connecting to database when a form loads using signals and slots

[Lasith]

I have 2 forms in my app namely MainWindow and Display! The MainWindow has the database connection method named getConnection (works successfully). When I fill database details and click a button in the MainWindow form the Display form is loaded! I want the Display form to have the getconnection method when the form loads! For that I use Signal and slot concept!

following is my getconnection method(works)

void MainWindow::getValues(){
mydb.setDatabaseName(ui->sname->text());
mydb.setUserName(ui->uname->text());
mydb.setPassword(ui->pword->text());
mydb.setPort(ui->port->text().toInt());
mydb.setHostName(ui->ip->text());

}

The following code is from my Display.cpp

Display::Display(QWidget *parent) :
QDialog(parent),
ui(new Ui::Display)
{
ui->setupUi(this);
connect(ui->Display,SIGNAL(accepted()),MainWindow,SLOT(getConnection));

}

But the connection does not seem to exist! How can I adjust this to get the database connection?

[SGaist]

Hi,

Besides the fact that the connect statement is wrong (you can't connect a class), it should be in your MainWindow object. There's no reason for "Display" to have any knowledge of the MainWindow class.

[mostefa]

@SGaist said in connecting to database when a form loads using signals and slots:

Hi,

Besides the fact that the connect statement is wrong (you can't connect a class), it should be in your MainWindow object. There's no reason for "Display" to have any knowledge of the MainWindow class.

I think that this post is duplicate

https://forum.qt.io/topic/83307/qsqlquery-prepare-database-not-open

?

[kshegunov]

@mostefa said in connecting to database when a form loads using signals and slots:

I think that this post is duplicate

Strictly speaking it isn't, although it's quite similar.