Hey guys,

I have a problem with the CalendarDayStyleSelector of a XamMonthCalendar.

I looked into the example and tried to build a same function as there.

My problem is, that I not get the StyleSelector event fired even once.

I want to let holiday days have a different color and the ability, to repaint these days, too. Because a user can double click a day and change its state from a normal day to holiday or the other way.

Because my problem with the StyleSelector I tried the LoadedEvent of the CalendarDays but not get them to reload if the Data changes.

I completely not get, why the StyleSelector not fires.

Here are my code samples:

<metro:MetroWindow x:Class="Dispo.Betriebskalender"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:metro="http://metro.mahapps.com/winfx/xaml/controls"
    xmlns:igWindows="http://infragistics.com/Windows"
    xmlns:igThemes="http://infragistics.com/Themes"
    xmlns:dispo="clr-namespace:Dispo"
    xmlns:converters="clr-namespace:MaterialDesignThemes.Wpf.Converters;assembly=MaterialDesignThemes.Wpf"
    xmlns:wpf="http://materialdesigninxaml.net/winfx/xaml/themes"
    xmlns:ig="http://schemas.infragistics.com/xaml"
    xmlns:igPrim="http://schemas.infragistics.com/xaml/primitives"
    xmlns:igDP="http://schemas.infragistics.com/xaml/wpf"
    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    xmlns:system="clr-namespace:System;assembly=mscorlib"
    xmlns:local="clr-namespace:Dispo"
    xmlns:igEditors="http://infragistics.com/Editors"
    WindowTransitionsEnabled="False"
    TextElement.Foreground="{DynamicResource MaterialDesignBody}"
    Background="{DynamicResource MaterialDesignPaper}"
    TextElement.FontWeight="Medium"
    TextElement.FontSize="15"
    Style="{StaticResource Roboto}"
    Title="Betriebskalender"
    WindowStartupLocation="CenterOwner"
    Closing="MetroWindow_Closing"
    >
    <metro:MetroWindow.TitleTemplate>
        <DataTemplate>
            <TextBlock 
                Text="Betriebskalender"
                TextTrimming="CharacterEllipsis"
                VerticalAlignment="Center"
                Margin="12 -1 8 0"
                FontWeight="Regular"
                FontSize="18"
                />
        </DataTemplate>
    </metro:MetroWindow.TitleTemplate>
    <metro:MetroWindow.Resources>
        <ResourceDictionary>
            <Style x:Key="Feiertag"
                   TargetType="{x:Type igEditors:CalendarDay}">
                <Setter Property="Background" Value="Red">
                </Setter>
            </Style>
        </ResourceDictionary>
    </metro:MetroWindow.Resources>
    <Grid
        >
        <Grid.Resources>
            <ResourceDictionary>
                <ResourceDictionary.MergedDictionaries>
                    <igThemes:ResourceWasher 
                        WashMode="HueSaturationReplacement" 
                        WashColor="#4CAF50" 
                        AutoWash="True"
                        >
                        <igThemes:ResourceWasher.SourceDictionary>
                            <ResourceDictionary>
                                <ResourceDictionary.MergedDictionaries>
                                    <igThemes:EditorsMetro/>
                                </ResourceDictionary.MergedDictionaries>
                            </ResourceDictionary>
                        </igThemes:ResourceWasher.SourceDictionary>
                    </igThemes:ResourceWasher>
                </ResourceDictionary.MergedDictionaries>
            </ResourceDictionary>
        </Grid.Resources>
        <Grid.RowDefinitions>
            <RowDefinition Height="100*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="100*"/>
        </Grid.ColumnDefinitions>
        <igDP:XamMonthCalendar
            Name="xcCalendar"
            Grid.Row="0"
            Grid.Column="0"
            CalendarDimensions="4,4"
            TodayButtonVisibility="Collapsed"
            CalendarDayStyleSelector="{Binding Path=DayStyleSelector, RelativeSource={RelativeSource AncestorType=Page}}"
            >
            
        </igDP:XamMonthCalendar>
    </Grid>
</metro:MetroWindow>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Infragistics.Windows.Editors;
using MaterialDesignThemes.Wpf;

namespace Dispo
{
    /// <summary>
    /// Interaktionslogik für Betriebskalender.xaml
    /// </summary>
    public partial class Betriebskalender
    {

        public bool Shown = false;

        clsDaten Daten = new clsDaten();

        public List<DateTime> DatenFeiertage { get; set; }
        public List<DateTime> DatenArbeitsfreieTage { get; set; }

        public List<DateTime> selDates;

        private StyleSelector _dayStyleSelector;

        public Betriebskalender()
        {
            this._dayStyleSelector = new CalendarDayStyleSelector(this);

            InitializeComponent();

            DatenLaden();

        }

        public StyleSelector DayStyleSelector
        {
            get { return this._dayStyleSelector; }
        }

        public void DatenLaden()
        {

            DateTime tempStartdatum = DateTime.Today;
            DateTime tempEnddatum = DateTime.Today.AddYears(2);

            xcCalendar.MinDate = tempStartdatum;
            xcCalendar.MaxDate = tempEnddatum;

            DataTable dtFeiertage = Daten.GibFeiertage(tempStartdatum, tempEnddatum);
            DataTable dtArbeitsfreieTage = Daten.GibArbeitsfreieTage(tempStartdatum, tempEnddatum);

            DatenFeiertage = dtFeiertage.Rows.OfType<DataRow>().Select(dr => dr.Field<DateTime>("Datum")).ToList();
            DatenArbeitsfreieTage = dtArbeitsfreieTage.Rows.OfType<DataRow>().Select(dr => dr.Field<DateTime>("Datum")).ToList();

        }

        public void Aktualisieren()
        {

            DateTime tempStartdatum = DateTime.Today;
            DateTime tempEnddatum = DateTime.Today.AddYears(2);

            DataTable dtFeiertage = Daten.GibFeiertage(tempStartdatum, tempEnddatum);
            DataTable dtArbeitsfreieTage = Daten.GibArbeitsfreieTage(tempStartdatum, tempEnddatum);

            DatenFeiertage = dtFeiertage.Rows.OfType<DataRow>().Select(dr => dr.Field<DateTime>("Datum")).ToList();
            DatenArbeitsfreieTage = dtArbeitsfreieTage.Rows.OfType<DataRow>().Select(dr => dr.Field<DateTime>("Datum")).ToList();

        }




        private void MetroWindow_Closing(object sender, CancelEventArgs e)
        {
            Shown = false;
        }

    }
    public class CalendarDayStyleSelector : StyleSelector
    {
        private Betriebskalender _page;

        internal CalendarDayStyleSelector(Betriebskalender page)
        {
            this._page = page;
        }

        public override System.Windows.Style SelectStyle(object item, DependencyObject container)
        {
            CalendarDay day = (CalendarDay)container;
            DateTime date = day.StartDate;

            if (date.Month == 12 && date.Day == 25)
                return (System.Windows.Style)this._page.Resources["Feiertag"];


            return null;
        }
    }
}