Question

I’m having a look at this MVVM stuff and I’m facing a problem.

The situation is pretty simple.

I have the following code in my index.xaml page

    <Grid>     <ItemsControl ItemsSource='{Binding}'>         <ItemsControl.ItemTemplate>             <DataTemplate>                 <view:MovieView ></view:MovieView>             </DataTemplate>         </ItemsControl.ItemTemplate>     </ItemsControl> </Grid> 

and in my index.xaml.cs

…

InitializeComponent(); base.DataContext = new MovieViewModel(ent.Movies.ToList()); ….

and here is my MoveViewModel

    public class MovieViewModel {     readonly List<Movies> _m;     public ICommand TestCommand { get; set; }     public MovieViewModel(List<Movies> m)     {         this.TestCommand = new TestCommand(this);         _m = m;     }     public List<Movies> lm     {         get         {             return _m;         }     } } 

finally

here is my control xaml MovieView

    <Grid>     <Grid.RowDefinitions>         <RowDefinition Height='Auto' />         <RowDefinition Height='Auto' />         <RowDefinition Height='Auto' />     </Grid.RowDefinitions>     <Grid.ColumnDefinitions>         <ColumnDefinition Width='Auto'></ColumnDefinition>         <ColumnDefinition Width='Auto'></ColumnDefinition>     </Grid.ColumnDefinitions>     <Label VerticalAlignment='Center' Grid.Row='0' Grid.Column='0'>Title :</Label><TextBlock VerticalAlignment='Center' Grid.Row='0' Grid.Column='1' Text='{Binding Title}'></TextBlock>       <Label VerticalAlignment='Center' Grid.Row='1' Grid.Column='0'>Director :</Label><TextBlock VerticalAlignment='Center' Grid.Row='1' Grid.Column='1' Text='{Binding Director}'></TextBlock>     <Button Grid.Row='2' Height='20' Command='{Binding Path=TestCommand}' Content='Edit' Margin='0,4,5,4' VerticalAlignment='Stretch' FontSize='10'/> </Grid> 

So the problem I have is that if I set ItemsSource at Binding

it doesn’t make anything

if I set ItemsSource='{Binding lm}’

it populates my itemsControl but the Command (Command='{Binding Path=TestCommand}’ ) doesn’t not work.

Of course it doesn’t not work because TestCommand doesn’t not belong to my entity object Movies.

So finally my question is,

what do I need to pass to the ItemsControl to make it working?

Thx in advance

Answer 1

Got it working

here is the thing

 <ItemsControl DataContext='{Binding}' ItemsSource='{Binding lm}'>   Command='{Binding Path=DataContext.TestCommand, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}'  

so the RelativeSource was the thing I’ve missed.

if somebody has a good explaination of this, I would be definitely happy.