MFC how to get CString from another Class to CRegSettings class - c++

Question

I have a problem about save Edit text to registy.
I did in main class save to registy text data and i did another registry class that call
CRegSettings so this class doing enum each time when i clicked button like
MyItem\0, MyItem\1.
my problem is i cant get that CString text into this CRegSettings class, this class doesnt have DoDataExchange so when i did it somehow its turn to error "CMySettingsItem::DoDataExchange' : recursive on all control paths" so it's doesnt work and i cant get CString from main class to this class, does anyone know how to do it ? Thanks.
Here is my codes.
Main.cpp
// CNewConnectionDlg dialog
IMPLEMENT_DYNAMIC(CNewConnectionDlg, CDialog)
CNewConnectionDlg::CNewConnectionDlg(CWnd* pParent /*=NULL*/)
: CDialog(CNewConnectionDlg::IDD, pParent)
, m_csIp(_T("localhost"))
, m_csPort(_T("22"))
, m_csUsername(_T("Username"))
, m_csPassword(_T("Password"))
{
}
class CMySettingsItem : public CRegSettings
{
public:
DWORD Id;
CString m_Password;
CString Password;
BEGIN_REG_MAP(CMySettingsItem)
REG_ITEM(Id, 1)
REG_ITEM(Password, m_Password)
END_REG_MAP()
protected:
virtual void DoDataExchange(CDataExchange* pDX);
};
// Sample application configuration
class CMySettings : public CRegSettings
{
public:
DWORD RootId; // DWORD option
CString RootName; // String option
std::string FullName;
// list of options (CMySettingsItem)
CSimpleArray<CMySettingsItem> Profile; // ATL CSimpleArray
//std::list<CMySettingsItem> ProfileList; // STL list
CMySettingsItem SubItem; // Subitem test
BEGIN_REG_MAP(CMySettings)
REG_ITEM(RootId, 1)
REG_ITEM(RootName, "Profile")
REG_ITEM_STL(FullName, "Profile")
REG_ITEM_SIMPLE_ARRAY(Profile)
//REG_ITEM_LIST(ProfileList)
END_REG_MAP()
};
void CMySettingsItem::DoDataExchange(CDataExchange* pDX)
{
CMySettingsItem::DoDataExchange(pDX);
DDX_Text(pDX, IDC_PASSWORD, m_Password);
}
CNewConnectionDlg::~CNewConnectionDlg()
{
AfxGetApp()->WriteProfileString("Settings", "UserName", m_csUsername);
AfxGetApp()->WriteProfileString("Settings", "IP", m_csIp);
AfxGetApp()->WriteProfileString("Settings", "Port", m_csPort);
AfxGetApp()->WriteProfileString("Settings", "Password", m_csPassword);
CMySettings configuration(HKEY_CURRENT_USER, "Software\\MyItem\\Item");
// Load configuration
if(configuration.Load() != ERROR_SUCCESS)
printf("failed to load\n");
// Use loaded configuration
configuration.RootId++;
CMySettingsItem item;
item.Id = configuration.RootId;
configuration.Profile.Add(item); // CSimpleArray
//configuration.ProfileList.push_back(item); // list
// Save new configuration
if(configuration.Save() != ERROR_SUCCESS)
printf("failed to save\n");
}
void CNewConnectionDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
DDX_Text(pDX, IDC_IP, m_csIp);
DDV_MaxChars(pDX, m_csIp, 255);
DDX_Text(pDX, IDC_PORT, m_csPort);
DDV_MaxChars(pDX, m_csPort, 6);
DDX_Text(pDX, IDC_USERNAME, m_csUsername);
DDV_MaxChars(pDX, m_csUsername, 20);
DDX_Text(pDX, IDC_PASSWORD, m_csPassword);
DDV_MaxChars(pDX, m_csPassword, 255);
}
BEGIN_MESSAGE_MAP(CNewConnectionDlg, CDialog)
ON_EN_CHANGE(IDC_PASSWORD, &CNewConnectionDlg::OnEnChangePassword)
ON_EN_CHANGE(IDC_USERNAME, &CNewConnectionDlg::OnEnChangeUsername)
END_MESSAGE_MAP()
void CNewConnectionDlg::OnEnChangePassword()
{
}
void CNewConnectionDlg::OnEnChangeUsername()
{
}
And Header
Main.h
#pragma once
#include "InnerDlg.h"
#include <afxtempl.h>
class CNewConnectionDlg : public CDialog
{
DECLARE_DYNAMIC(CNewConnectionDlg)
public:
CNewConnectionDlg(CWnd* pParent = NULL); // standard constructor
virtual ~CNewConnectionDlg();
CNewConnectionDlg(const CString sSection, const CString sArrayName);
// Dialog Data
enum { IDD = IDD_NEWCONNECTION };
public:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
protected:
DECLARE_MESSAGE_MAP()
public:
// The server ip or name
CString m_csIp;
// The negotiating port on the server
CString m_csPort;
// Username for the server
CString m_csUsername;
// Password for the server
CString m_csPassword;
afx_msg void OnEnChangePassword();
afx_msg void OnEnChangeUsername();
};

Answer 1

DoDataExchange is only intended for user interface classes, such as your CDialog-based class. It is used to connect the user interface elements on screen with the member variables of that object. So your data is sitting in the m_csIp, m_csPort, m_csUsername, and m_csPassword members. You just need to assign it to the relevant member of your CMySettingsItem instance.
For example:
item.m_Password = m_csPassword;