fileexamdlg.cpp

WinCE下evc实现文件的写入和读取

// FileExamDlg.cpp : implementation file
//

#include "stdafx.h"
#include "FileExam.h"
#include "FileExamDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CFileExamDlg dialog

CFileExamDlg::CFileExamDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFileExamDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFileExamDlg)
	m_xsxm = _T("");
	m_xsxb = _T("");
	m_csrq = _T("");
	m_bjmc = _T("");
	m_xsbh = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CFileExamDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFileExamDlg)
	DDX_Text(pDX, IDC_EDTXSXM, m_xsxm);
	DDX_CBString(pDX, IDC_CMBXSXB, m_xsxb);
	DDX_Text(pDX, IDC_EDTCSRQ, m_csrq);
	DDX_Text(pDX, IDC_EDTBJMC, m_bjmc);
	DDX_Text(pDX, IDC_EDTXSBH, m_xsbh);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFileExamDlg, CDialog)
	//{{AFX_MSG_MAP(CFileExamDlg)
	ON_BN_CLICKED(IDC_BTNFIRST, OnBtnfirst)
	ON_BN_CLICKED(IDC_BTNPRIOR, OnBtnprior)
	ON_BN_CLICKED(IDC_BTNNEXT, OnBtnnext)
	ON_BN_CLICKED(IDC_BTNLAST, OnBtnlast)
	ON_BN_CLICKED(IDC_BTNADD, OnBtnadd)
	ON_BN_CLICKED(IDC_BTNEDIT, OnBtnedit)
	ON_BN_CLICKED(IDC_BTNCANCEL, OnBtncancel)
	ON_BN_CLICKED(IDC_BTNSAVE, OnBtnsave)
	ON_BN_CLICKED(IDC_BTNDELETE, OnBtndelete)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFileExamDlg message handlers

BOOL CFileExamDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	// TODO: Add extra initialization here
	
    CFile stuFile;
	CStudentData studentData;
	DWORD dwRead;
	ZeroMemory(&studentData,sizeof(studentData));
	if(stuFile.Open(STUDENTFILEPATH,CFile::modeRead))
	{
		do
		{
            dwRead=stuFile.Read(&studentData,sizeof(studentData));
			if(dwRead!=0)
			{
				m_lstStudent.AddTail(studentData);
			}
			}while(dwRead>0);

			stuFile.Close();
		
	}
     else
	 {
		 if(!stuFile.Open(STUDENTFILEPATH,CFile::modeCreate| CFile::modeWrite))
         {
			 AfxMessageBox(_T("Create Error"));
			 return FALSE;
		 }
		 stuFile.Close();
	 }

	 if(m_lstStudent.GetCount()>0)
	 {
		 studentData=m_lstStudent.GetHead();
		 m_iCurPos=0;
		 
		 m_xsbh=studentData.xsbh;
		 m_xsxm=studentData.xsxm;
		 m_xsxb=studentData.xb;
		 m_csrq=studentData.csrq;
		 m_bjmc=studentData.bjmc;
		 UpdateData(FALSE);
	 }

     SetControlEnable(FALSE);

	 SetNavigatorButton(m_iCurPos);
	return TRUE;  // return TRUE  unless you set the focus to a control
}



void CFileExamDlg::SetControlEnable(bool aValue)
{
     ((CEdit*)GetDlgItem(IDC_EDTXSBH))->EnableWindow(aValue);
     ((CEdit*)GetDlgItem(IDC_EDTXSXM))->EnableWindow(aValue);
     ((CEdit*)GetDlgItem(IDC_CMBXSXB))->EnableWindow(aValue);
     ((CEdit*)GetDlgItem(IDC_EDTCSRQ))->EnableWindow(aValue);
     ((CEdit*)GetDlgItem(IDC_EDTBJMC))->EnableWindow(aValue);

	 ((CButton*)GetDlgItem(IDC_BTNFIRST))->EnableWindow(!aValue);
     ((CButton*)GetDlgItem(IDC_BTNPRIOR))->EnableWindow(!aValue);
	 ((CButton*)GetDlgItem(IDC_BTNNEXT))->EnableWindow(!aValue);
	 ((CButton*)GetDlgItem(IDC_BTNLAST))->EnableWindow(!aValue);

