Question

Is there any way to prevent changing the selected item in a ComboBox only if for certain conditions? I want to allow update the selected item’s displayValue in the ComboBox. But I don’t want user to change the selected item when it’s being updated. This is a windows application.

Answer 1

Inside your class:

private int _selectedIndex = 0;

Inside your form load method:

comboBox1.Enter += new EventHandler(comboBox1_Enter);
comboBox1.SelectedIndexChanged += new EventHandler(comboBox1_SelectedIndexChanged);

Then the rest of the code:

protected void comboBox1_SelectedIndexChanged(object sender, EventArgs e) {
    if (true) { // Add your validation or certain condition here.
        (sender as ComboBox).SelectedIndex = _selectedIndex;
    }
}

protected void comboBox1_Enter(object sender, EventArgs e) {
    _selectedIndex = (sender as ComboBox).SelectedIndex;
}