Binding DataGridComboBoxColumn

Question

I am trying to bind ObservableCollection of T to DataGridComboBoxColumn of DataGrid.
DataGrid definition is :

Answer 1

Since RoadTypes isn't a simple list of strings you need to tell your combobox what property it needs to display in the ComboBox. Try adding

DisplayMemberPath="Name" 

to your combobox declartion

--

Update:

Okay, this is a known "feature" with WPF datagrids. The issue is that the DataGridComboBox doesn't have the DataContext of the DataGrid. I modified the binding for the ComboBox to look like this:

<DataGridComboBoxColumn DisplayMemberPath="Name">
     <DataGridComboBoxColumn.ElementStyle>
             <Style>
                <Setter Property="ComboBox.ItemsSource" Value="{Binding Path=RoadTypes}" />
             </Style>
      </DataGridComboBoxColumn.ElementStyle>
      <DataGridComboBoxColumn.EditingElementStyle>
              <Style>
                  <Setter Property="ComboBox.ItemsSource" Value="{Binding Path=RoadTypes}" />
              </Style>
       </DataGridComboBoxColumn.EditingElementStyle>
  </DataGridComboBoxColumn>

I modified the code you provided in your download link and the combobox items were displayed when I opened the combobox dropdown.

Check out some of these links for further clarification:

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/b4b13a72-47f9-452f-85c6-6c4b5b606df5/

How to bind collection to WPF:DataGridComboBoxColumn

Excedrin headache #3.5.40128.1: Using combo boxes with the WPF DataGrid

What led me to look at all of these sites is looking at the Output window and noticing the error message System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. message