I am creating a program in Windows Forms and on my page I put a Tab Control with one tab to register and insert the data in MySQL and the other to see the data registered in a ComboBox. p>
But when I insert one data from the registration tab and mute it to the other, my ComboBox does not have the data entered, then I have to close the program and open it again to appear in the ComboBox.
How do I when I insert into a flap it recognizes the other?
This is exactly the expected behavior. Once you load ComboBox , you'll need to load the data back into it when you make new inserts.
There are several ways to handle this: you can update when adding an item, you can update when you change the tab and so on.
I advise you to reload the combo whenever the user switches from the first tab to the second.
To do this, you must use the Selecting " of TabControl . Note: Do not forget to inscribe the event in the component.
The code would be more or less this
void tabControl_Selecting(object sender, TabControlCancelEventArgs e)
{
TabPage tabPageSelecionada = (sender as TabControl).SelectedTab;
//troque tabPageConsulta pelo "Name" previamente definido para a tab page
if(tabPageSelecionada == tabPageConsulta)
{
//Buscar os dados no banco e recarregar a combobox
}
}