QT表格与数据 - 技术栈

DataStruct.h

复制代码

#ifndef DATASTRUCT_H
#define DATASTRUCT_H
#include <QString>
#include <QDate>

struct Note{
    QString to;
    QString from;
    QString heading;
    QString body;
    QDate date;
    QString location;
    QString priority;
};
#endif // DATASTRUCT_H

configmanager.h

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#ifndef CONFIGMANAGER_H
#define CONFIGMANAGER_H

#include <QObject>
#include <QList>
#include <QFile>
#include <QXmlStreamReader>
#include <QDebug>
#include <QDate>
#include "DataStruct.h"

class ConfigManager
{
public:
    static ConfigManager* getInstance();
    QList<Note> getConfigFileData();
    // 保存数据到 XML 文件
    bool saveNotesToXmlFile(const QList<Note> &notes);
    void init();
private:
    explicit ConfigManager();
     ~ConfigManager();
    ConfigManager(const ConfigManager& other);
    void loadConfig();

    QString dataPath;
    static ConfigManager* instance;
    //配置文件内容
    QList<Note> m_data;

signals:

};

#endif // CONFIGMANAGER_H

configmanager.cpp

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#include "configmanager.h"
#include <QCoreApplication>
#include <QDir>  // 关键：包含 QDir 头文件

ConfigManager* ConfigManager::instance=nullptr;
ConfigManager *ConfigManager::getInstance()
{
    if(!instance)
    {
        instance=new ConfigManager();
    }
    return instance;
}

QList<Note> ConfigManager::getConfigFileData()
{
    return m_data;
}

bool ConfigManager::saveNotesToXmlFile(const QList<Note> &notes)
{
    //fileName=dataPath;
    QFile file(dataPath);
    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
        qDebug() << "Failed to open file for saving:" << dataPath;
        return false;
    }

    QXmlStreamWriter writer(&file);
    writer.setAutoFormatting(true);
    writer.writeStartDocument();
    writer.writeStartElement("notes");

    for (const Note &note : notes) {
        writer.writeStartElement("note");

        writer.writeTextElement("to", note.to);
        writer.writeTextElement("from", note.from);
        writer.writeTextElement("heading", note.heading);
        writer.writeTextElement("body", note.body);
        writer.writeTextElement("date", note.date.toString("yyyy-MM-dd"));
        writer.writeTextElement("location", note.location);
        writer.writeTextElement("priority", note.priority);

        writer.writeEndElement(); // note
    }

    writer.writeEndElement(); // notes
    writer.writeEndDocument();

    file.close();
    return true;
}

void ConfigManager::init()
{
    dataPath=QCoreApplication::applicationDirPath()+"/../../config/"+"test.xml";
    loadConfig();
}

ConfigManager::ConfigManager()
{

}

ConfigManager::~ConfigManager()
{
    if (instance) {
        delete instance;
        instance = nullptr;
    }
}

void ConfigManager::loadConfig()
{
    QFile file(dataPath);

    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
        qDebug() << "Failed to open file:" << dataPath;
        return;
    }

    QXmlStreamReader xmlReader(&file);
    while (!xmlReader.atEnd() && !xmlReader.hasError()) {
        xmlReader.readNext();
        if (xmlReader.isStartElement()) {
            if (xmlReader.name() == "note") {
                Note note;
                while (!(xmlReader.isEndElement() && xmlReader.name() == "note")) {
                    xmlReader.readNext();
                    if (xmlReader.isStartElement()) {
                        if (xmlReader.name() == "to") {
                            note.to = xmlReader.readElementText();
                        } else if (xmlReader.name() == "from") {
                            note.from = xmlReader.readElementText();
                        } else if (xmlReader.name() == "heading") {
                            note.heading = xmlReader.readElementText();
                        } else if (xmlReader.name() == "body") {
                            note.body = xmlReader.readElementText();
                        } else if (xmlReader.name() == "date") {
                            note.date = QDate::fromString(xmlReader.readElementText(), "yyyy-MM-dd");
                        } else if (xmlReader.name() == "location") {
                            note.location = xmlReader.readElementText();
                        } else if (xmlReader.name() == "priority") {
                            note.priority = xmlReader.readElementText();
                        }
                    }
                }
                m_data.append(note);
            }
        }
    }

    if (xmlReader.hasError()) {
        qDebug() << "XML Error:" << xmlReader.errorString();
    }

    file.close();
}

mainwindow.h

cpp 复制代码

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QLabel>
#include <QComboBox>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QTableWidget>
#include "configmanager.h"

