connecting to database when a form loads using signals and slots
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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?
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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.
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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.
@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
?
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@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
?
@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.
