c# - WP8: Cambiar la plantilla de datos Listboxitem en la selección modificada

xaml windows-phone-8

Question

Tengo un listbox en Windows Phone 8,

Para eso quiero cambiar la plantilla de datos para el elemento seleccionado.

He hecho esto es WPF como:

<Window.Resources>
<DataTemplate x:Key="ItemTemplate">
<TextBlock Text="{Binding}" Foreground="Red" />
</DataTemplate>
<DataTemplate x:Key="SelectedTemplate">
<TextBlock Text="{Binding}" Foreground="Green" />
</DataTemplate>
<Style TargetType="{x:Type ListBoxItem}" x:Key="ContainerStyle">
<Setter Property="ContentTemplate" Value="{StaticResource ItemTemplate}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="ContentTemplate" Value="{StaticResource SelectedTemplate}" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<ListBox x:Name="lstItems" ItemContainerStyle="{StaticResource ContainerStyle}" />

Pero no sé cómo lograr esto en Windows Phone 8 porque no

apoyar Trigggers

Answer 1

Intentaba tener éxito.

Podemos usar VisualStateManager para esto

<Page.Resources>
<DataTemplate x:Key="ItemTemplate">
<TextBlock Text="{Binding}" Foreground="Blue" FontSize="20"/>
</DataTemplate>
<DataTemplate x:Key="SelectedTemplate">
<TextBlock Text="{Binding}" Foreground="Red" FontSize="20"/>
</DataTemplate>
<Style TargetType="ListBoxItem" x:Key="custom">
<Setter Property="Background" Value="Transparent" />
<Setter Property="TabNavigation" Value="Local" />
<Setter Property="Padding" Value="8,10" />
<Setter Property="HorizontalContentAlignment" Value="Left" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Border x:Name="LayoutRoot"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemPointerOverForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="PressedBackground"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" >
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ItemTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="InnerGrid"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SelectedTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedUnfocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="InnerGrid"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SelectedTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedDisabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="InnerGrid"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SelectedTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="InnerGrid"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SelectedTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="InnerGrid"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListBoxItemSelectedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="ContentTemplate">
<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SelectedTemplate}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="FocusVisualWhite"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
<DoubleAnimation Storyboard.TargetName="FocusVisualBlack"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid x:Name="InnerGrid"
Background="Transparent" >
<Rectangle x:Name="PressedBackground"
Fill="{ThemeResource ListBoxItemPressedBackgroundThemeBrush}"
Opacity="0" />
<ContentPresenter x:Name="ContentPresenter"
Content="{TemplateBinding Content}"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}" />
<Rectangle x:Name="FocusVisualWhite"
Stroke="{ThemeResource FocusVisualWhiteStrokeThemeBrush}"
StrokeEndLineCap="Square"
StrokeDashArray="1,1"
Opacity="0"
StrokeDashOffset=".5" />
<Rectangle x:Name="FocusVisualBlack"
Stroke="{ThemeResource FocusVisualBlackStrokeThemeBrush}"
StrokeEndLineCap="Square"
StrokeDashArray="1,1"
Opacity="0"
StrokeDashOffset="1.5" />
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Grid>
<ListBox x:Name="lstItems"
ItemContainerStyle="{StaticResource custom}"/>
</Grid>

Lo siento, es un poco largo, pero pensé que podría ayudar a alguien. :)

Answer 2

en C # puedes usarlo fácilmente

ListBox.ItemTemplate = (DataTemplate) this.Resources ["yourkeytemplate"];

no te olvides de declarar tu plantilla en el recurso XAML