C#C
C#•16mo ago•
1 reply
Tiranozavr

WPF: Binding selected item of ComboBox inside ItemsControl

Hello, I'm currently exploring WPF and kinda stuck with one particular case.

I have 
ItemsControl
 with 
ItemTemplate
 being a 
ComboBox
:
<ItemsControl ItemsSource="{Binding Values}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <ComboBox Width="150"
                          ItemsSource="{Binding DataContext.Items, RelativeSource={RelativeSource AncestorType=Window}}"
                          SelectedItem="{Binding .}">
                </ComboBox>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

Values
 is a collection in my view model: 
public ObservableCollection<ComboBoxItemModel> Values { get; set; };

ItemsSource
 for comboboxes is a fixed 
List<ComboBoxItemModel>


I can add and remove items and this changes will be reflected in my view: comboboxes will be added and removed. But if I change selected item in a combobox, this won't do anything with the collection.

I've figured out I can create a wrapper class:
public class Wrapper
{
    public ComboBoxItemModel Model {get; set; }
}

And change 
Values
 to be a collection of type 
Wrapper
 and update my binding to be:
SelectedItem="{Binding Model}"


This way changing selected item of any combobox will update 
Model
 field of corresponding 
Wrapper
 object in my collection. So far so good, but it seems kinda hacky. Am I doing it right? Is the 
Wrapper
 class mandatory in this case?
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