	 ((CButton*)GetDlgItem(IDC_BTNADD))->EnableWindow(!aValue);
	 ((CButton*)GetDlgItem(IDC_BTNEDIT))->EnableWindow(!aValue);
	 ((CButton*)GetDlgItem(IDC_BTNCANCEL))->EnableWindow(!aValue);
	 ((CButton*)GetDlgItem(IDC_BTNDELETE))->EnableWindow(!aValue);
} 

void CFileExamDlg::SetNavigatorButton(int aValue)
{
     if(m_lstStudent.GetCount()<2)
	 {
		((CButton*)GetDlgItem(IDC_BTNFIRST))->EnableWindow(FALSE);
		 ((CButton*)GetDlgItem(IDC_BTNPRIOR))->EnableWindow(FALSE);
		((CButton*)GetDlgItem(IDC_BTNNEXT))->EnableWindow(FALSE);
		((CButton*)GetDlgItem(IDC_BTNLAST))->EnableWindow(FALSE);
	 }
	 if(aValue==0)
	 {
	 	 ((CButton*)GetDlgItem(IDC_BTNFIRST))->EnableWindow(FALSE);
		 ((CButton*)GetDlgItem(IDC_BTNPRIOR))->EnableWindow(FALSE);
		 if(m_lstStudent.GetCount()>=2)
		 {
		 ((CButton*)GetDlgItem(IDC_BTNNEXT))->EnableWindow(TRUE);
		 ((CButton*)GetDlgItem(IDC_BTNLAST))->EnableWindow(TRUE);
		 }
	 }
	 else if(aValue==m_lstStudent.GetCount()-1)
	 {
         ((CButton*)GetDlgItem(IDC_BTNNEXT))->EnableWindow(FALSE);
		 ((CButton*)GetDlgItem(IDC_BTNLAST))->EnableWindow(FALSE);
		 if(m_lstStudent.GetCount()>=2)
		 {
		 ((CButton*)GetDlgItem(IDC_BTNFIRST))->EnableWindow(TRUE);
		 ((CButton*)GetDlgItem(IDC_BTNPRIOR))->EnableWindow(TRUE);
		 }
		 else
		 {
		 ((CButton*)GetDlgItem(IDC_BTNFIRST))->EnableWindow(TRUE);
		 ((CButton*)GetDlgItem(IDC_BTNPRIOR))->EnableWindow(TRUE);
		 ((CButton*)GetDlgItem(IDC_BTNNEXT))->EnableWindow(TRUE);
		 ((CButton*)GetDlgItem(IDC_BTNLAST))->EnableWindow(TRUE);
		 }
	 }
}

void CFileExamDlg::OnBtnfirst() 
{
	// TODO: Add your control notification handler code here
	CStudentData studentData=m_lstStudent.GetHead();
    m_iCurPos=0;

	m_xsbh=studentData.xsbh;
    m_xsxm=studentData.xsxm;
	m_xsxb=studentData.xb;
	m_csrq=studentData.csrq;
	m_bjmc=studentData.bjmc;
	UpdateData(FALSE);

	SetNavigatorButton(m_iCurPos);
}

void CFileExamDlg::OnBtnprior() 
{
	// TODO: Add your control notification handler code here
	m_iCurPos--;
	POSITION pos=m_lstStudent.FindIndex(m_iCurPos);
	CStudentData studentData=m_lstStudent.GetAt(pos);

	m_xsbh=studentData.xsbh;
	m_xsxm=studentData.xsxm;
	m_xsxb=studentData.xb;
	m_csrq=studentData.csrq;
	m_bjmc=studentData.bjmc;
	UpdateData(FALSE);

	SetNavigatorButton(m_iCurPos);

}

void CFileExamDlg::OnBtnnext() 
{
	// TODO: Add your control notification handler code here
	m_iCurPos++;
	POSITION pos=m_lstStudent.FindIndex(m_iCurPos);
	CStudentData studentData=m_lstStudent.GetAt(pos);

	m_xsbh=studentData.xsbh;
	m_xsxm=studentData.xsxm;
	m_xsxb=studentData.xb;
	m_csrq=studentData.csrq;
	m_bjmc=studentData.bjmc;
	UpdateData(FALSE);

	SetNavigatorButton(m_iCurPos);
	
}

void CFileExamDlg::OnBtnlast() 
{
	// TODO: Add your control notification handler code here
	CStudentData studentData=m_lstStudent.GetTail();
	m_iCurPos=m_lstStudent.GetCount()-1;

	m_xsbh=studentData.xsbh;
	m_xsxm=studentData.xsxm;
	m_xsxb=studentData.xb;
	m_csrq=studentData.csrq;
	m_bjmc=studentData.bjmc;
	UpdateData(FALSE);
	
