MFC信息管理系统

头文件声明

    bool CheckNumber(LPCTSTR Number);
    void OnBnClickedLoad();
    struct sInfo{
            int nNum;
            TCHAR sName[10];
            int nSala;
            COleDateTime tDate;
    };
    BOOL m_bModified;    

添加信息函数：

void CMFCApplication2Dlg::OnBnClickedAdd()
{
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    CString str;
    GetDlgItemText(IDC_Num, str);
    if (CheckNumber(str))
        return;
    int i = pList->GetItemCount();
    GetDlgItemText(IDC_Num, str);
    pList->InsertItem(i, str);
    GetDlgItemText(IDC_Name, str);
    pList->SetItemText(i, 1, str);
    GetDlgItemText(IDC_Sala, str);
    pList->SetItemText(i, 2, str);
    GetDlgItemText(IDC_Date, str);
    pList->SetItemText(i, 3, str);
    m_bModified = TRUE;

}

添加时查重：

//查重，重复数据不可添加
bool CMFCApplication2Dlg::CheckNumber(LPCTSTR Number)
{
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    int i = 0;
    int nCount = pList->GetItemCount();
    while (i < nCount){
        if (pList->GetItemText(i, 0) == Number){
            MessageBox(_T("信息已存在！"));
            SetFocus();
            return true;
        }
        i++;
    }
    return false;
}

删除：

void CMFCApplication2Dlg::OnBnClickedDel()
{
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    int nSel = pList->GetSelectionMark();
    if (!nSel){
        MessageBox(_T("请选中删除数据！"));
        return;
    }
    else{
        CString str = pList->GetItemText(nSel, 0);
    if (MessageBox(_T("确定删除") + str + _T("吗？"), _T("确认删除"), MB_YESNO) == IDYES)
        pList->DeleteItem(nSel);
    }
    m_bModified = TRUE;
}

修改：

void CMFCApplication2Dlg::OnBnClickedMod()
{
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    if (!pList->GetSelectedCount())
    {
        MessageBox(_T("无选中行！"));
        return;
    }
    POSITION pos = pList->GetFirstSelectedItemPosition();
    int nSel = pList->GetNextSelectedItem(pos);
    CString str = pList->GetItemText(nSel, 0);
    if (MessageBox(_T("确定修改") + str + _T("吗？"), _T("确认修改"), MB_YESNO) == IDYES)
    {
        GetDlgItemText(IDC_Name, str);
        pList->SetItemText(nSel, 1, str);
        GetDlgItemText(IDC_Sala, str);
        pList->SetItemText(nSel, 2, str);
        GetDlgItemText(IDC_Date, str);
        pList->SetItemText(nSel, 3, str);
    }
    m_bModified = TRUE;
}

加载显示：

void CMFCApplication2Dlg::OnBnClickedLoad()
{
    CFile file;
    file.Open(_T("./employee.dat"), CFile::modeRead);
    CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
    sInfo info;
    int i = 0;
    CString str;
    while (file.Read(&info, sizeof(info)) == sizeof(info))
    {
        str.Format(_T("%d"), info.nNum);
        pList->InsertItem(i, str);
        pList->SetItemText(i, 1, info.sName);
        str.Format(_T("%d"), info.nSala);
        pList->SetItemText(i, 2, str);
        str.Format(_T("%d年%d月%d日"), info.tDate.GetYear(), info.tDate.GetMonth(), info.tDate.GetDay());
        pList->SetItemText(i, 3, str);
        ++i;
    }
    
}

保存：

 void CMFCApplication2Dlg::OnBnClickedSave()
{
        CFile file;
        file.Open(_T("./employee.dat"),  CFile::modeCreate | CFile::modeWrite);    
        sInfo info;
        CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST);
        int i = 0, nCount = pList->GetItemCount();

        while (i < nCount){
            info.nNum = _tstoi(pList->GetItemText(i, 0));
            _tcscpy(info.sName, pList->GetItemText(i, 1));
            info.nSala = _tstoi(pList->GetItemText(i, 2));
            info.tDate.ParseDateTime(pList->GetItemText(i, 3), VAR_DATEVALUEONLY);
            int size = sizeof(info);
            file.Write(&info, size);
            i++;
        }
        file.Close();        
        m_bModified = FALSE;
}

保存实现需在 <stdafx.h>中加入  #define _CRT_SECURE_NO_WARNINGS 防止报错。

关闭时提示保存：

void CMFCApplication2Dlg::OnBnClickedCancel()
{
    if (m_bModified == TRUE){
        if (MessageBox(_T("是否保存修改过的数据？"),NULL, MB_YESNO) == IDYES){
            OnBnClickedSave();
        }        
    }
    CDialogEx::OnCancel();
}
用 m_bModified判断是否修改或已保存。