qt 汽车管理系统

界面设计

运行后界面

数据库表：

connection.h文件

#ifndef CONNECTION_H
#define CONNECTION_H

#include<Qtsql>
#include<QDebug>
#include<qdom.h>
#include<QDebug>
#include <QSqlQuery>
static bool createConnection()
{
    // "Old_DB");
    QSqlDatabase d=QSqlDatabase::addDatabase("QMYSQL");
    d.setHostName("localhost");

    d.setUserName("root");
    d.setPassword("123456");
    d.setDatabaseName("vehicle_management_system");
    /*if(!db.open())
    {
        return false;
    }
    */
    if(d.open())
        qDebug()<<"Hi mysql!连接"<<endl;
    else
        qDebug()<<"失败"<<d.lastError()<<endl;
    qDebug()<<QSqlDatabase::drivers()<<endl;
    // QSqlQuery query;
    QSqlQuery *query = new QSqlQuery(d);
    //添加完数据之后需要编译一下
    query->exec(QString("insert into factory values('0','请选择厂家')"));
    query->exec(QString("insert into factory values('01','一汽大众')"));
    query->exec(QString("insert into factory values('02','上海神龙')"));
    query->exec(QString("insert into factory values('03','上海大众')"));
    query->exec(QString("INSERT INTO factory VALUES('05','奔驰');"));

    query->exec(QString("insert into cbrand values('01','奥迪A6','一汽大众',36,50,10,40)"));
    query->exec(QString("insert into cbrand values('02','捷达','一汽大众',34,20,5,15)"));
    query->exec(QString("insert into cbrand values('03','宝来','一汽大众',41,80,20,60)"));
    query->exec(QString("insert into cbrand values('04','奔驰','一汽大众',83,40,15,25)"));
    query->exec(QString("insert into cbrand values('05','毕加索','二汽神龙',39,50,15,35)"));
    query->exec(QString("insert into cbrand values('06','富康','二汽神龙',28,60,10,50)"));
    query->exec(QString("insert into cbrand values('07','标志307','二汽神龙',27,70,20,50)"));
    query->exec(QString("insert into cbrand values('08','桑塔纳','上海大众',25,75,25,50)"));
    query->exec(QString("insert into cbrand values('09','帕萨特','上海大众',27,65,20,45)"));
    //query->exec(QString("insert into cbrand values('01','奥迪A6','一汽大众',36,50,10,40)"));

    //query.exec(QString("insert into cbrand"));

     return true;

}

#endif // CONNECTION_H

widget.h文件

#ifndef WIDGET_H

#define WIDGET_H

//添加头文件

#include <QWidget>

#include<QMainWindow>

#include<QMenu>

namespace Ui {

class Widget;

}

class Widget : public QMainWindow

{

    Q_OBJECT

public:

    explicit Widget(QWidget *parent = 0);

    ~Widget();

    //销售管理主菜单

    QMenu *manageMenu;

    //修改密码的主菜单

    QMenu *passwordMenu;

 //动作 QAction类中保存了文本名称、快捷方式、图标、显示状态等

   QAction *manageAction;

   QAction *chartAction;

   QAction *quitAction;

private slots:

   void on_manageMenu_clicked();

   void on_chartMenu_clicked();

   void on_quitMenu_clicked();

   void on_sellFactoryComBox_currentIndexChanged(const QString &arg1);

   void on_sellCancelBtn_clicked();

   void on_sellBrandComBox_currentIndexChanged(const QString &arg1);

   void on_sellNumSpinBox_valueChanged(int arg1);

private:

    Ui::Widget *ui;

    void CreateMenuBar();

};

#endif // WIDGET_H

main.cpp文件

#include "widget.h"

#include <QApplication>

#include<connection.h>

#include<QDebug>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    createConnection();

      qDebug()<<"22222222222";

    Widget w;

    w.show();

    return a.exec();

}

widget.cpp文件

#include "widget.h"

#include "ui_widget.h"

#include<QMenuBar>

#include<connection.h>

#include<QSqlQueryModel>

#include<QSplitter>

#include<QSqlQuery>

#include<QMessageBox>

Widget::Widget(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    setFixedSize(600,450);

    CreateMenuBar();

    ui->stackedWidget->setCurrentIndex(0);

    QSqlQueryModel *factoryModel=new QSqlQueryModel(this);

    factoryModel->setQuery("select cname from factory");

    ui->sellFactoryComBox->setModel(factoryModel);

