UWP VisualState - Modifying entire class (Button for example) - c#

in UWP, we can easily change the properties of a button for example based on the window size, using the visualstate.setters
<VisualState x:Name="VisualStateNarrow" >
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowHeight="{StaticResource NarrowMinHeight}" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="btnTest.Height" Value="100"/>
<Setter Target="btnTest.Width" Value="100"/>
....
</VisualState.Setters>
</VisualState>
....
Now let's say I have a large number of buttons. Instead of manually typing each entry, btnA.Height.., BtnB.Height... and so on, is there a way maybe to enter them within the custom.xaml?
I was trying something like:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="using:Template10.Controls">
<x:Double x:Key="CustomHeightN">100</x:Double>
<x:Double x:Key="CustomWidthN">100</x:Double>
<ResourceDictionary.ThemeDictionaries
<ResourceDictionary x:Key="VisualStateNarrow" >
<Style TargetType="Button">
<Setter Property="Height" Value="{ThemeResource CustomHeightN}" />
<Setter Property="Width" Value="{ThemeResource CustomWidthN}" />
</Style>
</ResourceDictionary>
....
But of course, it does not work. Could anyone suggest something by a chance?


The easiest way is to override the button template and add your state to its VisualStateManager.
Here, I've created a new AdaptiveGroup in the existing state manager which will change the Width and Height of the button root grid (some part of the style have been removed for clarity)
<Style TargetType="Button">      
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid x:Name="buttonRoot">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates" />
<VisualStateGroup x:Name="FocusStates" />
<VisualStateGroup x:Name="AdaptiveGroups">
<VisualState x:Name="narrow" />
<VisualState x:Name="wide">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="800" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="buttonRoot.Width" Value="200" />
<Setter Target="buttonRoot.Height" Value="200" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
The full code:
<Page
x:Class="ButtonVisualStateManager.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:ButtonVisualStateManager"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<Style TargetType="Button">
<Setter Property="Background" Value="{ThemeResource ButtonBackgroundThemeBrush}" />
<Setter Property="Foreground" Value="{ThemeResource ButtonForegroundThemeBrush}"/>
<Setter Property="BorderBrush" Value="{ThemeResource ButtonBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource ButtonBorderThemeThickness}" />
<Setter Property="Padding" Value="12,4,12,4" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontWeight" Value="SemiBold" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid x:Name="buttonRoot">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPointerOverForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPressedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledForegroundThemeBrush}" />
</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>
<VisualStateGroup x:Name="AdaptiveGroups">
<VisualState x:Name="narrow" />
<VisualState x:Name="wide">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="800" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="buttonRoot.Width" Value="200" />
<Setter Target="buttonRoot.Height" Value="200" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Border"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Margin="3">
<ContentPresenter x:Name="ContentPresenter"
Content="{TemplateBinding Content}"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
AutomationProperties.AccessibilityView="Raw"/>
</Border>
<Rectangle x:Name="FocusVisualWhite"
IsHitTestVisible="False"
Stroke="{ThemeResource FocusVisualWhiteStrokeThemeBrush}"
StrokeEndLineCap="Square"
StrokeDashArray="1,1"
Opacity="0"
StrokeDashOffset="1.5" />
<Rectangle x:Name="FocusVisualBlack"
IsHitTestVisible="False"
Stroke="{ThemeResource FocusVisualBlackStrokeThemeBrush}"
StrokeEndLineCap="Square"
StrokeDashArray="1,1"
Opacity="0"
StrokeDashOffset="0.5" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Button Content="button 1" />
<Button Content="button 2" />
<Button Content="button 3" />
<Button Content="button 4" />
</StackPanel>
</Page>

Related

How To increase the calendar icon size of CalendarDatePicker and customising it with different text or image icon [UWP]?

I tried changing the calendar icon size but couldn't find a property to achieve this.

