WPF ListBox items command binding

Question

I got following listbox

<Page.DataContext>
    <self:NewUserViewModel/>
</Page.DataContext>
<ListBox x:Name="PermissionLbox"  ItemsSource="{Binding ListFromDataContext}" Height="75" Margin="10,117,10,0" VerticalAlignment="Top">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <CheckBox Content="{Binding .}"></CheckBox>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

Why if I change CheckBox definition to:

<CheckBox Command={Binding CommandFromDataContext} Content="{Binding .}"></CheckBox><CheckBox   Content="{Binding .}"></CheckBox>

name CommandFromDataContex cannot be resolved although CommandFromDataContext exists in NewUserViewModel. The ListFromDataContext is a property of NewUserViewModel, Command either, but Command is not resolved.

score 4 · Accepted Answer · edited May 23 '17 at 12:08

4

The datacontext of the checkbox isnt the viewmodel any more, but rather the individual item it instances in the listbox.

You need to bind to a RelativeSource and Path to get to the ViewModel again.

See existing answer for details.

edited May 23 '17 at 12:08

Community

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answered Jun 10 '16 at 14:21

Mattias Åslund

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I've appended a link. See top voted answer for example. – Mattias Åslund Jun 10 '16 at 14:26

WPF ListBox items command binding

1 Answers1