When setting contextmenu via style setter, PlacementTarget property is null - wpf

Question

In my application, I have a view (ListView) and a view model. Inside view model, I have 2 properties: first is a list of items, and the second is a command. I want to display items (from first property) inside ListView. In addition, I want to have for each one a context menu, where clicking on it will activate a command (from second property).
Here is a code of my view model:
public class ViewModel
{
public IEnumerable Items
{
get
{
return ...; //returns a collection of items
}
}
public ICommand MyCommand //this is a command, I want to be able execute from context menu of each item
{
get
{
return new DelegateCommand(new Action<object>(delegate(object parameter)
{
//here code of the execution
}
), new Predicate<object>(delegate(object parameter)
{
//here code of "can execute"
}));
}
}
Now the XAML part:
<ListView ItemsSource="{Binding Items}">
<ListView.Resources>
<commanding:CommandReference x:Key="myCommand" Command="{Binding MyCommand}"/>
</ListView.Resources>
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock
Text="{Binding Name}"
/>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="ContextMenu">
<Setter.Value>
<ContextMenu>
<MenuItem
Header="Remove from workspace"
Command="{StaticResource myCommand}"
CommandParameter="HERE I WANT TO PASS THE DATA CONTEXT OF THE ListViewItem"
/>
</ContextMenu>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
</ListView>
The problem: until I actually opening context menu, the PlacementTarget of the context menu is null. I need somehow to receive data context of the clicked ListViewItem into "CanExecute" of the command, BEFORE the command being called - and I truly wish to make everything in the XAML, without handling any callbacks in code behind.
Thank you in advance.

Answer 1

If you are looking for ListViewItem's DataContext you can do this:
CommandParameter="{Binding}"
Edit - Here is what I tried:
public partial class MainWindow : Window
{
private ObservableCollection<Person> list = new ObservableCollection<Person>();
public MainWindow()
{
InitializeComponent();
list.Add(new Person() { Name = "Test 1"});
list.Add(new Person() { Name = "Test 2"});
list.Add(new Person() { Name = "Test £"});
list.Add(new Person() { Name = "Test 4"});
this.DataContext = this;
}
public static ICommand MyCommand //this is a command, I want to be able execute from context menu of each item
{
get
{
return new DelegateCommand<Person>(
a => Console.WriteLine(a.Name),
a => true);
}
}
public ObservableCollection<Person> Items
{
get
{
return this.list;
}
}
}
public class Person
{
public string Name { get; set; }
}
And the xaml:
<Window x:Class="ListView1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ListView1="clr-namespace:ListView1" Title="MainWindow" Height="350" Width="525">
<Grid>
<ListView ItemsSource="{Binding Items}">
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="ContextMenu">
<Setter.Value>
<ContextMenu>
<MenuItem Header="Remove from workspace" Command="{x:Static ListView1:MainWindow.MyCommand}" CommandParameter="{Binding}" />
</ContextMenu>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
</ListView>
</Grid>
</Window>