xaml databinding in c#

Question

I am pretty sure the code looks right based on an example I am mimicking, but the combo box is empty when I run the program. What am I doing wrong here?

xaml:

 <ComboBox Grid.Column="1" Width="200" Height="20" x:Name="cBox" ItemsSource="{Binding DummyClassCollection}" DisplayMemberPath="DisplayValue" />

Code Behind:

 public partial class PlayerPromptPage : Page { public PlayerPromptPage() { InitializeComponent(); } public ObservableCollection<DummyClass> DummyClassCollection { get { return new ObservableCollection<DummyClass> { new DummyClass{DisplayValue = "Item1", Value = 1}, new DummyClass{DisplayValue = "Item3", Value = 3}, new DummyClass{DisplayValue = "Item2", Value = 2}, new DummyClass{DisplayValue = "Item4", Value = 4}, }; } } } public class DummyClass { public int Value { get; set; } public string DisplayValue { get; set; } }

That's it. Thank you!!!!! add it as an answer and I'll mark it correct. — nikotromus
– nikotromus, Commented Feb 4, 2018 at 18:14

René Vogt · Accepted Answer · 2018-02-05 14:28:21Z

You need to set the DataContext for the page.
This can easily be done in the constructor:

public PlayerPromptPage() { InitializeComponent(); DataContext = this; }

Alternativly you can set the DataContext in XAML:

<Window ... DataContext="{Binding RelativeSource={RelativeSource Self}}"

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