How To increase the calendar icon size of CalendarDatePicker and customising it with different text or image icon [UWP]?
You could edit the default CalendarDatePicker style and change CalendarGlyph FontIcon's FontSize and Glyph property like the following.
<Style TargetType="CalendarDatePicker">
<Setter Property="Foreground" Value="{ThemeResource CalendarDatePickerForeground}" />
<Setter Property="Background" Value="{ThemeResource CalendarDatePickerBackground}" />
<Setter Property="BorderBrush" Value="{ThemeResource CalendarDatePickerBorderBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource CalendarDatePickerBorderThemeThickness}" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="UseSystemFocusVisuals" Value="{ThemeResource IsApplicationFocusVisualKindReveal}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CalendarDatePicker">
<Grid x:Name="Root">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBorderBrushPointerOver}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBackgroundPointerOver}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBackgroundPressed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBorderBrushPressed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBackgroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBorderBrushDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerHeaderForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DateText" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerTextForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CalendarGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerCalendarGlyphForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerBackgroundFocused}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DateText" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource CalendarDatePickerTextForegroundSelected}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="HeaderStates">
<VisualState x:Name="TopHeader" />
<VisualState x:Name="LeftHeader">
<VisualState.Setters>
<Setter Target="HeaderContentPresenter.(Grid.Row)" Value="1" />
<Setter Target="HeaderContentPresenter.(Grid.Column)" Value="0" />
<Setter Target="HeaderContentPresenter.(Grid.ColumnSpan)" Value="1" />
<Setter Target="HeaderContentPresenter.Margin" Value="{StaticResource CalendarDatePickerLeftHeaderMargin}" />
<Setter Target="HeaderContentPresenter.MaxWidth" Value="{StaticResource CalendarDatePickerLeftHeaderMaxWidth}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<FlyoutBase.AttachedFlyout>
<Flyout Placement="Bottom" ShouldConstrainToRootBounds="False">
<Flyout.FlyoutPresenterStyle>
<Style TargetType="FlyoutPresenter">
<Setter Property="Padding" Value="0" />
<Setter Property="BorderThickness" Value="0" />
<Setter Property="IsDefaultShadowEnabled" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="FlyoutPresenter">
<ContentPresenter Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentTransitions="{TemplateBinding ContentTransitions}"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Flyout.FlyoutPresenterStyle>
<CalendarView x:Name="CalendarView"
Style="{TemplateBinding CalendarViewStyle}"
MinDate="{TemplateBinding MinDate}"
MaxDate="{TemplateBinding MaxDate}"
IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
DisplayMode="{TemplateBinding DisplayMode}"
FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
DayOfWeekFormat="{TemplateBinding DayOfWeekFormat}"
CalendarIdentifier="{TemplateBinding CalendarIdentifier}"
IsOutOfScopeEnabled="{TemplateBinding IsOutOfScopeEnabled}"
IsGroupLabelVisible="{TemplateBinding IsGroupLabelVisible}" />
</Flyout>
</FlyoutBase.AttachedFlyout>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<ContentPresenter x:Name="HeaderContentPresenter"
x:DeferLoadStrategy="Lazy"
Grid.Row="0"
Grid.Column="1"
Grid.ColumnSpan="2"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
Margin="{StaticResource CalendarDatePickerTopHeaderMargin}"
TextWrapping="Wrap"
VerticalAlignment="Top"
Visibility="Collapsed" />
<Border x:Name="Background"
Grid.Row="1"
Grid.Column="1"
Grid.ColumnSpan="2"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}"
CornerRadius="{TemplateBinding CornerRadius}"
Control.IsTemplateFocusTarget="True"
MinHeight="32"/>
<TextBlock x:Name="DateText"
Grid.Row="1"
Grid.Column="1"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForeground}"
Text="{TemplateBinding PlaceholderText}"
Padding="12, 0, 0, 2"
VerticalAlignment="Center" />
<!--Edit the following FontIcon's property-->
<FontIcon x:Name="CalendarGlyph"
Grid.Row="1"
Grid.Column="2"
Glyph=""
FontFamily="{ThemeResource SymbolThemeFontFamily}"
Foreground="{ThemeResource CalendarDatePickerCalendarGlyphForeground}"
FontSize="18"
HorizontalAlignment="Center"
VerticalAlignment="Center" />
<ContentPresenter x:Name="DescriptionPresenter"
Grid.Row="2"
Grid.Column="1"
Grid.ColumnSpan="2"
Content="{TemplateBinding Description}"
x:Load="False"
Foreground="{ThemeResource SystemControlDescriptionTextForegroundBrush}"
AutomationProperties.AccessibilityView="Raw" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