}

void CFileExamDlg::OnBtnadd() 
{
	// TODO: Add your control notification handler code here
	m_openID=0;
	m_xsbh=_T("");
	m_xsxm=_T("");
	m_xsxb=_T("");
	m_csrq=_T("");
	m_bjmc=_T("");
	UpdateData(FALSE);
	SetControlEnable(TRUE);
}

void CFileExamDlg::OnBtnedit() 
{
	// TODO: Add your control notification handler code here
	if(m_lstStudent.IsEmpty())
	{
        AfxMessageBox(_T("NoTEXT"));
		return;
	}
	m_openID=1;
	SetControlEnable(TRUE);

}

void CFileExamDlg::OnBtncancel() 
{
	// TODO: Add your control notification handler code here
	POSITION pos=m_lstStudent.FindIndex(m_iCurPos);
	CStudentData studentData=m_lstStudent.GetAt(pos);

	m_xsbh=studentData.xsbh;
	m_xsxm=studentData.xsxm;
	m_xsxb=studentData.xb;
	m_csrq=studentData.csrq;
	m_bjmc=studentData.bjmc;
   
	UpdateData(FALSE);

	SetNavigatorButton(m_iCurPos);
}

void CFileExamDlg::OnBtnsave() 
{
	// TODO: Add your control notification handler code here
	CStudentData studentData;
	CFile  stuFile;
    
	UpdateData(TRUE);

	switch(m_openID)
	{
	case 0:
		{
			ZeroMemory(&studentData,sizeof(studentData));
			wcscpy(studentData.xsbh,m_xsbh);
			wcscpy(studentData.xsxm,m_xsxm);
			wcscpy(studentData.xb,m_xsxb);
			wcscpy(studentData.csrq,m_csrq);
			wcscpy(studentData.bjmc,m_bjmc);
			stuFile.Open(STUDENTFILEPATH,CFile::modeRead | CFile::modeWrite);
			stuFile.SeekToEnd();
			stuFile.Write(&studentData,sizeof(studentData));
			stuFile.Close();

			m_lstStudent.AddTail(studentData);

			SetControlEnable(FALSE);

			m_iCurPos=m_lstStudent.GetCount()-1;
			SetNavigatorButton(m_iCurPos);
			break;
		} 
	case 1:
		{
			ZeroMemory(&studentData,sizeof(studentData));
			wcscpy(studentData.xsbh,m_xsbh);
			wcscpy(studentData.xsxm,m_xsxm);
			wcscpy(studentData.xb,m_xsxb);
			wcscpy(studentData.csrq,m_csrq);
			wcscpy(studentData.bjmc,m_bjmc);
			stuFile.Open(STUDENTFILEPATH,CFile::modeRead | CFile::modeWrite);
			stuFile.Seek(sizeof(studentData)*(m_iCurPos),CFile::begin);
			stuFile.Write(&studentData,sizeof(studentData));
			stuFile.Close();

			m_lstStudent.SetAt(m_lstStudent.FindIndex(m_iCurPos),studentData);

			SetControlEnable(FALSE);

			SetNavigatorButton(m_iCurPos);
			break;


		}
	}
}

void CFileExamDlg::OnBtndelete() 
{
	// TODO: Add your control notification handler code here
	if(m_lstStudent.IsEmpty())
	{
		AfxMessageBox(_T("NoText"));
		return;
	}

	POSITION pos=m_lstStudent.FindIndex(m_iCurPos);
	m_lstStudent.RemoveAt(pos);

	if(m_iCurPos!=0)
	{
		m_iCurPos--;
	}
    

	if(!m_lstStudent.IsEmpty())
	{
		pos=m_lstStudent.FindIndex(m_iCurPos);
		CStudentData studentData=m_lstStudent.GetAt(pos);

		m_xsbh=studentData.xsbh;
		m_xsxm=studentData.xsxm;
		m_xsxb=studentData.xb;
		m_csrq=studentData.csrq;
		m_bjmc=studentData.bjmc;
		
		UpdateData(FALSE);
    }
	else
	{
		m_xsbh=_T("");
		m_xsxm=_T("");
		m_xsxb=_T("");
		m_csrq=_T("");
		m_bjmc=_T("");
		UpdateData(FALSE);
	}

	SetControlEnable(FALSE);

	SetNavigatorButton(m_iCurPos);
    
	CStudentData studentData;
	CFile stuFile;
	stuFile.Open(STUDENTFILEPATH,CFile::modeCreate|CFile::modeWrite);

	pos=m_lstStudent.GetHeadPosition();
	for(int i=0;i<m_lstStudent.GetCount();i++)
	{
		ZeroMemory(&studentData,sizeof(studentData));
		studentData=m_lstStudent.GetNext(pos);
		stuFile.Write(&studentData,sizeof(studentData));
	}

    stuFile.Close();
}