mfc学生成绩管理系统c++具有查询录入保存删除修改功能代码

以下是一个简单的 MFC 学生成绩管理系统的代码：

头文件 Student.h：

#pragma once

#include <string>

class Student
{
public:
    Student();
    Student(std::string name, int score);

    void setName(std::string name);
    void setScore(int score);

    std::string getName() const;
    int getScore() const;

private:
    std::string m_name;
    int m_score;
};

源文件 Student.cpp：

#include "Student.h"

Student::Student() : m_name(""), m_score(0)
{
}

Student::Student(std::string name, int score) : m_name(name), m_score(score)
{
}

void Student::setName(std::string name)
{
    m_name = name;
}

void Student::setScore(int score)
{
    m_score = score;
}

std::string Student::getName() const
{
    return m_name;
}

int Student::getScore() const
{
    return m_score;
}

头文件 StudentMgr.h：

#pragma once

#include <vector>
#include "Student.h"

class StudentMgr
{
public:
    void addStudent(Student student);
    void removeStudent(int index);
    void updateStudent(int index, Student student);
    Student getStudent(int index) const;
    int getNumStudents() const;

private:
    std::vector<Student> m_students;
};

源文件 StudentMgr.cpp：

#include "StudentMgr.h"

void StudentMgr::addStudent(Student student)
{
    m_students.push_back(student);
}

void StudentMgr::removeStudent(int index)
{
    m_students.erase(m_students.begin() + index);
}

void StudentMgr::updateStudent(int index, Student student)
{
    m_students[index] = student;
}

Student StudentMgr::getStudent(int index) const
{
    return m_students[index];
}

int StudentMgr::getNumStudents() const
{
    return m_students.size();
}

对话框类 CMyDlg：

class CMyDlg : public CDialogEx
{
public:
    CMyDlg(CWnd* pParent = nullptr);

#ifdef AFX_DESIGN_TIME
    enum { IDD = IDD_MY_DIALOG };
#endif

protected:
    virtual void DoDataExchange(CDataExchange* pDX);

protected:
    HICON m_hIcon;

    CString m_name;
    int m_score;
    StudentMgr m_studentMgr;

    virtual BOOL OnInitDialog();
    afx_msg void OnPaint();
    afx_msg HCURSOR OnQueryDragIcon();
    DECLARE_MESSAGE_MAP()

private:
    void updateListCtrl();
};

CMyDlg::CMyDlg(CWnd* pParent /*=nullptr*/)
    : CDialogEx(IDD_MY_DIALOG, pParent)
    , m_name(_T(""))
    , m_score(0)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Text(pDX, IDC_NAME, m_name);
    DDX_Text(pDX, IDC_SCORE, m_score);
}

BEGIN_MESSAGE_MAP(CMyDlg, CDialogEx)
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    //{{AFX_MSG_MAP(CMyDlg)
    ON_BN_CLICKED(IDC_ADD, &CMyDlg::OnBnClickedAdd)
    ON_BN_CLICKED(IDC_DELETE, &CMyDlg::OnBnClickedDelete)
    ON_BN_CLICKED(IDC_UPDATE, &CMyDlg::OnBnClickedUpdate)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CMyDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    SetIcon(m_hIcon, TRUE);
    SetIcon(m_hIcon, FALSE);

    CListCtrl* pListCtrl = (CListCtrl*)GetDlgItem(IDC_LIST);
    pListCtrl->InsertColumn(0, _T("Name"), LVCFMT_LEFT, 100);
    pListCtrl->InsertColumn(1, _T("Score"), LVCFMT_LEFT, 100);

    return TRUE;
}

void CMyDlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this);

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

        int cxIcon = GetSystemMetrics(SM_CXICON);
        int cyIcon = GetSystemMetrics(SM_CYICON);

        CRect rect;
        GetClientRect(&rect);

        int x = (rect.Width() - cxIcon + 1) / 2;
        int y = (rect.Height() - cyIcon + 1) / 2;

        dc.DrawIcon(x, y, m_hIcon);
    }
    else
    {
        CDialogEx::OnPaint();
    }
}

HCURSOR CMyDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}

void CMyDlg::OnBnClickedAdd()
{
    UpdateData();

    Student student(CStringA(m_name).GetString(), m_score);
    m_studentMgr.addStudent(student);

    updateListCtrl();
}

void CMyDlg::OnBnClickedDelete()
{
    CListCtrl* pListCtrl = (CListCtrl*)GetDlgItem(IDC_LIST);
    int index = pListCtrl->GetSelectionMark();

    if (index != -1)
    {
        m_studentMgr.removeStudent(index);
        updateListCtrl();
    }
}

void CMyDlg::OnBnClickedUpdate()
{
    CListCtrl* pListCtrl = (CListCtrl*)GetDlgItem(IDC_LIST);
    int index = pListCtrl->GetSelectionMark();

    if (index != -1)
    {
        UpdateData();

        Student student(CStringA(m_name).GetString(), m_score);
        m_studentMgr.updateStudent(index, student);

        updateListCtrl();
    }
}

void CMyDlg::updateListCtrl()
{
    CListCtrl* pListCtrl = (CListCtrl*)GetDlgItem(IDC_LIST);
    pListCtrl->DeleteAllItems();

    for (int i = 0; i < m_studentMgr.getNumStudents(); i++)
    {
        Student student = m_studentMgr.getStudent(i);

        LVITEM lvitem;
        lvitem.mask = LVIF_TEXT;
        lvitem.iItem = i;
        lvitem.iSubItem = 0;
        lvitem.pszText = (LPWSTR)student.getName().c_str();
        pListCtrl->InsertItem(&lvitem);

        lvitem.mask = LVIF_TEXT;
        lvitem.iItem = i;
        lvitem.iSubItem = 1;
        lvitem.pszText = (LPWSTR)std::to_wstring(student.getScore()).c_str();
        pListCtrl->SetItem(&lvitem);
    }
}

其中，IDC_NAME、IDC_SCORE、IDC_LIST 分别是对应的控件 ID。在资源文件中需要添加这些控件，并且对话框类需要添加响应函数 OnBnClickedAdd、OnBnClickedDelete、OnBnClickedUpdate。