UWP User Control Unable to instatiate MyUserControl

My Uwp app builds and runs correctly. The User Control is visible in the user control designer. When I initially add the control to my main page the control is visible in the designer. I run the app and come back to main Page designed and the User Control has vanished and the xaml says "Unable ti instaiate an object of type user Control. I don;t understand why the control is visible in the user control designer but not the main page designer AND the app runs fine.
Has anybody else come across this problem? is there a clue to where I might find issues in the user control?
The XAML for the user control:
<UserControl
x:Class="UI_Test_1.Controls.BookingTimeControl"
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="using:UI_Test_1.Views"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:telerik="using:Telerik.UI.Xaml.Controls.Input"
xmlns:uControls="using:UI_Test_1.Controls"
d:DesignHeight="400"
d:DesignWidth="500"
mc:Ignorable="d">
<UserControl.Resources>
<Style x:Key="ListBoxItemContainerStyle1" TargetType="ListBoxItem">
<Setter Property="Background" Value="Transparent" />
<Setter Property="TabNavigation" Value="Local" />
<Setter Property="Padding" Value="5,5,5,5" />
<Setter Property="HorizontalContentAlignment" Value="Left" />
<Setter Property="UseSystemFocusVisuals" Value="{StaticResource UseSystemFocusVisuals}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Grid
x:Name="LayoutRoot"
Background="{TemplateBinding Background}"
BorderThickness="{TemplateBinding BorderThickness}">
<Grid.Resources>
<Style x:Key="BaseContentPresenterStyle" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="XamlAutoFontFamily" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FontSize" Value="10" />
<Setter Property="TextWrapping" Value="Wrap" />
<Setter Property="LineStackingStrategy" Value="MaxHeight" />
<Setter Property="TextLineBounds" Value="Full" />
<Setter Property="OpticalMarginAlignment" Value="TrimSideBearings" />
</Style>
<Style
x:Key="BodyContentPresenterStyle"
BasedOn="{StaticResource BaseContentPresenterStyle}"
TargetType="ContentPresenter">
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="FontSize" Value="12" />
</Style>
</Grid.Resources>
<Rectangle
x:Name="PressedBackground"
Control.IsTemplateFocusTarget="True"
Fill="Transparent" />
<ContentPresenter
x:Name="ContentPresenter"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentTransitions="{TemplateBinding ContentTransitions}"
Style="{StaticResource BodyContentPresenterStyle}"
TextWrapping="NoWrap" />
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="yellow" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="Black" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedUnfocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="White" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PressedBackground" Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="Transparent" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<uControls:StringFormatConverter x:Key="dateFormatter" />
</UserControl.Resources>
<Grid>
<Grid
Margin="10,10,10,10"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Background="Black">
<StackPanel
Grid.Row="0"
Grid.RowSpan="2"
Width="445"
Height="350"
Margin="5,5,5,5"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Background="Blue"
Orientation="Horizontal">
<ListBox
Name="timeSelectionList"
Width="135"
Height="350"
HorizontalAlignment="Center"
VerticalAlignment="Top"
BorderBrush="Black"
BorderThickness="2"
GotFocus="Control_GotFocus"
ItemContainerStyle="{StaticResource ListBoxItemContainerStyle1}"
ItemsSource="{x:Bind timeSelectors}"
LostFocus="Control_LostFocus"
PreviewKeyDown="timeSelectionList_PreviewKeyDown"
SelectionChanged="TimeSelectionList_SelectionChanged" />
<StackPanel VerticalAlignment="Top" Orientation="Vertical">
<DatePicker
x:Name="cal"
Background="White"
Date="{x:Bind viewModel.bookingTime, Mode=TwoWay}"
DateChanged="cal_DateChanged"
DayFormat="{}{day.integer} {dayofweek.abbreviated}"
FontSize="20"
GotFocus="Control_GotFocus"
LostFocus="Control_LostFocus"
Opacity="100"
PreviewKeyDown="cal_PreviewKeyDown" />
<TimePicker
x:Name="timePicker"
Margin="5"
HorizontalAlignment="Center"
Background="White"
FontSize="20"
GotFocus="Control_GotFocus"
LostFocus="Control_LostFocus"
MinuteIncrement="5"
TimeChanged="timePicker_TimeChanged" />
<TextBox
Name="bookingTimeBox"
Width="250"
Height="auto"
Margin="5,0,5,5"
Background="Black"
FontSize="12"
FontWeight="Bold"
Foreground="Yellow"
Text="{x:Bind viewModel.bookingTime, Mode=OneWay, Converter={StaticResource dateFormatter}}"
TextAlignment="Center" />
</StackPanel>
</StackPanel>
</Grid>
</Grid>

