QT-day5

将注册功能连接到数据库

#include "mywnd.h"
#include 
#include 
#include 
#include 
#include 

MyWnd::MyWnd(QWidget *parent)
    : QWidget(parent)
{
    this->setFixedSize(400,350);
    this->setWindowTitle("Widget");
    this->setWindowIcon(QIcon(":/icon/wodepeizhenshi.png"));
    lab1 = new QLabel(this);
    lab1->resize(400,150);
    lab1->setPixmap(QPixmap(":/icon/logo.png"));
    lab1->setScaledContents(true);

    lab2 = new QLabel(this);
    lab2->resize(60,55);
    lab2->move(75,160);
    lab2->setPixmap(QPixmap(":/icon/userName.jpg"));
    lab2->setScaledContents(true);

    lab3 = new QLabel(this);
    lab3->resize(60,55);
    lab3->move(lab2->x(),lab2->y()+65);
    lab3->setPixmap(QPixmap(":/icon/passwd.jpg"));
    lab3->setScaledContents(true);
    //账号
    edit1 = new QLineEdit(this);
    this->edit1->setPlaceholderText("账号名");
    edit1->resize(200,55);
    edit1->move(lab2->x()+65,lab2->y());
    //密码
    edit2 = new QLineEdit(this);
    this->edit2->setPlaceholderText("******");
    edit2->resize(200,55);
    edit2->move(lab3->x()+65,lab3->y());
    edit2->setEchoMode(QLineEdit::Password);
    //登录
    bton1 = new QPushButton(QIcon(":/icon/login.png"),"登录",this);
    bton1->resize(90,55);
    bton1->move(edit2->x()+20,edit2->y()+65);
    //取消
    bton2 = new QPushButton(QIcon(":/icon/cancel.png"),"取消",this);
    bton2->resize(90,55);
    bton2->move(bton1->x()+105,bton1->y());
    //注册
    registerBtn = new QPushButton("注册",this);
    registerBtn->resize(90,55);
    registerBtn->move(bton1->x()-105,bton1->y());
    //按钮连接对应的槽函数
    connect(bton1,&QPushButton::clicked,this,&MyWnd::loginbton1_clicked);
    connect(bton2,&QPushButton::clicked,this,&MyWnd::cancelbton2_clicked);
    connect(registerBtn,&QPushButton::clicked,this,&MyWnd::register_slot);
    connect(registerBtn,&QPushButton::clicked,this,&MyWnd::registerBtn_clicked);

    if(!db.contains("mydatabase.db")){

        db = QSqlDatabase::addDatabase("QSQLITE");

        db.setDatabaseName("F:\\C++\\hqyj\\mydatabase.db");

    }
    //打开数据库
    if(!db.open()){
        QMessageBox::information(this,"失败","数据库打开失败");
        return ;
    }
    //需要使用Sql语句创建表
    QString sql = "create table if not exists stu_info("
                  "account varchar(10) ,"
                  "passwd integer)";
    //准备语句执行者
    QSqlQuery query;

    if(!query.exec(sql)){
        QMessageBox::information(this,"失败","创建表失败");
        return ;
    }

}

void  MyWnd::loginbton1_clicked()
{
    if(edit1->text()=="admin"&&edit2->text()=="123456"){
        QMessageBox sucbox(QMessageBox::Information,
                           "登录",
                           "登录成功",
                           QMessageBox::Ok,
                           this);
        int ret = sucbox.exec();
        if(ret == QMessageBox::Ok){
            this->close();
           // emit jumpsignal();
        }
    }else{
        QMessageBox errbox(QMessageBox::Critical,
                           "登录",
                           "账号密码不匹配，是否重新登录",
                           QMessageBox::Ok|QMessageBox::Cancel,
                           this);
        int ret = errbox.exec();
        if(ret == QMessageBox::Ok){
            edit2->clear();
        }else if(ret == QMessageBox::Cancel){
            this->close();
        }
    }
}

void MyWnd::cancelbton2_clicked()
{
    int ret = QMessageBox::question(this,
                                    "取消",
                                    "是否确定要退出登录",
                                    QMessageBox::Yes|QMessageBox::No,
                                    QMessageBox::Yes);
    if(ret == QMessageBox::Yes){
        this->close();
    }
}
void MyWnd::registerBtn_clicked()
{
    emit jumpsignal();
}
//注册连接数据库
void MyWnd::register_slot(){
    //获取注册要录入的数据
    QString account = this->edit1->text();

    int passwd = this->edit2->text().toUInt();

    //确保每个编辑器都有数据
    if(account.isEmpty() || passwd == 0){
        QMessageBox::information(this,"提示","请将信息填写完整");
        return ;
    }
    //准备sql语句
    QString sql = QString("insert into stu_info(account,passwd)"
                          "values('%1', %2)").arg(account).arg(passwd);
    QSqlQuery query;
    if(!query.exec(sql)){
        QMessageBox::information(this,"失败","注册失败");
        return ;
    }else{
        QMessageBox::information(this,"成功","注册成功");
    }

}

MyWnd::~MyWnd()
{
}