qt项目：员工信息管理系统

开发一个员工信息管理系统

一、项目具体要求：

1、用qt开发界面，数据库用QSqlite 数据库文件名：demostudent.db

2、通过界面能够查看到数据库中员工信息表中内容，包括员工姓名、年龄、性别、

成绩、生日、基本工资和照片。

3、能够查看指定记录，修改和编辑员工信息

4、员工信息中包含照片，界面上可以显示学员照片并且可以修改学员照片

5、通过界面可增加员工记录，可以删除指定的学员记录

二、项目界面展示

1、主界面：通过openDB按钮打开指定的数据库文件，将数据库表中的学员信息显示在主界面中tableView中。

其它的按钮依次是 插入按钮、编辑当前记录和删除指定记录

点击upSalary按钮，所有学员的基本工资增加1000

2、编辑学员信息的界面

单击编辑按钮或者双击某一个记录，则弹出如下编辑窗口

编辑窗口通过相关控件显示指定的记录各个字段的数据，包括照片信息

修改相关数据之后，点击ok按钮之后，则新数据更新到数据库中

通过setPhoto和clearPhoto两个按钮可以设置和修改照片

3、增加学员信息的界面

通过界面相关控件录入员工的信息，包括设置照片。

点击ok按钮，将学员信息插入到数据库表中。

三、项目代码实现：

1、项目中主要为两个类文件，描述界面的类文件mainWidget

和描述插入和编辑界面的类文件wDialogData

2、mainWidget类文件代码如下：

mainWidget.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QSqlDatabase>

#include <QSqlQueryModel>

#include <QItemSelectionModel>

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

Q_OBJECT

public:

explicit MainWindow(QWidget *parent = 0);

~MainWindow();

private slots:

void on_actOpenDB_triggered();

void on_actInsert_triggered();

void on_actEdit_triggered();

void on_tableView_doubleClicked(const QModelIndex &index);

void on_actDelete_triggered();

void on_actUpsalary_triggered();

private:

Ui::MainWindow *ui;

QSqlDatabase db;

QSqlQueryModel *theModel;

QItemSelectionModel *theSelection;

void openTable();

void updateRecord(int recNo);

};

#endif // MAINWINDOW_H

mainWidget.cpp

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include "wdialogdata.h"

#include <QFileDialog>

#include <QMessageBox>

#include <QDebug>

#include <QSqlError>

#include <QSqlRecord>

#include <QSqlQuery>

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

}

MainWindow::~MainWindow()

{

delete ui;

}

void MainWindow::openTable()

{

theModel = new QSqlQueryModel(this);

theSelection = new QItemSelectionModel(theModel);

theModel->setQuery("select id,name,age,sex,birthday,salary,photo from stu");

if(theModel->lastError().isValid())

{

QMessageBox::information(this,"error","select error\n" + theModel->lastError().text(),QMessageBox::Ok,QMessageBox::NoButton);

return;

}

theModel->setHeaderData(0,Qt::Horizontal,"工号");

theModel->setHeaderData(1,Qt::Horizontal,"姓名");

theModel->setHeaderData(2,Qt::Horizontal,"年龄");

theModel->setHeaderData(3,Qt::Horizontal,"性别");

theModel->setHeaderData(4,Qt::Horizontal,"生日");

theModel->setHeaderData(5,Qt::Horizontal,"工资");

ui->tableView->setModel(theModel);

ui->tableView->setColumnHidden(6,true);

ui->tableView->setSelectionModel(theSelection);

ui->actOpenDB->setEnabled(false);

ui->actInsert->setEnabled(true);

ui->actDelete->setEnabled(true);

ui->actEdit->setEnabled(true);

}

void MainWindow::updateRecord(int recNo)

{

QSqlRecord curRec = theModel->record(recNo);

//int empNo = curRec.value("id").toInt();

QSqlQuery query;

