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
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#ifndef LOGIN_H#define LOGIN_H#include <QWidget>namespace Ui {class Login;}class Login : public QWidget{ Q_OBJECTpublic: 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
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#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
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#ifndef REGISTER_H#define REGISTER_H#include <QWidget>namespace Ui {class Register;}class Register : public QWidget{ Q_OBJECTpublic: explicit Register(QWidget *parent = 0); ~Register();private slots: void on_btn_logon_clicked();private: Ui::Register *ui;};#endif // REGISTER_H |
4、register.cpp
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#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
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#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服务器之家。
原文链接：https://blog.csdn.net/junheng0812/article/details/106364553
