logindlg.cpp

vc编程实现bp神经网络

// LoginDlg.cpp : implementation file
//

#include "stdafx.h"
#include "optsoftware.h"
#include "LoginDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CLoginDlg dialog


CLoginDlg::CLoginDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CLoginDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CLoginDlg)
	m_password = _T("");
	m_username = _T("");
	count=0;
	//}}AFX_DATA_INIT
}


void CLoginDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CLoginDlg)
	DDX_Text(pDX, IDC_PASSWORD, m_password);
	DDX_Text(pDX, IDC_USERNAME, m_username);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CLoginDlg, CDialog)
	//{{AFX_MSG_MAP(CLoginDlg)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

CDaoDatabase *m_database;
CDaoRecordset *m_recordset;
CString username;
/////////////////////////////////////////////////////////////////////////////
// CLoginDlg message handlers

void CLoginDlg::OnOK() 
{
	// TODO: Add extra validation here

	if(!m_database->IsOpen()) return;
	if(!m_recordset) return;
	if(m_recordset->IsOpen()) m_recordset->Close();
	 
	CString strSQL;
	UpdateData(true);
	strSQL.Format ("select * from tab_UserInfo where Us_name='%s' ",m_username);
	m_recordset->Open (dbOpenDynaset,strSQL);
	if(m_recordset->GetRecordCount ()==0){
		if(count<3){			
			MessageBox("此用户名不存在！");
			count++;
		}
		else{
			 MessageBox("您已经超过三次登录！感谢您的使用！");
			 CDialog::OnOK();
		}
	}
	else
	{
		COleVariant var;
		m_recordset->GetFieldValue(2,var);
		CString str;
		str=(LPCTSTR)var.bstrVal;
     		 if(str!=m_password){
			 if(count<3){
				 MessageBox("密码错误！");
			     count++;
			 }
             else{
				 MessageBox("您已经超过三次登录！感谢您的使用！");
			     CDialog::OnOK();
			 }
		 }
		 else{
			  MessageBox("欢迎使用本软件！");
			  username=m_username;
			  CDialog::OnOK();
		 }
	}
//	CDialog::OnOK();
}