib[i].LibSec1;

          ar << m_pPV->m_pLib[i].LibkeV2;
          ar << m_pPV->m_pLib[i].LibYield2;
          ar << m_pPV->m_pLib[i].LibComment2;
          ar << m_pPV->m_pLib[i].LibPri2;
          ar << m_pPV->m_pLib[i].LibSec2;

          ar << m_pPV->m_pLib[i].LibkeV3;
          ar << m_pPV->m_pLib[i].LibYield3;
          ar << m_pPV->m_pLib[i].LibComment3;
          ar << m_pPV->m_pLib[i].LibPri3;
          ar << m_pPV->m_pLib[i].LibSec3;

          ar << m_pPV->m_pLib[i].LibkeV4;
          ar << m_pPV->m_pLib[i].LibYield4;
          ar << m_pPV->m_pLib[i].LibComment4;
          ar << m_pPV->m_pLib[i].LibPri4;
          ar << m_pPV->m_pLib[i].LibSec4;

          ar << m_pPV->m_pLib[i].LibkeV5;
          ar << m_pPV->m_pLib[i].LibYield5;
          ar << m_pPV->m_pLib[i].LibComment5;
          ar << m_pPV->m_pLib[i].LibPri5;
          ar << m_pPV->m_pLib[i].LibSec5;
     }

     f.Close();
}

It compiles and runs fine, but gives the message "an unnamed file was not found".  A file with the appropriate name is created that contains 0 bytes (but does not overwrite or update if the file already exists).

So close, and yet so far...

Paul

I don't think your program code above wrote anything to the file. Maybe that's why the file you created contains 0 bytes. or, there could be a possibility that the directory of the file is written wrongly. This could also cause such an error. Check your code again.

ShaunWilde;

Thanks for persisting through this.  Well done!

Regards,

Paul

no probs - glad to help