Exclude enum value on binding.

Question

Can I somehow exclude an enum value from taking part in binding to control ?

Say I have :

enum TEST{

Undefined,

Top,

Bottom

}

I would like to exclude Undefined when binding . Can I do this ?

Answer 1

<Page x:Class="WPFTest.Page1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Page1">

<StackPanel x:Name="stack">

<ComboBox x:Name="combo"/>

</StackPanel>

</Page>

using System;

using System.Collections.Generic;

using System.Windows;

using System.Linq;

using System.Windows.Controls;

namespace WPFTest

{

/// <summary>

/// Interaction logic for Page1.xaml

/// </summary>

public partial class Page1 : Page

{

public Page1()

{

InitializeComponent();

string[] TestNames = Enum.GetNames(typeof(TEST));

var list = from test in TestNames where test != "Undefined" select test;

combo.ItemsSource = list;

}

enum TEST

{

Undefined,

Top,

Bottom

}

}

}

---

Bigsby, Lisboa, Portugal

Answer 2

Hi,

There are quite a few different ways which you can bind an enum to a control - if you let us know what technique you are using we could suggest an appropriate solution.

Colin E.

Answer 3

Edit:

There's a problem with the approach given by Bigsby : When I'm binding the Combo's SelectedValueProperty to a another object that has a property of type TEST (the enum) . The SelectedValue of the combo is null - and that because it's datasourse is a list of strings not the enum itself.

Any suggestions ?



-----
I was using an ObjectDataProvider.

However, if there is another way - I'll be happy to hear about it :).

Answer 4

This :

from test in TestNames where test != "Undefined" select Enum.Parse(typeof(Test),test)

Worked like a charm :D. Thanks everybody.

PS: @Colin - if there's another way, please post it - thanks.