StudentManager/mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMessageBox>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    model = new QStandardItemModel(this);
    model->setHorizontalHeaderLabels({"学号", "姓名", "成绩"});
    ui->tableView->setModel(model);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_addButton_clicked()
{
    // 添加学生信息的逻辑
    Student stu;
    stu.id = ui -> idEdit->text();
    stu.name = ui -> nameEdit->text();
    stu.score = ui -> scoreEdit->text().toDouble();
    // 判空
    if (stu.id.isEmpty() || stu.name.isEmpty())
    {
        QMessageBox::warning(this, "错误", "学号和姓名不能为空！");
        return;
    }
    students.push_back(stu);
    // 刷新表格
    refreshTable();
    // 刷新输入框内容
    ui->idEdit->clear();
    ui->nameEdit->clear();
    ui->scoreEdit->clear();
}

void MainWindow::on_deleteButton_clicked()
{
    int row = ui->tableView->currentIndex().row();
    if (row < 0)
        return;

    students.remove(row);
    // 刷新表格
    refreshTable();
}

void MainWindow::refreshTable()
{
    model->removeRows(0, model->rowCount());

    for (const Student &stu : students)
    {
        QList<QStandardItem *> row;
        row << new QStandardItem(stu.id)
            << new QStandardItem(stu.name)
            << new QStandardItem(QString::number(stu.score));
        model->appendRow(row);
    }
}