Binding objects defined in code-behind

user_109112 0
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I have some object that is instantiated in code behind, for instance, the XAML is called window.xaml and within the window.xaml.cs

protected Dictionary<string, myClass> myDictionary;

How can I bind this object to, for example, a list view, using only XAML markups?

Update:

(This is exactly I have in my test code):

<Window x:Class="QuizBee.Host.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="{Binding windowname}" Height="300" Width="300"
    DataContext="{Binding RelativeSource={RelativeSource Self}}">
    <Grid>
    </Grid>
</Window>

And in codebehind

public partial class Window1 : Window
{
    public const string windowname = "ABCDEFG";

    public Window1()
    {
        InitializeComponent();
    }
}

Suppose the title should become "ABCDEFG" right? but it ends up showing nothing.

binding wpf .net c#
11 Answers

You can try x:Reference trick

<Window ... x:Name="myWindow"><ListBox ItemsSource="{Binding Items, Source={x:Reference myWindow}}" /></Window>
user_28063770

That's my way to bind to code behind (see property DataTemplateSelector)

public partial class MainWindow : Window
{
  public MainWindow()
  {
    this.DataTemplateSelector = new MyDataTemplateSelector();

    InitializeComponent();

    // ... more initializations ...
  }

  public DataTemplateSelector DataTemplateSelector { get; }

  // ... more code stuff ...
}

In XAML will referenced by RelativeSource via Ancestors up to containing Window, so I'm at my Window class and use the property via Path declaration:

<GridViewColumn Header="Value(s)"
                CellTemplateSelector="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataTemplateSelector}"/>

Setting of property DataTemplateSelector before call InitializeComponent depends on missing implementation of IPropertyChanged or use of implementation with DependencyProperty so no communication run on change of property DataTemplateSelector.

user_17342010
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