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private slots:
    void onCellEdited(int row, int column); // 处理编辑完成后的槽函数

private:
    Ui::MainWindow *ui;
    QVBoxLayout *layout;
    QTableWidget *tableWidget;
    QList<Note> notes;                     // 保存的 note 数据
    QString xmlFilePath;                   // 配置文件路径
    void saveNotesToXml();                 // 保存表格中的数据到 XML 文件

};
#endif // MAINWINDOW_H

mainwindow.

cpp 复制代码

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    // 创建中心部件
    QWidget *centralWidget = new QWidget(this);
    setCentralWidget(centralWidget); // 将中心部件设置为窗口的中央部件

    layout=new QVBoxLayout(centralWidget);
     QLabel *nameLabel = new QLabel("选择姓名:",this);  // 创建 QLabel
     QComboBox *comboBox = new QComboBox(this);   // 创建 QComboBox
     QHBoxLayout *nameHBox=new QHBoxLayout();
     nameHBox->addWidget(nameLabel);
     nameHBox->addWidget(comboBox);
     nameHBox->addStretch();
     layout->addLayout(nameHBox);
     // 创建 QTableWidget 来展示数据
    tableWidget = new QTableWidget(this);
     tableWidget->setColumnCount(7);
     QStringList headers = {"To", "From", "Heading", "Body", "Date", "Location", "Priority"};
     tableWidget->setHorizontalHeaderLabels(headers);
     layout->addWidget(tableWidget);
     notes=ConfigManager::getInstance()->getConfigFileData();
     // 确保表格的行数与 notes 列表一致
     tableWidget->setRowCount(notes.size());
     for (int row = 0; row < notes.size(); ++row) {
         const Note& note = notes[row];
         tableWidget->setItem(row, 0, new QTableWidgetItem(note.to));
         tableWidget->setItem(row, 1, new QTableWidgetItem(note.from));
         tableWidget->setItem(row, 2, new QTableWidgetItem(note.heading));
         tableWidget->setItem(row, 3, new QTableWidgetItem(note.body));
         tableWidget->setItem(row, 4, new QTableWidgetItem(note.date.toString("yyyy-MM-dd")));
         tableWidget->setItem(row, 5, new QTableWidgetItem(note.location));
         tableWidget->setItem(row, 6, new QTableWidgetItem(note.priority));
     }
     // 允许表格编辑
     tableWidget->setEditTriggers(QAbstractItemView::DoubleClicked | QAbstractItemView::SelectedClicked);

     // 连接编辑完成信号
     connect(tableWidget, &QTableWidget::cellChanged, this, &MainWindow::onCellEdited);
     //layout->addStretch();
}

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

void MainWindow::onCellEdited(int row, int column)
{
    // 获取编辑后的值
    QString newValue = tableWidget->item(row, column)->text();

    // 更新对应的 Note 对象
    switch (column) {
    case 0: notes[row].to = newValue; break;
    case 1: notes[row].from = newValue; break;
    case 2: notes[row].heading = newValue; break;
    case 3: notes[row].body = newValue; break;
    case 4: notes[row].date = QDate::fromString(newValue, "yyyy-MM-dd"); break;
    case 5: notes[row].location = newValue; break;
    case 6: notes[row].priority = newValue; break;
    }

    // // 保存所有数据到 XML 文件
     saveNotesToXml();
}

void MainWindow::saveNotesToXml()
{
    ConfigManager::getInstance()->saveNotesToXmlFile(notes);
}

main.cpp

cpp 复制代码

#include "mainwindow.h"

#include <QApplication>
#include "configmanager.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    //加载配置文件
    ConfigManager::getInstance()->init();
    MainWindow w;
    w.show();
    return a.exec();
}

xml：

<?xml version="1.0" encoding="UTF-8"?>

<notes>

<note>

<body>记得明天开会！</body>

</note>

<note>

<body>请准备材料。</body>

</note>

</notes>

运行截图：