QT實現用戶登錄註冊功能
本文實例為大傢分享瞭QT實現用戶登錄註冊的具體代碼,供大傢參考,具體內容如下
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","輸入不能為空",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()) { //結果集為空 //執行某操作 QMessageBox::information(this,"警告","用戶名或密碼錯誤!",QMessageBox::Ok); } else { QMessageBox::information(this,"提醒","登錄成功!",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);//一個值為0 bg->addButton(ui->rbtn_female,1);//一個值為1 int sel=bg->checkedId();//取到你所選的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","用戶名已存在!",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","註冊成功!",QMessageBox::Ok); } }
5、數據庫連接代碼
#ifndef CONNECTION #define CONNECTION #include <QSqlDatabase> #include <QStringList> #include <QString> #include <QDebug> #include <QSqlQuery> #include <QMessageBox> static bool createConnection() { //測試用例:連接mysql數據庫,做一個基本的sql語句操作 //1、對qt下數據庫的驅動進行遍歷查看 QStringList drivers = QSqlDatabase::drivers(); foreach (QString driver, drivers) { qDebug()<<drivers; } //2、打開數據庫過程 QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); //數據庫連接的信息進行配置 db.setHostName("localhost");//設置主機名(數據庫所在電腦的名稱) db.setDatabaseName("medical_system");//設置數據庫名稱 db.setUserName("root"); db.setPassword("123456"); //db.setPort(3306);//因為是本機,該段代碼可省略 if(!db.open()){ //打開失敗的情況 qDebug()<<"Failed to connect"; //實際情況下我們應該使用圖形化窗口提示打開失敗 QMessageBox::critical(0,"無法打開數據庫","無法創建",QMessageBox::Yes); return false; } return true; } #endif // CONNECTION
運行結果
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。