图书管理系统学生界面

#ifndef STUDENTWIN_H
#define STUDENTWIN_H
#include<QtGui>
class stdwin:public QWidget
{
Q_OBJECT
public slots:
void lookfor_slots(void);
public:
stdwin(QWidget *parent=0);
public:
QLabel std1,std2,std3;
QPushButton fbbegin;
QLineEdit stdfbno,stdfbname,stdfbpublication;
};

#endif // STUDENTWIN_H

#include "myWeiget.h"
#include "studentinfo.h"
#include "studentwin.h"
#include "dbawin.h"
#include "tushuku.h"
#include <QSqlDriver>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QtSql>

stdwin::stdwin(QWidget *parent)
:QWidget(parent),std1(QObject::tr("请输入书名"),this),
std2(QObject::tr("请输入书号"),this),std3(QObject::tr("请输入书的出版社"),this),
stdfbno(this),stdfbname(this),stdfbpublication(this),fbbegin(QObject::tr("查询"),this)
{
std1.setGeometry(40,30,110,30);
std2.setGeometry(40,90,110,30);
std3.setGeometry(40,150,140,30);

QFont font("Aharoni",26);
QFont font2("Aharoni",19);
stdfbname.setFont(font2);
stdfbno.setFont(font2);
stdfbpublication.setFont(font2);

fbbegin.setGeometry(QRect(150,200,100,40));
stdfbname.setGeometry(QRect(180,30,160,30));
stdfbno.setGeometry(QRect(180,90,160,30));
stdfbpublication.setGeometry(QRect(180,150,160,30));
connect(&fbbegin,SIGNAL(clicked(void)),this,SLOT(lookfor_slots(void)));
}
void stdwin::lookfor_slots()
{
QString bno=stdfbno.text().trimmed();
QString bpubl=stdfbpublication.text().trimmed();
QString bname = stdfbname.text();

if(bno.isEmpty())
{
if((!bname.isEmpty())&&(!bpubl.isEmpty()))
{
QSqlQuery query;
query.prepare("SELECT * FROM book WHERE 书名=:bname AND 出版社=:bpubl");
query.bindValue(":bname",bname);
query.bindValue(":bpubl",bpubl);
query.exec();
QSqlQueryModel *model = new QSqlQueryModel;
model->setQuery(query);
QTableView *view = new QTableView;
view->setModel(model);
view->show();}
if(bname.isEmpty()&&(!bpubl.isEmpty()))
{
QSqlQuery query;
query.prepare("SELECT * FROM book WHERE 出版社=:bpubl");
query.bindValue(":bpubl",bpubl);
query.exec();
QSqlQueryModel *model = new QSqlQueryModel;
model->setQuery(query);
QTableView *view = new QTableView;
view->setModel(model);
view->show();}
if((!bname.isEmpty())&&bpubl.isEmpty())
{
QSqlQuery query;
query.prepare("SELECT * FROM book WHERE 书名=:bname");
query.bindValue(":bname",bname);
query.exec();
QSqlQueryModel *model = new QSqlQueryModel;
model->setQuery(query);
QTableView *view = new QTableView;
view->setModel(model);
view->show();}
}
else
{
QSqlQuery query;
query.prepare("SELECT * FROM book WHERE 书号=:bno ");
query.bindValue(":bno",bno);
query.exec();
QSqlQueryModel *model = new QSqlQueryModel;
model->setQuery(query);
QTableView *view = new QTableView;
view->setModel(model);
view->show();
}
}