logindialog.cpp

完整的数据库课程设计

// LoginDialog.cpp : implementation file
//

#include "stdafx.h"
#include "chapq2_1.h"
#include "LoginDialog.h"
#include "Public.h"

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

/////////////////////////////////////////////////////////////////////////////
// CLoginDialog dialog


CLoginDialog::CLoginDialog(CWnd* pParent /*=NULL*/)
	: CDialog(CLoginDialog::IDD, pParent)
{
	//{{AFX_DATA_INIT(CLoginDialog)
	m_szLoginName = _T("");
	m_szPassword = _T("");
	//}}AFX_DATA_INIT
}


void CLoginDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CLoginDialog)
	DDX_Text(pDX, IDC_LOGINNAME, m_szLoginName);
	DDX_Text(pDX, IDC_PASSWORD, m_szPassword);
	DDV_MaxChars(pDX, m_szPassword, 5);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CLoginDialog, CDialog)
	//{{AFX_MSG_MAP(CLoginDialog)
	ON_BN_CLICKED(IDC_STUDENT_D, OnStudentD)
	ON_BN_CLICKED(IDC_TEACHER_D, OnTeacherD)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CLoginDialog message handlers
int m_Time=0,m_Count=3;

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

	      int m_i=GetCheckedRadioButton(IDC_STUDENT_D,IDC_TEACHER_D);

      if(!m_i)
	  {
		MessageBox("           请选择登录方式！        ","登录提示！");
		return;
	  }

	UpdateData(TRUE);
	if(m_szLoginName=="user"&&m_szPassword=="12345")
	{
		CDialog::OnOK();
	}

	/*假如用户名或密码错误，且还未超出登陆次数，就进行提示*/
	m_Time++;
    if((m_szLoginName!="user"||m_szPassword!="12345")&&(m_Time<3)) //假如密码和用户名不正确

    {
		m_Count--;
		CString str;
	    str.Format("%d",m_Count);
        MessageBox("用户名或密码不正确\n     您还有"+str+"次尝试","登录提示",MB_OK);
    }
    /*假如超出登陆次数，提示并退出系统*/
    if(m_Time>=3)
    {
        MessageBox("登陆错误次数超过3次","登录提示",MB_OK);
        AfxGetMainWnd()->PostMessage(WM_QUIT);
        CDialog::OnCancel();
   }
	
}

void CLoginDialog::OnCancel() 
{
	// TODO: Add extra cleanup here
	MessageBox("验证失败","登录提示",MB_OK);
	AfxGetMainWnd()->PostMessage(WM_QUIT);

	CDialog::OnCancel();
}

void CLoginDialog::OnStudentD() 
{
	// TODO: Add your control notification handler code here
	CPublic *app = (CPublic *)AfxGetApp();
	app->IS=FALSE;
}

void CLoginDialog::OnTeacherD() 
{
	// TODO: Add your control notification handler code here
	CPublic *app = (CPublic *)AfxGetApp();
	app->IS=TRUE;
}