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  `ItemsControl`を使った例

 

  <Window

  x:Class="Questions259221.MainWindow"

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

  xmlns:sys="clr-namespace:System;assembly=mscorlib"

  SizeToContent="WidthAndHeight">

  <StackPanel>

  <StackPanel Orientation="Horizontal">

  <ComboBox

  x:Name="ChangeYEAR"

  Width="100"

  SelectionChanged="SelectionChanged" />

  <ComboBox

  x:Name="ChangeMONTH"

  Width="100"

  SelectionChanged="SelectionChanged" />

  <Button

  x:Name="Today"

  Click="Today_Click"

  Content="Today" />

  </StackPanel>

 

  <StackPanel Orientation="Horizontal">

 

  <!-- 選択したい場合 -->

  <ListBox

  x:Name="calendarSelector"

  Width="300"

  AlternationCount="7">

  <ItemsControl.Template>

  <ControlTemplate TargetType="ItemsControl">

  <ControlTemplate.Resources>

  <Style TargetType="{x:Type TextBlock}">

  <Setter Property="VerticalAlignment" Value="Center" />

  <Setter Property="HorizontalAlignment" Value="Center" />

  </Style>

  </ControlTemplate.Resources>

  <Border

  Background="Azure"

  BorderBrush="Black"

  BorderThickness="1">

  <StackPanel>

  <UniformGrid Margin="10,10,10,0" Columns="7">

  <TextBlock Foreground="Red" Text="Sun" />

  <TextBlock Text="Mon" />

  <TextBlock Text="Tue" />

  <TextBlock Text="Wed" />

  <TextBlock Text="Thu" />

  <TextBlock Text="Fri" />

  <TextBlock Foreground="Blue" Text="Sat" />

  </UniformGrid>

  <ItemsPresenter Margin="10" />

  </StackPanel>

  </Border>

  </ControlTemplate>

  </ItemsControl.Template>

  <ItemsControl.ItemsPanel>

  <ItemsPanelTemplate>

  <UniformGrid Columns="7" />

  </ItemsPanelTemplate>

  </ItemsControl.ItemsPanel>

  <ItemsControl.ItemTemplate>

  <DataTemplate>

  <Label

  HorizontalContentAlignment="Center"

  VerticalContentAlignment="Center"

  Content="{Binding Day}"

  Foreground="{Binding Foreground, RelativeSource={RelativeSource AncestorType=ListBoxItem}}" />

  </DataTemplate>

  </ItemsControl.ItemTemplate>

  <ItemsControl.ItemContainerStyle>

  <Style TargetType="ListBoxItem">

  <Setter Property="HorizontalContentAlignment" Value="Stretch" />

  <Setter Property="VerticalContentAlignment" Value="Stretch" />

  <Style.Triggers>

  <Trigger Property="ItemsControl.AlternationIndex" Value="0">

  <Setter Property="Foreground" Value="Red" />

  <Trigger Property="ItemsControl.AlternationIndex" Value="6">

  <Setter Property="Foreground" Value="Blue" />

  <DataTrigger Binding="{Binding}" Value="{x:Static sys:DateTime.MinValue}">

  <Setter Property="Visibility" Value="Hidden" />

  </DataTrigger>

  </Style.Triggers>

  </Style>

  </ItemsControl.ItemContainerStyle>

  </ListBox>

 

  <!-- 表示だけの場合 -->

  <ItemsControl

  x:Name="calendarView"

  Width="300"

  AlternationCount="7">

  <ItemsControl.Template>

  <ControlTemplate TargetType="ItemsControl">

  <ControlTemplate.Resources>

  <Style TargetType="{x:Type TextBlock}">

  <Setter Property="VerticalAlignment" Value="Center" />

  <Setter Property="HorizontalAlignment" Value="Center" />

  </Style>

  </ControlTemplate.Resources>

  <Border

  Background="Azure"

  BorderBrush="Black"