Pivot Header style

C# UWP Windows 10 project
I need to set Pivot header style to something like this
I has tried to use this example from stackoverflow, but not sucessful.
Can you say how I can set rectangle (like on image) behind header text and change background color for selected unselected items?

As the answer you've mentioned, we can use PivotHeaderItem styles and templates to implement this.
Firstly, we can copy the style from MSDN and put in into Page.Resources.
Then add a Border in the Grid and set its properties like following:
<Grid x:Name="Grid" Background="{TemplateBinding Background}">
...
<Border x:Name="Border"
BorderBrush="Gray"
BorderThickness="2"
CornerRadius="20">
<ContentPresenter x:Name="ContentPresenter"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
FontFamily="{TemplateBinding FontFamily}"
FontSize="{TemplateBinding FontSize}"
FontWeight="{TemplateBinding FontWeight}">
<ContentPresenter.RenderTransform>
<TranslateTransform x:Name="ContentPresenterTranslateTransform" />
</ContentPresenter.RenderTransform>
</ContentPresenter>
</Border>
</Grid>
This will add a border with corners like your image.
After this, we can edit the "Selected" VisualState so that when we selected the header, it can change the background and foreground:
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="White" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
Following is the complete XAML I used for example:
<Page x:Class="PivotUWP.MainPage"
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="using:PivotUWP"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<Style TargetType="PivotHeaderItem">
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}" />
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}" />
<Setter Property="CharacterSpacing" Value="{ThemeResource PivotHeaderItemCharacterSpacing}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseMediumBrush}" />
<Setter Property="Padding" Value="{ThemeResource PivotHeaderItemMargin}" />
<Setter Property="Height" Value="48" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="PivotHeaderItem">
<Grid x:Name="Grid" Margin="10,0" Background="{TemplateBinding Background}">
<Grid.Resources>
<Style x:Key="BaseContentPresenterStyle" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="XamlAutoFontFamily" />
<Setter Property="FontWeight" Value="SemiBold" />
<Setter Property="FontSize" Value="15" />
<Setter Property="TextWrapping" Value="Wrap" />
<Setter Property="LineStackingStrategy" Value="MaxHeight" />
<Setter Property="TextLineBounds" Value="Full" />
<Setter Property="OpticalMarginAlignment" Value="TrimSideBearings" />
</Style>
<Style x:Key="BodyContentPresenterStyle" BasedOn="{StaticResource BaseContentPresenterStyle}" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}" />
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}" />
</Style>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition From="Unselected" GeneratedDuration="0:0:0.33" To="UnselectedLocked" />
<VisualTransition From="UnselectedLocked" GeneratedDuration="0:0:0.33" To="Unselected" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unselected" />
<VisualState x:Name="UnselectedLocked">
<Storyboard>
<DoubleAnimation Duration="0"
Storyboard.TargetName="ContentPresenterTranslateTransform"
Storyboard.TargetProperty="X"
To="{ThemeResource PivotHeaderItemLockedTranslation}" />
<DoubleAnimation Duration="0"
Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="(UIElement.Opacity)"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="White" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="Border"
BorderBrush="Gray"
BorderThickness="2"
CornerRadius="20">
<ContentPresenter x:Name="ContentPresenter"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
FontFamily="{TemplateBinding FontFamily}"
FontSize="{TemplateBinding FontSize}"
FontWeight="{TemplateBinding FontWeight}">
<ContentPresenter.RenderTransform>
<TranslateTransform x:Name="ContentPresenterTranslateTransform" />
</ContentPresenter.RenderTransform>
</ContentPresenter>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Pivot x:Name="rootPivot" Title="PIVOT TITLE">
<PivotItem Header="Pivot Item 1">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 1." />
</PivotItem>
<PivotItem Header="Pivot Item 2">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 2." />
</PivotItem>
<PivotItem Header="Pivot Item 3">
<!-- Pivot content goes here -->
<TextBlock Text="Content of pivot item 3." />
</PivotItem>
</Pivot>
</Grid>
</Page>
And it looks like:

Override ThemeResource for specific controls

I want to create a transparent TextBox, with no background color when focused (default is white, or SystemControlBackgroundChromeWhiteBrush).
I understand that I can override the used color in the App.xaml like so:
<Application.Resources>
<SolidColorBrush x:Key="SystemControlBackgroundChromeWhiteBrush">Transparent</SolidColorBrush>
</Application.Resources>
(or by using multiple ThemeDictionaries)
However I don't want to modify ALL TextBlocks but only specific ones. My first guess was to include the changed brush in the TextBlock's Resources, but this doesn't work.

You can modify default styles of control. HERE is the article how to find it.
Get style of TextBox, insert it as a resource in XAML and modify, eg.:
<!-- Default style for Windows.UI.Xaml.Controls.TextBox -->
<Style TargetType="TextBox">
<Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
<Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
<Setter Property="Foreground" Value="{ThemeResource TextBoxForegroundThemeBrush}" />
<Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
<Setter Property="Background" Value="{ThemeResource TextBoxBackgroundThemeBrush}" />
<Setter Property="BorderBrush" Value="{ThemeResource TextBoxBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource TextControlBorderThemeThickness}" />
<Setter Property="FontFamily" Value="{ThemeResource PhoneFontFamilyNormal}" />
<Setter Property="FontSize" Value="{ThemeResource ContentControlFontSize}" />
<Setter Property="TextWrapping" Value="NoWrap" />
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}" />
<Setter Property="Margin" Value="{ThemeResource TextControlMarginThemeThickness}" />
<Setter Property="VerticalAlignment" Value="Top" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentElement" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledHeaderForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="Opacity" Duration="0"
To="{ThemeResource TextControlBorderThemeOpacity}" />
</Storyboard>
</VisualState>
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="PlaceholderTextContentPresenter" Storyboard.TargetProperty="Opacity" Duration="0" To="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxFocusedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Border x:Name="BorderElement" Grid.Row="1" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" />
<ContentPresenter x:Name="HeaderContentPresenter" Grid.Row="0" Style="{StaticResource HeaderContentPresenterStyle}" Margin="{ThemeResource TextControlHeaderMarginThemeThickness}"
Content="{TemplateBinding Header}" ContentTemplate="{TemplateBinding HeaderTemplate}" />
<ScrollViewer x:Name="ContentElement" Grid.Row="1" MinHeight="{ThemeResource TextControlThemeMinHeight}"
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}" Margin="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}" IsTabStop="False" ZoomMode="Disabled"
AutomationProperties.AccessibilityView="Raw"/>
<ContentControl x:Name="PlaceholderTextContentPresenter" Grid.Row="1" Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}"
FontSize="{ThemeResource ContentControlFontSize}" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
IsTabStop="False" Content="{TemplateBinding PlaceholderText}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
Next, add name to modified style:
<Style x:Name="CustomTextBlock" TargetType="TextBox">
And apply it to your control, eg:
<TextBlock Style="{StaticResource CustomTextBlock}"/>