WDialogData *dataDialog  = new WDialogData(this);

dataDialog->setUPdateRecord(curRec);

int ret = dataDialog->exec();

if(ret == QDialog::Accepted)

{

QSqlRecord recData = dataDialog->getRecord();

query.prepare("update stu set name = :name,age = :age ,sex = :sex,birthday = :birthday,salary = :salary,photo = :photo where id = :id");

query.bindValue(":id",recData.value("id"));

query.bindValue(":name",recData.value("name"));

query.bindValue(":age",recData.value("age"));

query.bindValue(":sex",recData.value("sex"));

query.bindValue(":birthday",recData.value("birthday"));

query.bindValue(":salary",recData.value("salary"));

query.bindValue(":photo",recData.value("photo"));

if(!query.exec())

QMessageBox::critical(this,"error","update error\n" + query.lastError().text(),QMessageBox::Ok,QMessageBox::NoButton);

else

theModel->query().exec();

}

delete dataDialog;

}

void MainWindow::on_actOpenDB_triggered()

{

QString aFile = QFileDialog::getOpenFileName(this,"select database file","","sqlite(*.db *.db3)");

if(aFile.isEmpty())

{

return;

}

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

db.setDatabaseName(aFile);

qDebug()<<aFile;

if(!db.open())

{

QMessageBox::warning(this,"error","open database error",QMessageBox::Ok,QMessageBox::NoButton);

return;

}

openTable();

}

void MainWindow::on_actInsert_triggered()

{

QSqlQuery query;

query.exec("select * from stu where id = -1");

QSqlRecord curRec = query.record();

curRec.setValue("id",theModel->rowCount() + 2000);

qDebug()<<curRec.value("id").toInt();

WDialogData *dataDialog = new WDialogData(this);

dataDialog->setInsertRecord(curRec);

int ret = dataDialog->exec();

if(ret == QDialog::Accepted)

{

QSqlRecord recData = dataDialog->getRecord();

query.prepare("insert into stu(id,name,age,sex,birthday,salary,photo) values(:id,:name,:age,:sex,:birthday,:salary,:photo)");

query.bindValue(":id",recData.value("id"));

query.bindValue(":name",recData.value("name"));

query.bindValue(":age",recData.value("age"));

query.bindValue(":sex",recData.value("sex"));

query.bindValue(":salary",recData.value("salary"));

query.bindValue(":photo",recData.value("photo"));

query.bindValue(":birthday",recData.value("birthday"));

if(!query.exec())

{

QMessageBox::critical(this,"error","insert error\n" + query.lastError().text(),QMessageBox::Ok,QMessageBox::NoButton);

}else

theModel->setQuery("select id,name,age,sex,birthday,salary,photo from stu");

}

delete dataDialog;

}

void MainWindow::on_actEdit_triggered()

{

int curRecNo = theSelection->currentIndex().row();

updateRecord(curRecNo);

}

void MainWindow::on_tableView_doubleClicked(const QModelIndex &index)

{

int curRecNo = index.row();

updateRecord(curRecNo);

}

void MainWindow::on_actDelete_triggered()

{

int curRecord = theSelection->currentIndex().row();

QSqlRecord curRec = theModel->record(curRecord);

if(curRec.isEmpty())

return;

int empNo = curRec.value("id").toInt();

QSqlQuery query;

query.prepare("delete from stu where id = :id");

query.bindValue(":id",empNo);

if(!query.exec())

QMessageBox::critical(this,"error","delete error\n" + query.lastError().text(),QMessageBox::Ok,QMessageBox::NoButton);

else

theModel->query().exec();

}

void MainWindow::on_actUpsalary_triggered()

{

QSqlQuery qryEmpList;

qryEmpList.exec("select id,salary from stu order by id");

qryEmpList.first();

