Question

I have a ComboBox bound to an ObservableCollection of decimals. What is the correct way to apply our currency converter to the items?

Edit:

a) I have an existing currency converter that I must use b) .NET 3.0

Do I need to template the items?

Answer 1

Your best bet if you have some code to do the conversion is indeed to run each item through an IValueConverter via a template.

<Window.Resources>     <my:CurrencyConverter x:Key='currencyConverter' />      <DataTemplate x:Key='thingTemplate' DataType='{x:Type my:Thing}'>         <TextBlock             Text='{Binding Amount,Converter={StaticResource currencyConverter}}' />     </DataTemplate> </Window.Resources>  <ComboBox     ItemSource='... some list of Thing instances ...'     ItemTemplate='{StaticResource thingTemplate}' /> 

So you just define your CurrencyConverter class such that it implements IValueConverter and calls your code to turn the given amount into a formatted string.