Here is the sample style for Transparent TextBox (WinRT/Universal Apps):
<Style x:Key="TransparentTextBox"
TargetType="TextBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush"
Storyboard.TargetName="BorderElement">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground"
Storyboard.TargetName="ContentElement">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground"
Storyboard.TargetName="PlaceholderTextContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground"
Storyboard.TargetName="HeaderContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledHeaderForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Duration="0"
To="{ThemeResource TextControlBorderThemeOpacity}"
Storyboard.TargetProperty="Opacity"
Storyboard.TargetName="BorderElement" />
</Storyboard>
</VisualState>
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush"
Storyboard.TargetName="BorderElement">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Duration="0"
To="0"
Storyboard.TargetProperty="Opacity"
Storyboard.TargetName="PlaceholderTextContentPresenter" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border x:Name="BorderElement"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Grid.Row="1" />
<ContentPresenter x:Name="HeaderContentPresenter"
ContentTemplate="{TemplateBinding HeaderTemplate}"
Content="{TemplateBinding Header}"
Margin="{ThemeResource TextControlHeaderMarginThemeThickness}"
Grid.Row="0"
Style="{StaticResource HeaderContentPresenterStyle}" />
<ScrollViewer x:Name="ContentElement"
AutomationProperties.AccessibilityView="Raw"
HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
IsTabStop="False"
IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}"
IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}"
IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
Margin="{TemplateBinding BorderThickness}"
MinHeight="{ThemeResource TextControlThemeMinHeight}"
Padding="{TemplateBinding Padding}"
Grid.Row="1"
VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
ZoomMode="Disabled" />
<ContentControl x:Name="PlaceholderTextContentPresenter"
Content="{TemplateBinding PlaceholderText}"
Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}"
FontSize="{ThemeResource ContentControlFontSize}"
IsTabStop="False"
Margin="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}"
Grid.Row="1" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Furthermore, you can use Blend (tool installed with Visual Studio), to modify controls easier. HERE is the sample tutorial from Microsoft Virtual Academy how to use it with VS2013.

You can use styles much like CSS and apply them only to specific controls:
<Style x:Key="TransparentTextBox" TargetType="{x:Type TextBox}">
<Setter Property="Background" Value="Transparent" />
</Style>
And then on the control reference the style you want to use:
<TextBox Style="{StaticResource TransparentTextBox}" />
Hope this helps.

How to change Vertical Alignment of Text in TextBox Windows Phone 8.1

How to set VerticalAlignment of Text which entered in TextBox. TextBox only have TextAlignment property which use to set Text alignment horizontally only.
XAML:
<TextBox MinWidth="300" MinHeight="45" TextAlignment="Left" VerticalAlignment="Center"/>
EDIT
After adding VerticalContentAlignment property XAML looks like:
<TextBox VerticalContentAlignment="Center" />
<TextBox VerticalContentAlignment="Bottom"/>
<PasswordBox VerticalContentAlignment="Stretch"/>
Output:
Clearly property VerticalContentAlignment not working. Anything I am missing here?

