如何用qt实现学生信息管理系统
源码资源https://download.csdn.net/download/it_create/10625713
以下是效果图
mainwindow.cpp
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
#include
#include
#include
#include
#include "deletedialog.h"
#include "insertdialog.h"
#include "selectdialog.h"
#include "updatedialog.h"
namespace Ui {
class MainWindow;
}
struct stdinformation
{
QString name;
QString number;
QString results;
};
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_change_pushButton_clicked();
void on_add_pushButton_clicked();
void on_delete_pushButton_clicked();
void on_refer_pushButton_clicked();
void tabletimeslot();
private:
Ui::MainWindow *ui;
QSqlDatabase db;
QTimer *tabletime;
deleteDialog student_delete;
insertDialog student_insert;
updateDialog student_update;
selectDialog student_select;
int t;
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
//创建数据库，并检查数据库中的数据并在表中生成相应的行数
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("my.db");
if(db.open())
{
qDebug()<<"打开成功";
}
QSqlQuery query;
if(query.exec("create table student(StudentName VARCHAR(30),StudentNumber VARCHAR(30),"
"StudentCollege VARCHAR(30),StudentAge VARCHAR(30),StudentSex VARCHAR(30))"))
{
qDebug()<<"创建成功";
}
query.exec("select * from student");
t=0;
while(query.next())
{
ui->information_tableWidget->insertRow(t);
t++;
}
//刷新表的定时器
tabletime = new QTimer(this);
tabletime->start(2000);
connect(tabletime,SIGNAL(timeout()),this,SLOT(tabletimeslot()));
}
MainWindow::~MainWindow()
{
delete ui;
qDebug()<<"hello";
}
void MainWindow::on_change_pushButton_clicked()
{
student_update.show(); //修改学生信息界面
}
void MainWindow::on_add_pushButton_clicked()
{
int index_row = ui->information_tableWidget->rowCount();
ui->information_tableWidget->setRowCount(index_row+1);
student_insert.show(); //添加学生信息界面
}
void MainWindow::on_delete_pushButton_clicked()
{
student_delete.show(); //删除学生信息界面
}
void MainWindow::on_refer_pushButton_clicked()
{
student_select.show(); //查找学生信息界面
}
void MainWindow::tabletimeslot() //主界面刷新表
{
ui->information_tableWidget->clearContents();
//QString studentname,studentnumber,studentcollege,studentage,studentsex;
QSqlQuery query;
query.exec("select * from student");
int t=0;
while(query.next())
{
ui->information_tableWidget->setItem(t,0,new QTableWidgetItem(query.value(0).toString()));
ui->information_tableWidget->setItem(t,1,new QTableWidgetItem(query.value(1).toString()));
ui->information_tableWidget->setItem(t,2,new QTableWidgetItem(query.value(2).toString()));
ui->information_tableWidget->setItem(t,3,new QTableWidgetItem(query.value(3).toString()));
ui->information_tableWidget->setItem(t,4,new QTableWidgetItem(query.value(4).toString()));
ui->information_tableWidget->setItem(t,5,new QTableWidgetItem(query.value(5).toString()));
/*qDebug()<insertdialog.h
#ifndef INSERTDIALOG_H
#define INSERTDIALOG_H
#include
namespace Ui {
class insertDialog;
}
class insertDialog : public QDialog
{
Q_OBJECT
public:
explicit insertDialog(QWidget *parent = 0);
~insertDialog();
private slots:
void on_insert_pushButton_clicked();
private:
Ui::insertDialog *ui;
};
#endif // INSERTDIALOG_H
insertdialog.cpp
#include "insertdialog.h"
#include "ui_insertdialog.h"
#include "mainwindow.h"
#include
insertDialog::insertDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::insertDialog)
{
ui->setupUi(this);
}
insertDialog::~insertDialog()
{
delete ui;
}
void insertDialog::on_insert_pushButton_clicked()
{
if(ui->studentname_lineEdit->text().isEmpty() || ui->studentnumber_ineEdit->text().isEmpty() ||
ui->studentcollege_lineEdit->text().isEmpty() || ui->studentage_lineEdit->text().isEmpty() ||
ui->studentsex_lineEdit->text().isEmpty())
{
QMessageBox::information(this,"提示","请输入完整");
}
else
{
QString student_name = ui->studentname_lineEdit->text();
QString student_number = ui->studentnumber_ineEdit->text();
QString student_college = ui->studentcollege_lineEdit->text();
QString student_age =ui->studentage_lineEdit->text();
QString student_sex =ui->studentsex_lineEdit->text();
QSqlQuery query;
int index_delete = 0;
query.exec("select * from student");
while(query.next())
{
if(student_number == query.value(1))
{
index_delete = 1;
break;
}
}
if(index_delete == 1)
{
QMessageBox::information(this,"提示","学号已存在");
}
else
{
QString insert_student = QString("insert into student values(\"%1\",\"%2\",\"%3\",\"%4\",\"%5\")").arg(
student_name,student_number,student_college,student_age,student_sex);
qDebug()< deletedialog.h
#ifndef DELETEDIALOG_H
#define DELETEDIALOG_H
#include
namespace Ui {
class deleteDialog;
}
class deleteDialog : public QDialog
{
Q_OBJECT
public:
explicit deleteDialog(QWidget *parent = 0);
~deleteDialog();
private slots:
void on_delete_pushButton_clicked();
private:
Ui::deleteDialog *ui;
};
#endif // DELETEDIALOG_H
deletedialog.cpp
#include "deletedialog.h"
#include "ui_deletedialog.h"
#include "mainwindow.h"
#include
deleteDialog::deleteDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::deleteDialog)
{
ui->setupUi(this);
}
deleteDialog::~deleteDialog()
{
delete ui;
}
void deleteDialog::on_delete_pushButton_clicked()
{
if(ui->scanf_lineEdit->text().isEmpty())
{
QMessageBox::information(this,"提示","请输入内容");
}
else
{
if(ui->studentname_radioButton->isChecked())
{
QString student_name;
student_name = ui->scanf_lineEdit->text();
QSqlQuery query;
query.exec("select * from student");
int t =0;
while(query.next())
{
if(student_name == query.value(0).toString())
{
t= 1;
break;
}
}
if(t == 1)
{
QString delete_name = QString("delete from student where StudentName = \"%1\"").arg(student_name);
qDebug()<studentnumber_radioButton->isChecked())
{
QString student_number;
student_number = ui->scanf_lineEdit->text();
QSqlQuery query;
query.exec("select * from student");
int t =0;
while(query.next())
{
if(student_number == query.value(1).toString())
{
t= 1;
break;
}
}
if( t== 1)
{
QString delete_student = QString("delete from student where StudentNumber = \"%1\"").arg(student_number);
if(query.exec(delete_student))
{
QMessageBox::information(this,"成功","删除成功");
}
else
QMessageBox::information(this,"失败","删除失败");
}
else
{
QMessageBox::information(this,"提示","不存在的学号");
}
}
else
{
QMessageBox::information(this,"提示","请选择姓名或学号");
}
}
}