QtSQL SERVER连接数据库

void QInstallWidget::openDatabase()
{
    QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");  //连接SQL SERVER
    db.setDatabaseName(QString("DRIVER={SQL SERVER};"  
                               "SERVER=%1;"  
                               "DATABASE=%2;"  
                               "UID=%3;"  

                               "PWD=%4;").arg("localhost")  //本地数据库

                       .arg("Module")  //数据库名称
                       .arg("sa")  //数据库账号
                       .arg("123456"));  //数据库密码
    if (!db.open())  
    {  
 
     //   QMessageBox::warning(0, qApp->tr("Cannot open database"),  
        //        db.lastError().databaseText(), QMessageBox::Cancel);  
    }  
    else  
    {  
        qDebug()<<"Connect to Database Success!";  
    }  
}