change winrt datepicker selected item background color - windows-8

Question

I want to change selected item background in winrt DatePicker
<ResourceDictionary x:Key="Default">
<SolidColorBrush x:Key="ComboBoxItemSelectedBackgroundThemeBrush" Color="#FF367DB2" />
<SolidColorBrush x:Key="ComboBoxItemSelectedPointerOverBackgroundThemeBrush" Color="#FF367DB2" />
</ResourceDictionary>
Added this code in StandardStyles.xaml change it but in all pages in the application but i want to change it only in this page.

Answer 1

First of all you need to create custom style for ComboBox, below given is default style. Change the SolidColorBrush resources in the style according to your requirement. Then apply customized ComboBox style to DatePicker style.
<Style TargetType="ComboBox" x:Key="MyComboBox">
<Setter Property="Padding" Value="8,0" />
<Setter Property="Foreground" Value="{StaticResource ComboBoxForegroundThemeBrush}" />
<Setter Property="Background" Value="{StaticResource ComboBoxBackgroundThemeBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource ComboBoxBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{StaticResource ComboBoxBorderThemeThickness}" />
<Setter Property="TabNavigation" Value="Once" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Disabled" />
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.IsVerticalRailEnabled" Value="True" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="ScrollViewer.BringIntoViewOnFocusChange" Value="True" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="FontFamily" Value="{StaticResource ContentControlThemeFontFamily}" />
<Setter Property="FontSize" Value="{StaticResource ControlContentThemeFontSize}" />
<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<CarouselPanel />
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPointerOverBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Highlight" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxSelectedPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPressedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPressedBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Opacity" To="1" Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxArrowPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxArrowDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="HighlightBackground" Storyboard.TargetProperty="Opacity" To="1" Duration="0" />
<DoubleAnimation Storyboard.TargetName="Highlight" Storyboard.TargetProperty="Opacity" To="1" Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxFocusedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="FocusedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Highlight" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ComboBoxPressedHighlightThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="FocusedDropDown">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PopupBorder" Storyboard.TargetProperty="Visibility" Duration="0">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DropDownStates">
<VisualState x:Name="Opened">
<Storyboard>
<SplitOpenThemeAnimation OpenedTargetName="PopupBorder" ContentTargetName="ScrollViewer" ClosedTargetName="ContentPresenter" ContentTranslationOffset="0" OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}" OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}" ClosedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownClosedHeight}" />
</Storyboard>
</VisualState>
<VisualState x:Name="Closed">
<Storyboard>
<SplitCloseThemeAnimation OpenedTargetName="PopupBorder" ContentTargetName="ScrollViewer" ClosedTargetName="ContentPresenter" ContentTranslationOffset="40" OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}" ContentTranslationDirection="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.SelectedItemDirection}" OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}" ClosedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownClosedHeight}" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Background" Grid.ColumnSpan="2" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" />
<Rectangle x:Name="PressedBackground" Fill="{StaticResource ComboBoxPressedHighlightThemeBrush}" Margin="{TemplateBinding BorderThickness}" Opacity="0" />
<Border x:Name="HighlightBackground" Grid.ColumnSpan="2" Background="{StaticResource ComboBoxFocusedBackgroundThemeBrush}" BorderBrush="{StaticResource ComboBoxFocusedBorderThemeBrush}" BorderThickness="{TemplateBinding BorderThickness}" Opacity="0" />
<Rectangle x:Name="Highlight" Fill="{StaticResource ComboBoxSelectedBackgroundThemeBrush}" Margin="{TemplateBinding BorderThickness}" Opacity="0" />
<ContentPresenter x:Name="ContentPresenter" Margin="{TemplateBinding Padding}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
<TextBlock x:Name="DropDownGlyph" Text="" Grid.Column="1" IsHitTestVisible="False" Margin="0,0,6,4" Foreground="{StaticResource ComboBoxArrowForegroundThemeBrush}" FontWeight="Bold" FontSize="{StaticResource ComboBoxArrowThemeFontSize}" FontFamily="{StaticResource SymbolThemeFontFamily}" HorizontalAlignment="Right" VerticalAlignment="Center" />
<Popup x:Name="Popup">
<Border x:Name="PopupBorder" Background="{StaticResource ComboBoxPopupBackgroundThemeBrush}" BorderBrush="{StaticResource ComboBoxPopupBorderThemeBrush}" BorderThickness="{StaticResource ComboBoxPopupBorderThemeThickness}" HorizontalAlignment="Stretch">
<ScrollViewer x:Name="ScrollViewer" Foreground="{StaticResource ComboBoxPopupForegroundThemeBrush}" VerticalSnapPointsType="OptionalSingle" VerticalSnapPointsAlignment="Near" HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}" HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}" IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}" IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}" IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}" BringIntoViewOnFocusChange="{TemplateBinding ScrollViewer.BringIntoViewOnFocusChange}" ZoomMode="Disabled">
<ItemsPresenter />
</ScrollViewer>
</Border>
</Popup>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
xmlns:dt="using:WinRTDatePicker"
<Style TargetType="dt:DatePicker" x:Key="MyDatePicker">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="dt:DatePicker">
<Grid Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition Width="0.7*" />
</Grid.ColumnDefinitions>
<ComboBox x:Name="_DayOptions"
Style="{StaticResource MyComboBox}"
Margin="0,0,5,0" />
<ComboBox x:Name="_MonthOptions"
Style="{StaticResource MyComboBox}"
Grid.Column="1"
Margin="0,0,5,0" />
<ComboBox x:Name="_YearOptions"
Style="{StaticResource MyComboBox}"
Grid.Column="2" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<dt:DatePicker Style="{StaticResource MyDatePicker}" />