基于C++，Qt的酒店管理系统

#include "widget.h" #include "ui_widget.h" #include <QDebug> #include <QTimer> #include <QDateTime> #include <QMessageBox> #include <string> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { setFixedSize(800,600); ui->setupUi(this); ui->txtPwd->setFocus(); // ui->btnRegister->setVisible(false); QTimer * timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(SetBDate()));//将定时器与SetBDate函数绑定 timer->start(100);//一秒计时一次 QStringList strings; QSqlQuery queryid("SELECT Uid FROM User"); while(queryid.next()) { QString id = queryid.value(0).toString(); strings.append(id); } ui->comboBox->clear(); ui->comboBox->addItems(strings); } Widget::~Widget() { delete ui; } void Widget::on_btn_Login_clicked() { QString truePwd; if(ui->txtPwd->text().isEmpty()) { QMessageBox::critical(this,tr("错误"),tr("密码不能为空！")); } else { QString password=ui->txtPwd->text(); //从数据库中获取账号，密码的值 QSqlQuery query; QString str=QString("select password from User"); query.exec(str); bool ret = false; while(query.next()) { truePwd = query.value(0).toString(); //qDebug()<<truePwd; if(password==truePwd) { ret =true; break; } } if(ret ==true) { m_function = new function; m_function->show(); this->hide(); } else { QMessageBox::critical(this,tr("错误"),tr("密码错误！")); return; } } } void Widget::on_btnRegister_clicked() { m_registers.show(); } void Widget::SetBDate() { ui->lblDate->setText(QDateTime::currentDateTime().toString("营业日期: yyyy-MM-dd hh:mm:ss")); } void Widget::on_pb7_clicked() { ui->txtPwd->insert("7");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb8_clicked() { ui->txtPwd->insert("8");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb9_clicked() { ui->txtPwd->insert("9");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb4_clicked() { ui->txtPwd->insert("4");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb5_clicked() { ui->txtPwd->insert("5");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb6_clicked() { ui->txtPwd->insert("6");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb1_clicked() { ui->txtPwd->insert("1");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb2_clicked() { ui->txtPwd->insert("2");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb3_clicked() { ui->txtPwd->insert("3");//enter_lineEdit为需要输入数字的地 } void Widget::on_pb0_clicked() { ui->txtPwd->insert("0");//enter_lineEdit为需要输入数字的地 } void Widget::on_pbClear_clicked() { ui->txtPwd->clear(); } void Widget::on_pbDelete_clicked() { QString strCurpwd = ui->txtPwd->text(); //密码 //移除最后一个字符 chop 函数 if(ui->txtPwd->hasFocus() && strCurpwd.size() >0) strCurpwd.chop(1); ui->txtPwd->setText(strCurpwd); }