    QSplitter *splitter=new QSplitter(ui->managePage);

    splitter->resize(700,360);

    splitter->move(0,50);

    splitter->addWidget(ui->toolBox);

    splitter->addWidget(ui->DailyList);

    splitter->setStretchFactor(0,1);

    splitter->setStretchFactor(1,1);

}

Widget::~Widget()

{

    delete ui;

}

void Widget::on_manageMenu_clicked()

{

    ui->stackedWidget->setCurrentIndex(0);

}

void Widget::on_chartMenu_clicked()

{

    ui->stackedWidget->setCurrentIndex(1);

}

void Widget::on_quitMenu_clicked()

{

    this->close();

}

void Widget::CreateMenuBar()

{

  manageAction=new QAction(tr("品牌车管理"),this);

  chartAction =new QAction(tr("销售统计"),this);

  quitAction =new QAction(tr("退出"),this);

  manageAction->setShortcut(tr("Ctrl+M"));

  chartAction->setShortcut(tr("Ctrl+C"));

  quitAction->setShortcut(tr("Ctrl+Q"));

  manageMenu=menuBar()->addMenu(tr("销售管理"));

  manageMenu->addAction(manageAction);

  manageMenu->addAction(chartAction);

  manageMenu->addSeparator();

  manageMenu->addAction(quitAction);

  passwordMenu=menuBar()->addMenu(tr("修改密码"));

  connect(manageAction,SIGNAL(triggered()),this,SLOT(on_manageMenu_clicked()));

  connect(chartAction,SIGNAL(triggered()),this,SLOT(on_chartMenu_clicked()));

  connect(quitAction,SIGNAL(triggered()),this,SLOT(on_quitMenu_clicked()));

}

void Widget::on_sellFactoryComBox_currentIndexChanged(const QString &arg1)

{

  if(arg1=="请选择厂家")

       {

          on_sellCancelBtn_clicked();

       }

  else

  {

      ui->sellBrandComBox->setEnabled(true);

      QSqlQueryModel *model=new  QSqlQueryModel(this);

      //sql语句错误导致无法查询

      model->setQuery(QString("select cname from cbrand where dreeFactory='%1'").arg(arg1));

      ui->sellBrandComBox->setModel(model);

      ui->sellCancelBtn->setEnabled(true);

  }

}

void Widget::on_sellCancelBtn_clicked()

{

}

void Widget::on_sellBrandComBox_currentIndexChanged(const QString &arg1)

{

ui->sellNumSpinBox->setValue(0);

ui->sellNumSpinBox->setEnabled(false);

ui->sellSumLastEdit->clear();

ui->sellSumLastEdit->setEnabled(false);

ui->sellOkBtn->setEnabled(false);

QSqlQuery *query = new QSqlQuery();

query->exec(QString("select Cprice from cbrand where cname='%1' and dreeFactory='%2'").arg(arg1).arg(ui->sellFactoryComBox->currentText()));

query->next();

ui->sellPriceLineEdit->setEnabled(true);

ui->sellPriceLineEdit->setReadOnly(true);

ui->sellPriceLineEdit->setText(query->value(0).toString());

query->exec(QString("select sumLast from cbrand where cname='%1' and dreeFactory='%2'").arg(arg1).arg(ui->sellFactoryComBox->currentText()));

query->next();

int num=query->value(0).toInt();

if(num==0)

{

    QMessageBox::information(this,tr("提示"),tr("该品牌汽车已经售完!"),QMessageBox::Ok);

}else

{

    ui->sellNumSpinBox->setEnabled(true);

    ui->sellNumSpinBox->setMaximum(num);

    ui->sellLastNumLabel->setText(tr("剩余数量：%1").arg(num));

    ui->sellLastNumLabel->setVisible(true);

}

}

void Widget::on_sellNumSpinBox_valueChanged(int arg1)

{

   if(arg1==0)

   {

       ui->sellSumLastEdit->clear();

       ui->sellSumLastEdit->setEnabled(false);

       ui->sellOkBtn->setEnabled(false);

   }else

   {

       ui->sellSumLastEdit->setEnabled(true);

       ui->sellSumLastEdit->setReadOnly(true);

       qreal sum=arg1*(ui->sellPriceLineEdit->text().toInt());

       ui->sellSumLastEdit->setText(QString::number(sum));

       ui->sellOkBtn->setEnabled(true);

   }

}