QT实现用户登录注册功能
本文实例为大家分享了QT实现用户登录注册的具体代码,供大家参考,具体内容如下
1、login.h
#ifndef LOGIN_H #define LOGIN_H #include <QWidget> namespace Ui { class Login; } class Login : public QWidget { Q_OBJECT public: explicit Login(QWidget *parent = 0); ~Login(); private slots: void on_btn_login_clicked(); void on_btn_register_clicked(); private: Ui::Login *ui; }; #endif // WIDGET_H
2、login.cpp
#include "login.h" #include "ui_login.h" #include "register.h" #include "mainwindow.h" #include <QMessageBox> #include <QSqlQuery> #include <QFile> #include <QDebug> Login::Login(QWidget *parent) : QWidget(parent), ui(new Ui::Login) { ui->setupUi(this); ui->ledit_password->setEchoMode(QLineEdit::Password); } Login::~Login() { delete ui; } void Login::on_btn_login_clicked() { QString username = ui->ledit_username->text(); QString password = ui->ledit_password->text(); if(username == "" ||password == ""){ QMessageBox::information(this,"警告","输入不能为空",QMessageBox::Ok); }else{ QSqlQuery query; query.prepare("select username,password from admin where username=:username and password = :password "); query.bindValue(":username", username); query.bindValue(":password", password); query.exec(); if(!query.next()) { //结果集为空 //执行某操作 QMessageBox::information(this,"警告","用户名或密码错误!",QMessageBox::Ok); } else { QMessageBox::information(this,"提醒","登录成功!",QMessageBox::Ok); MainWindow *m = new MainWindow; m->show(); this->close(); } } } void Login::on_btn_register_clicked() { Register *r = new Register; r->show(); }
3、register.h
#ifndef REGISTER_H #define REGISTER_H #include <QWidget> namespace Ui { class Register; } class Register : public QWidget { Q_OBJECT public: explicit Register(QWidget *parent = 0); ~Register(); private slots: void on_btn_logon_clicked(); private: Ui::Register *ui; }; #endif // REGISTER_H
4、register.cpp
#include "register.h" #include "ui_register.h" #include <QButtonGroup> #include <QMessageBox> #include <QRegExp> #include <QSqlQuery> Register::Register(QWidget *parent) : QWidget(parent), ui(new Ui::Register) { ui->setupUi(this); } Register::~Register() { delete ui; } void Register::on_btn_logon_clicked() { QString username = ui->ledit_username->text(); QString password = ui->ledit_pwd->text(); QString name = ui->ledit_name->text(); int age = ui->ledit_age->text().toInt(); QButtonGroup *bg=new QButtonGroup(this); bg->addButton(ui->rbtn_male,0);//一个值为0 bg->addButton(ui->rbtn_female,1);//一个值为1 int sel=bg->checkedId();//取到你所选的radioButton的值 QString gender; switch(sel) { case 0: gender="男"; break; case 1: gender="女"; break; default: gender=""; break; } QSqlQuery query; query.prepare("select username from patient where username=:username"); query.bindValue(":username", username); query.exec(); if(query.next()) { QMessageBox::information(this,"警告","用户名已存在!",QMessageBox::Ok); } else { query.prepare("insert into patient(username,password,patientName,age,gender)" "values(:username,:password,:patientName,:age,:gender)"); query.bindValue(":username", username); query.bindValue(":password",password); query.bindValue(":patientName", name); query.bindValue(":age", age); query.bindValue(":gender", gender); query.exec(); QMessageBox::information(this,"警告","注册成功!",QMessageBox::Ok); } }
5、数据库连接代码
#ifndef CONNECTION #define CONNECTION #include <QSqlDatabase> #include <QStringList> #include <QString> #include <QDebug> #include <QSqlQuery> #include <QMessageBox> static bool createConnection() { //测试用例:连接mysql数据库,做一个基本的sql语句操作 //1、对qt下数据库的驱动进行遍历查看 QStringList drivers = QSqlDatabase::drivers(); foreach (QString driver, drivers) { qDebug()<<drivers; } //2、打开数据库过程 QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); //数据库连接的信息进行配置 db.setHostName("localhost");//设置主机名(数据库所在电脑的名称) db.setDatabaseName("medical_system");//设置数据库名称 db.setUserName("root"); db.setPassword("123456"); //db.setPort(3306);//因为是本机,该段代码可省略 if(!db.open()){ //打开失败的情况 qDebug()<<"Failed to connect"; //实际情况下我们应该使用图形化窗口提示打开失败 QMessageBox::critical(0,"无法打开数据库","无法创建",QMessageBox::Yes); return false; } return true; } #endif // CONNECTION
运行结果
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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