Question

I am having problem with DataGrid navigation using arrow keys when my DataGrid is displayed initially. Up/down keys do not change the current row. Only after I click on a row do the keys start working. Has something to do with the focus, but I do not know how to set focus programmatically.

<DataGrid ItemsSource="{Binding Tasks}"
              AutoGenerateColumns="False"
              SelectedItem="{Binding SelectedTask, Mode=TwoWay}"
              SelectionMode="Single">
      <DataGrid.Columns>
        <DataGridTextColumn Header="Title"
                            Binding="{Binding Title}" />
      </DataGrid.Columns>
</DataGrid>

class MainViewModel : ModelBase
{
    private readonly ObservableCollection<TaskModel> tasks = new ObservableCollection<TaskModel>();
    public MainViewModel()
        : base()
    {
        this.Tasks.Add(new TaskModel("task0"));
        this.Tasks.Add(new TaskModel("task1"));
        this.Tasks.Add(new TaskModel("task2"));
        this.SelectedTask = this.Tasks[0];
    }<br>
    public TaskModel SelectedTask { get; set; }
    public ObservableCollection<TaskModel> Tasks
    {
        get { return this.tasks; }
    }
}

Answer 1

to answer my own question about how to set the initial focus: http://msdn.microsoft.com/en-us/library/system.windows.input.focusmanager.focusedelement.aspx