将ComboBoxColumn绑定到WPF DataGrid中DataGrid的ItemsSource的集合

Question

Please help me to figure out how to work with ComboBoxColumn in WPF's DataGrid. I'm trying to create a list of devices, where each device have dynamic list of states in field "log".

<DataGrid AutoGenerateColumns="False" Margin="12,6,12,12" Name="dataGrid1" Grid.Row="1"  SelectionUnit="FullRow">
    <DataGrid.Columns>
            ...
         <DataGridComboBoxColumn Header="Log" 
                                 ItemsSource="{Binding log, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:Device}}}"/>
    </DataGrid.Columns>
</DataGrid>

---

public partial class MainWindow : Window
{
    public ObservableCollection<Device> devices;
    ...
}

public MainWindow() 
{
    ...
    dataGrid1.ItemSource = devices;
}

public class Device : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
    public Device() {log = new ObservableCollection<string>();}
    ...
    private ObservableCollection<string> _log;
    public ObservableCollection<string> log { get { return _log; } 
                                              set { _log = value; OnPropertyChanged("log"); } }
}

Can you share any suggestions: How can i show in each combobox in datagrid list "log" of each object?

Answer 1

MSDN: DataGridComboboxColumns says:

To populate the drop-down list, first set the ItemsSource property for the ComboBox by using one of the following options:

• A static resource. For more information, see StaticResource Markup Extension.
• An x:Static code entity. For more information, see x:Static Markup Extension.
• An inline collection of ComboBoxItem types.

So basically to just bind to data object`s collection property it`s better to use DataGridTemplateColumn :

<DataGridTemplateColumn Header="Log">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
             <ComboBox ItemsSource="{Binding log}" />
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

This type of column gives you some more posibilities for templating too.