M-V-VMパターンでsmart.fmの辞書アプリを書きなおしてみた

<UserControl x:Class="SharpLab.IKnow.ItemBankPane.ItemBankPaneView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:SharpLab.IKnow.ItemBankPane"
	>
    <UserControl.Resources>
    	<ResourceDictionary>
			<local:ItemBankPaneViewModel x:Key="viewModel" />
		</ResourceDictionary>
	</UserControl.Resources>
	<UserControl.DataContext>
		<Binding Mode="OneTime" Source="{StaticResource viewModel}" />
	</UserControl.DataContext>
	<DockPanel>
		<ToolBar DockPanel.Dock="Top" Height="30" VerticalAlignment="Top">
			<TextBox local:TextBoxBehavior.Command="{Binding Mode=OneTime, Path=StartSearchCommand}"  HorizontalAlignment="Left" Text="{Binding Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, Path=Keyword}" VerticalAlignment="Top" Width="184" />
			<Button Command="{Binding Mode=OneTime, Path=StartSearchCommand}" Content="Search"></Button>
		</ToolBar>
		<ContentControl>
				<local:ResultPageView DataContext="{Binding Mode=OneTime, Path=ResultPage}" />
		</ContentControl>
	</DockPanel>
</UserControl>

<UserControl x:Class="SharpLab.IKnow.ItemBankPane.ResultPageView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
	xmlns:local="clr-namespace:SharpLab.IKnow.ItemBankPane"
	xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="300" d:DesignHeight="300"
    >
	<UserControl.Resources>
		<ResourceDictionary>
			<ResourceDictionary.MergedDictionaries>
				<ResourceDictionary Source="Resources/ResultPageResources.xaml"/>
				<ResourceDictionary Source="Resources/VocabularyViewerStyle.xaml"/>
			</ResourceDictionary.MergedDictionaries>
		</ResourceDictionary>
	</UserControl.Resources>
	<Grid DockPanel.Dock="Bottom">
		<Grid.RowDefinitions>
			<RowDefinition />
			<RowDefinition Height="35" />
		</Grid.RowDefinitions>
		<Grid.ColumnDefinitions>
			<ColumnDefinition />
			<ColumnDefinition Width="40" />
			<ColumnDefinition />
		</Grid.ColumnDefinitions>
		<ListBox Name="VocabularyViewer" Grid.Row="0" Grid.ColumnSpan="3" ItemsSource="{Binding Mode=OneWay, NotifyOnTargetUpdated=true, Path=Items}" Style="{StaticResource VocabularyViewerStyle}" />
		<Button Grid.Row="1"  Grid.Column="0" Margin="6,6,6,6" Command="{Binding Mode=OneTime, Path=NavigatePrevPageCommand}" Content="Prev"/>
		<Button Grid.Row="1" Grid.Column="2" Margin="6,6,6,6" Command="{Binding Mode=OneTime, Path=NavigateNextPageCommand}" Content="Next"/>
		<TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding Mode=OneWay, Path=PageCounter}" HorizontalAlignment="Center" VerticalAlignment="Center" />
	</Grid>
</UserControl>

<UserControl x:Class="SharpLab.IKnow.ItemBankPane.ItemView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:SharpLab.IKnow.ItemBankPane"
	>

	<UserControl.Resources>
		<ResourceDictionary>
			<ResourceDictionary.MergedDictionaries>
				<ResourceDictionary Source="Resources/PlusButton.xaml"/>
				<ResourceDictionary Source="Resources/PlayButton.xaml"/>
				<ResourceDictionary Source="Resources/SentenceListViewerStyle.xaml"/>
			</ResourceDictionary.MergedDictionaries>
		</ResourceDictionary>
	</UserControl.Resources>

	<DockPanel>
		<Expander x:Name="Sentences" DockPanel.Dock="Bottom" TabIndex="3" Visibility="{Binding Mode=OneTime, Path=SentencesVisility}" >
			<Expander.Header>
				<TextBlock Text="Example Sentences:" />
			</Expander.Header>
			<ItemsControl Name="SentenceListViewer" ItemsSource="{Binding Mode=OneTime, Path=Sentences}" Style="{StaticResource SentenceListViewerStyle}"  />
		</Expander>
		<!--DropDown="{DynamicResource VocabularyViewerItemContextMenu}"-->
		<local:DropDownButton DockPanel.Dock="Right" Width="24" Height="24" Style="{StaticResource PlusButtonStyle}"  TabIndex="1" Margin="0,0,8,0" />
		<DockPanel DockPanel.Dock="Top" LastChildFill="true">
			<MediaElement x:Name="mp3Player" LoadedBehavior="Manual" Source="{Binding Mode=OneTime, Path=CueSound}" Width="0"  Height="0"  />
			<Button DockPanel.Dock="Left" Width="18" Height="18" Margin="2,0,4,0" TabIndex="0" Style="{StaticResource PlayButtonStyle}" Command="{Binding Mode=OneTime, Path=PlaySoundCommand}" CommandParameter="{Binding ElementName=mp3Player}" />
			<ContentControl Content="{Binding Mode=OneTime, Path=CueText}" IsTabStop="False" />
		</DockPanel>
		<TextBlock DockPanel.Dock="Top" FontSize="12" Margin="20,0,0,0" Text="{Binding Mode=OneTime, Path=Meaning}" TextWrapping="Wrap" />
	</DockPanel>
</UserControl>

<UserControl x:Class="SharpLab.IKnow.ItemBankPane.SentenceView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	xmlns:local="clr-namespace:SharpLab.IKnow.ItemBankPane"
	>
	<UserControl.Resources>
		<local:StringToTextBlockConverter x:Key="StringToTextBlockConverter" />
	</UserControl.Resources>

	<UserControl.Content>
		<Binding Path="Text" Mode="OneTime"  Converter="{StaticResource StringToTextBlockConverter}" />
	</UserControl.Content>
</UserControl>