WPF binding question

Question

For example, I have:

MainWindows.cs

public partial class MainWindow : Window { public List<Player> List; public MainWindow() { InitializeComponent(); List = new List<Player>() { new Player() {Id = 1, Name = "Tom"}, new Player() {Id = 2, Name = "Bob"}, new Player() {Id = 3, Name = "Any"}, }; comboBox1.DataContext = List; } public class Player { public string Name { get; set; } public int Id { get; set; } } }

XAML: <ComboBox ItemsSource="{Binding}" DisplayMemberPath="Name"/>

How I can (need to) set List as a DataContext from the XAML? (and delete "comboBox1.DataContext = List" from the code-behind)

Elad Katz · Accepted Answer · 2011-03-31 16:27:35Z

unless you're using MVVM u don't need to do that, but in any case, use can create the List as a property of the window like so

public List<Player> List {get;set;}

and then in XAML u can use RelativeSource to bind to the window:

<ComboBox ItemsSource="{Binding Path=List, RelativeSource={RelativeSource AncestorType=Window, Mode=FindAncestor}}" DisplayMemberPath="Name"/>

alternatively, u can give a name to your window:

<Window .... x:Name="MyWindow" ..>

and then use ElementName in the binding, like so:

<ComboBox ItemsSource="{Binding Path=List, ElementName=MyWindow}" DisplayMemberPath="Name"/>

dain · Accepted Answer · 2011-03-31 16:27:28Z

Quick fix is setting your ComboBox's ItemsSource directly in code-behind (instead of DataContext), but in order to be able to use proper bindings you'll need a ViewModel or at least a XAML DataContext.

Also you should pick some more unique name than List for your List, like for example Players – it's good practice to use the plural form of the type of Objects in the List.

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