WPF DataTemplate and Binding - Is this possible in xaml ?

Question

I am DataTemplating a listbox's itemsource to display a series of comboboxes. I want to give the 'DisplayMemberPath' of the combo to a property, which is in a different source than its own 'ItemsSource'. (Assuming DisplayMemberPath is just a string representing name of a property, I am getting this from the user). I have achieved this with a CollectionViewSource, but all the comboboxes are displaying the same list.

What I am expecting to have after data templating is to have comboboxes display,

ComboboxInstance1.DisplayMemberPath =  PropertyMapOfEmployee in FilterControls[0]
ComboboxInstance2.DisplayMemberPath =  PropertyMapOfEmployee in FilterControls[1]

Is this possible to achieve in XAML ?

Thanks. Mani

UserControl:

<Resources>
    <CollectionViewSource x:Key="bindingSource" Source="{Binding BindingItems}"/>
    <CollectionViewSource x:Key="FilterSource" Source="{Binding FilterControls}"/>

 <DataTemplate DataType="{x:Type CustomTypes:FilterElement}">
      <ComboBox ItemsSource="{Binding Source={StaticResource bindingEmp}" 
   DisplayMemberPath="{Binding Source={StaticResource FilterSource}, Path=PropertyMapofEmployee}" />
  </DataTemplate>

  <Resources>

        -------------

            <DockPanel>
                    <ListBox x:Name="lstBox" ItemsSource="{Binding FilterControls}" />
            </DockPanel>

ViewModel:

List<FilterElement> FilterControls;
List<Employee> Employees

class FilterElement 
{
string Caption;
String PropertyMapofEmployee
}

Answer 1

<ComboBox ItemsSource="{Binding Source={StaticResource bindingEmp}"
          DisplayMemberPath="{Binding PropertyMapofEmployee}" />

Answer 2

I'm not sure you can do that in XAML. (Having the DisplayMemberPath point to a property that is on an object other than the DataContext). You may want to look at the RelativeSource Class to see if that would meet your needs.

Have you thought about providing a reference in your Employee object to the FilterElement and then hooking up to the binding the Employee.PropertyMapOfEmployee property that you've created?