  BorderThickness="1">

  <StackPanel>

  <UniformGrid Margin="10,10,10,0" Columns="7">

  <TextBlock Foreground="Red" Text="Sun" />

  <TextBlock Text="Mon" />

  <TextBlock Text="Tue" />

  <TextBlock Text="Wed" />

  <TextBlock Text="Thu" />

  <TextBlock Text="Fri" />

  <TextBlock Foreground="Blue" Text="Sat" />

  </UniformGrid>

  <ItemsPresenter Margin="10" />

  </StackPanel>

  </Border>

  </ControlTemplate>

  </ItemsControl.Template>

  <ItemsControl.ItemsPanel>

  <ItemsPanelTemplate>

  <UniformGrid Columns="7" />

  </ItemsPanelTemplate>

  </ItemsControl.ItemsPanel>

  <ItemsControl.ItemTemplate>

  <DataTemplate>

  <Label

  HorizontalContentAlignment="Center"

  VerticalContentAlignment="Center"

  Content="{Binding Day}"

  Foreground="{Binding Tag, RelativeSource={RelativeSource AncestorType=ContentPresenter}}" />

  </DataTemplate>

  </ItemsControl.ItemTemplate>

  <ItemsControl.ItemContainerStyle>

  <Style TargetType="ContentPresenter">

  <Setter Property="Tag" Value="Black" />

  <Style.Triggers>

  <Trigger Property="ItemsControl.AlternationIndex" Value="0">

  <Setter Property="Tag" Value="Red" />

  <Trigger Property="ItemsControl.AlternationIndex" Value="6">

  <Setter Property="Tag" Value="Blue" />

  <DataTrigger Binding="{Binding}" Value="{x:Static sys:DateTime.MinValue}">

  <Setter Property="Visibility" Value="Hidden" />

  </DataTrigger>

  </Style.Triggers>

  </Style>

  </ItemsControl.ItemContainerStyle>

  </ItemsControl>

 

  <!-- カレンダーを出したいだけなら -->

  <Viewbox Width="300">

  <Calendar x:Name="calendar" IsHitTestVisible="False" />

  </Viewbox>

  </StackPanel>

 

  <TextBlock Text="{Binding SelectedItem, ElementName=calendarSelector, StringFormat=yyyy年MM月dd日}" />

 

  </StackPanel>

  </Window>

  ```

 

  using System;

  using System.Linq;

  using System.Windows;

  using System.Windows.Controls;

 

  namespace Questions259221

  {

  public partial class MainWindow : Window

  {

  public MainWindow()

  {

  InitializeComponent();

 

  var now = DateTime.Now;

  ChangeYEAR.ItemsSource = Enumerable.Range(now.Year - 10, 21);

  ChangeYEAR.SelectedItem = now.Year;

 

  ChangeMONTH.ItemsSource = Enumerable.Range(1, 12);

  ChangeMONTH.SelectedItem = now.Month;

  }

 

  private void SelectionChanged(object sender, SelectionChangedEventArgs e)

  {

  if(ChangeYEAR.SelectedItem is int year && ChangeMONTH.SelectedItem is int month)

  {

  var firstDate = new DateTime(year, month, 1);

  var lastDay = firstDate.AddMonths(1).AddDays(-1).Day;

  var dayOfWeek = (int)firstDate.DayOfWeek;

 

  var spacer = Enumerable.Repeat(DateTime.MinValue, dayOfWeek);

  var days = Enumerable.Range(0, lastDay).Select(x => firstDate.AddDays(x));

  var items = spacer.Concat(days);

  calendarSelector.ItemsSource = items;

  calendarView.ItemsSource = items;

  calendar.DisplayDate = firstDate;

  }

  }

 

  private void Today_Click(object sender, RoutedEventArgs e)

  {

  var now = DateTime.Now;

  ChangeYEAR.SelectedItem = now.Year;

  ChangeMONTH.SelectedItem = now.Month;

  calendarSelector.SelectedItem = now.Date;

  calendar.DisplayDate = now.Date;

  }

  }

  }

  ```

  

 

  参考 [ItemsControl 攻略 ～ 外観のカスタマイズ | grabacr.nét](http://grabacr.net/archives/1240)