How Do You Bind To An Item In A Dictionary?

Question

I'm using the RadCarousel control from Telerik in a WPF application with C#. RadCarousel is similar to a GridView in that it binds to a collection and show's each item in the collection (so my question isn't specific to Telerik or RadCarousel).

I'm using a DataTemplate to specify how each record should get displayed.

If I do this it work's fine:

<DataTemplate>
    <TextBlock Text="{Binding Path=oMySubObject.TheAmount}" />
</DataTemplate>

But what if I need to point to an item in a dictionary?

<DataTemplate>
    <TextBlock Text="{Binding Path=myDictionaryOfSubObjects[TheCurrentIndex].TheAmount}" />
</DataTemplate>

This I can't get working and don't know how. Basically...I need the index to be specified at runtime and when it gets updated, the binding updates.

Any advice?

Answer 1

<Window.Resources>
  <NAMESPACEWHERECONVERTERRESIDES:DictionaryConverter x:Key="cDictionaryConverter"/>
</WindowResources>


    <TextBlock Text="{Binding Path=myDictionaryOfSubObjects, Converter={StaticResource cDictionaryConverter}}"/>

// Something like this:

[ValueConversion(typeof(Dictionary), typeof(string))]
public class DictionaryConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
         Dictionary<type, type> dict = value as Dictionary<type, type>; 
         return dict[CurrentIndex].TheAmount; 
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return 0;
    }
}