Question

I’ve got problem to define items in my ItemsControls (or in my view or viewModel). May be I don’t know something about mvvm, but here is the question.
I have DataTemplate defined as

<DataTemplate>
    <Expander>
        <Expander.Header>
            <StackPanel>
            <TextBlock Margin="2" Text="{Binding Name}" />
            <TextBlock>                
                <Hyperlink>
                    <Run Text="Delete group" />
                </Hyperlink>
            </TextBlock>
            </StackPanel>
        </Expander.Header>
        <Expander.Content>
            blah-blah-blah
        </Expander.Content>
     </Expander>
 </DataTemplate>

I have a lot of Expanders, each of them have a Hyperlink. And I want the Hyperlink to delete the group – i.e. remove corresponding Expander. I have read about searching on DataTemplate with Visual and Logical – TreeHelper, but it is a bad way to solve my problem – it doesn’t follow mvvm. I know that I need to write a Commmand for the Hyperlink, but how can I retrieve Expander, which I need to delete, and satisfy mvvm – that’s the question.

Any advice, any suggestion…

Answer 1

But, if you are can’t create static ICommand property for some develop reasons, you should use RelativeSource to find ancestor, which have DataContext set to ViewModel, which have this command.

<Hyperlink Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, 
                                              AncestorType=ItemsControl}, 
                    Path=DataContext.DeleteFileGroup}" 
           CommandParameter="{Binding}">
              <Run Text="Delete group"/>
</Hyperlink>