Question

I’m using the M-V-VM pattern.
I have a ViewModel and an ObservableCollection of DataModels.
The list of DataModels are data-bound to a DataGrid.

When the grid is rendered, i would like one of the fields to be a ComboBox (let’s say a list of string names).

This string name list is a common list that applies to all rows (i.e. DataModels).

Is there a way to bind a grid’s field-level row property to the parent ViewModel?

One possible solution that i’d like to avoid is this:
Have a get-property in the DataModel that essentially returns the ViewModel’s property (the list of string names).

Answer 1

you can do it with a static resource.
E.g. define your static resource in xaml

<UserControl.Resources>
   <mynamespace:MyViewModel x:Key="MyViewModel" />
</UserControl.Resources>

Now you can reference this resource in your user control:

<Controls::DataGrid DataContext="{StaticResource MyViewModel}" ItemSource="{Binding MyItems}" ...
  <Controls:DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
      <ComboBox ItemsSource="{Binding MyItems, Source={StaticResource MyViewModel}" DisplayMemberPath="MyString" /> <!-- This does the job with the combo box and the strings -->
    </DataTemplate>
  </Controls:DataGridTemplateColumn.CellTemplate>
</Controls:DataGrid>

Hope this helps,

BR,

TJ