QSqlQuery qryUpdate;

qryUpdate.prepare("update stu set salary = :salary where id = :id");

while (qryEmpList.isValid()) {

int empId = qryEmpList.value("id").toInt();

float salary = qryEmpList.value("salary").toFloat();

salary = salary + 1000;

qryUpdate.bindValue(":id",empId);

qryUpdate.bindValue(":salary",salary);

qryUpdate.exec();

if(!qryEmpList.next())

break;

}

theModel->query().exec();

QMessageBox::information(this,"notice","update salary finish",QMessageBox::Ok,QMessageBox::NoButton);

}

3、wDialogData类文件代码如下：

wDialogData.h

   #ifndef WDIALOGDATA_H

#define WDIALOGDATA_H

#include <QDialog>

#include <QSqlRecord>

namespace Ui {

class WDialogData;

}

class WDialogData : public QDialog

{

Q_OBJECT

public:

explicit WDialogData(QWidget *parent = 0);

~WDialogData();

void setUPdateRecord(QSqlRecord &recData);

void setInsertRecord(QSqlRecord &recData);

QSqlRecord getRecord();

private:

QSqlRecord mRecord;

private:

Ui::WDialogData *ui;

private slots:

void on_setPhoto_clicked();

void on_clearPhoto_clicked();

};

#endif // WDIALOGDATA_H

wDialogData.cpp

#include "wdialogdata.h"

#include "ui_wdialogdata.h"

#include <QDebug>

#include <QDate>

#include <QFileDialog>

WDialogData::WDialogData(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::WDialogData)

{

    ui->setupUi(this);

}

WDialogData::~WDialogData()

{

    delete ui;

}

void WDialogData::setUPdateRecord(QSqlRecord &recData)

{

    mRecord = recData;

    ui->spinEmpNo->setEnabled(false);

    setWindowTitle("update");

    ui->spinEmpNo->setValue(recData.value("id").toInt());

    ui->editName->setText(recData.value("name").toString());

    ui->spinAge->setValue(recData.value("age").toInt());

    QString strDate =  recData.value("birthday").toString();

    ui->EditBirth->setDate(QDate::fromString(strDate,"yyyy-MM-dd"));

    ui->comboSex->setCurrentText(recData.value("sex").toString());

    ui->spinSalary->setValue(recData.value("salary").toInt());

    QVariant va = recData.value("photo");

    if(!va.isValid())

        ui->labPhoto->clear();

    else

    {

        QByteArray data = va.toByteArray();

        QPixmap pic;

        pic.loadFromData(data);

        ui->labPhoto->setPixmap(pic.scaledToWidth(ui->labPhoto->size().width()));

    }

}

void WDialogData::setInsertRecord(QSqlRecord &recData)

{

    mRecord = recData;

    qDebug()<<recData.value("id").toInt();

    ui->spinEmpNo->setEnabled(true);

    setWindowTitle("insert a new record");

    ui->spinEmpNo->setValue(recData.value("id").toInt());

}

QSqlRecord WDialogData::getRecord()

{

    mRecord.setValue("id",ui->spinEmpNo->value());

    mRecord.setValue("name",ui->editName->text());

    mRecord.setValue("sex",ui->comboSex->currentText());

    mRecord.setValue("age",ui->spinAge->value());

    mRecord.setValue("birthday",ui->EditBirth->date());

    mRecord.setValue("salary",ui->spinSalary->value());

    return mRecord;

}

void WDialogData::on_setPhoto_clicked()

{

    QString aFile = QFileDialog::getOpenFileName(this,"select photo","","photo(*.jpg)");

    if(aFile.isEmpty())

        return;

    QByteArray data;

    QFile *file = new QFile(aFile);

    file->open(QIODevice::ReadOnly);

    data = file->readAll();

    file->close();

    mRecord.setValue("photo",data);

    QPixmap pic;

    pic.loadFromData(data);

    ui->labPhoto->setPixmap(pic.scaledToWidth(ui->labPhoto->size().width()));

}

void WDialogData::on_clearPhoto_clicked()

{

    ui->labPhoto->clear();

    mRecord.setNull("photo");

}