MonthCalendarCommands | Infragistics Forums

Nothing that you would do using triggers. You could write your own command that will set the SelectedDate (and ActiveDate) and then invoke the MaskedEditorCommands.ToggleDropDown. e.g.

    public class CustomMonthCalendarCommands
    {
        static CustomMonthCalendarCommands()
        {
            CommandManager.RegisterClassCommandBinding( typeof( XamMonthCalendar ), new CommandBinding( SelectAndActivateDate, new ExecutedRoutedEventHandler( OnExecuted ), new CanExecuteRoutedEventHandler( OnCanExecute ) ) );
        }

        private static void OnExecuted(object sender, ExecutedRoutedEventArgs e)
        {
            if ( e.Command == SelectAndActivateDate )
            {
                var mc = sender as XamMonthCalendar;
                MonthCalendarCommands.ActivateDate.Execute( e.Parameter, e.OriginalSource as IInputElement );
                mc.SelectedDate = mc.ActiveDate;
                MaskedEditorCommands.ToggleDropDown.Execute( null, e.OriginalSource as IInputElement );
            }
        }

        private static void OnCanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            if ( e.Command == SelectAndActivateDate )
            {
                e.CanExecute = MonthCalendarCommands.ActivateDate.CanExecute( e.Parameter, e.OriginalSource as IInputElement );
                e.Handled = true;
            }
        }

        public static readonly RoutedCommand SelectAndActivateDate = new RoutedCommand("SelectAndActivateDate", typeof(CustomMonthCalendarCommands));
    }

Then you would reference that command. You might also leave the content set up the way it was but bind to the CommandParameter which has the date to display.

                <igWindows:StringFormatConverter x:Key="StrFormatConv" />

                <Style TargetType="{x:Type Button}" x:Key="{x:Static igEditors:XamMonthCalendar.TodayButtonStyleKey}">
                    <Setter Property="Command" Value="{x:Static local:CustomMonthCalendarCommands.SelectAndActivateDate}" />
                    <Setter Property="Content">
                        <Setter.Value>
                            <MultiBinding Converter="{StaticResource StrFormatConv}" Mode="OneWay">
                                <Binding Path="Value" Source="{x:Static igEditors:Resources.TodayButtonCaption}" />
                                <Binding Path="CommandParameter" RelativeSource="{RelativeSource Self}" />
                            </MultiBinding>
                        </Setter.Value>
                    </Setter>