How do I bind an enum to a ComboBox and hide a certain value in C#

Question

I have an enum in the form of:

public enum BlueOrRed { None, Blue, Red}

Currently I am binding that to a ComboBox in Code because the binding is dependent on a selection in another ComboBox:

if (OtherComboBox.SelectedItem == Color.BlueOrRed)
{
    ThisComboBOx.ItemsSource = Enum.GetValues(typeof(BlueOrRed));
}
else ...

I need the option, that BlueOrRed could also be None in the code behind. But I don't want to display that option in the ComboBox.

I am aware of a similar Question, but that answer unfortunately doesn't really aplly to my problem.

`ItemsSource = new BlueOrRed[] { BlueOrRed.Blue, BlueOrRed.Red };` — Clemens, Jul 24 '20 at 08:37
It could be an [answer](https://stackoverflow.com/a/3591923/11404117). But I have not tested it. — Vadym Polshcha, Jul 24 '20 at 08:43

score 1 · Accepted Answer · answered Jul 24 '20 at 09:54

The GetValues method will return all of these constants as an array. Instead create a custom list.

ThisComboBOx.ItemsSource = new List<BlueOrRed> {BlueOrRed.Blue, BlueOrRed.Red};

If you do not want to create the list yourself, you can also exclude the None constant using Linq.

ThisComboBOx.ItemsSource = ((BlueOrRed[]) Enum.GetValues(typeof(BlueOrRed))).Except(new[] { BlueOrRed.None });

1 Answers1