DataGrid: Partial binding

Question

Let me try and state the simplest version of the question:

Can I have an UNBOUND dropdown-type column in my BOUND DataGrid?

Here is an example if the above statement is too abstract to understand:

A DataGrid named dgStudents that is bound to a DataTable named dtStudents, showing a few of the columns of the table, say Name, Age and City, all being simple DataGridTextColumns. I want to add a 4th column to my grid named say FavSports that is a simple dropdown type column, bound to a static list of common sports. The most important thing here is that (unlike other 3 columns) this dropdown column DOES NOT have a corresponding column in the DataTable. It'll just be required for the life of the DataGrid, so I'm not storing it anywhere.

I have tried the following:

<DataGridComboBoxColumn ItemsSource="{StaticResource Sports}">

where Sports is an array defined right within XAML:

<x:Array x:Key="Sports" Type="sys:String">
    <sys:String>Football</sys:String>
    <sys:String>Hockey</sys:String>
    <sys:String>Tennis</sys:String>
</x:Array>

Can't get this to work for the life of me. The dropdown does display and user can select a value out of it that does show after user moves to another cell, but that's about it. After user comes back to that cell, the drop-down appears empty and even if user then leaves the cell without clicking the dropdown, the previous value is gone.

Answer 1

If you just want to bind to your StaticResource, try this:

<DataGridComboBoxColumn ItemsSource="{Binding Source={StaticResource Sports}}">