I have the answer for your prayers.. :-) What you do is simply to change the default style for the TextBox... Since you remove the scrollviewer, i guess its not possible to use more lines.. I did not need that functionality though... :)
Original TextBox Style:
<!-- Default style for Windows.UI.Xaml.Controls.TextBox -->
<Style TargetType="TextBox">
<Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
<Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
<Setter Property="Foreground" Value="{ThemeResource TextBoxForegroundThemeBrush}" />
<Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
<Setter Property="Background" Value="{ThemeResource TextBoxBackgroundThemeBrush}" />
<Setter Property="BorderBrush" Value="{ThemeResource TextBoxBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource TextControlBorderThemeThickness}" />
<Setter Property="FontFamily" Value="{ThemeResource PhoneFontFamilyNormal}" />
<Setter Property="FontSize" Value="{ThemeResource ContentControlFontSize}" />
<Setter Property="TextWrapping" Value="NoWrap" />
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}" />
<Setter Property="Margin" Value="{ThemeResource TextControlMarginThemeThickness}" />
<Setter Property="VerticalAlignment" Value="Top" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentElement"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames
Storyboard.TargetName="PlaceholderTextContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledHeaderForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Opacity" Duration="0"
To="{ThemeResource TextControlBorderThemeOpacity}" />
</Storyboard>
</VisualState>
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="PlaceholderTextContentPresenter"
Storyboard.TargetProperty="Opacity" Duration="0" To="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxFocusedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Border x:Name="BorderElement" Grid.Row="1" Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}" />
<ContentPresenter x:Name="HeaderContentPresenter" Grid.Row="0"
Style="{StaticResource HeaderContentPresenterStyle}"
Margin="{ThemeResource TextControlHeaderMarginThemeThickness}"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}" />
<ScrollViewer x:Name="ContentElement" Grid.Row="1"
MinHeight="{ThemeResource TextControlThemeMinHeight}"
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}"
Margin="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}" IsTabStop="False" ZoomMode="Disabled"
AutomationProperties.AccessibilityView="Raw" />
<ContentControl x:Name="PlaceholderTextContentPresenter" Grid.Row="1"
Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}"
FontSize="{ThemeResource ContentControlFontSize}"
Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
IsTabStop="False" Content="{TemplateBinding PlaceholderText}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
New Style :
<Style x:Key="ContentCenteredTextBox" TargetType="TextBox">
<Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
<Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
<Setter Property="Foreground" Value="{ThemeResource TextBoxForegroundThemeBrush}" />
<Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
<Setter Property="Background" Value="{ThemeResource TextBoxBackgroundThemeBrush}" />
<Setter Property="BorderBrush" Value="{ThemeResource TextBoxBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource TextControlBorderThemeThickness}" />
<Setter Property="FontFamily" Value="{ThemeResource PhoneFontFamilyNormal}" />
<Setter Property="FontSize" Value="{ThemeResource ContentControlFontSize}" />
<Setter Property="TextWrapping" Value="NoWrap" />
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}" />
<Setter Property="VerticalContentAlignment" Value="Center"></Setter>
<Setter Property="Margin" Value="{ThemeResource TextControlMarginThemeThickness}" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid Background="Transparent">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentElement"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames
Storyboard.TargetName="PlaceholderTextContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxDisabledHeaderForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Normal">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Opacity" Duration="0"
To="{ThemeResource TextControlBorderThemeOpacity}" />
</Storyboard>
</VisualState>
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="PlaceholderTextContentPresenter"
Storyboard.TargetProperty="Opacity" Duration="0" To="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource TextBoxFocusedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Border x:Name="BorderElement" Grid.Row="1" Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}" />
<ContentPresenter x:Name="HeaderContentPresenter" Grid.Row="0"
Style="{StaticResource HeaderContentPresenterStyle}"
Margin="{ThemeResource TextControlHeaderMarginThemeThickness}"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}" />
<ContentControl x:Name="ContentElement" Grid.Row="1"
MinHeight="{ThemeResource TextControlThemeMinHeight}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}"
IsTabStop="False"
AutomationProperties.AccessibilityView="Raw" />
<ContentControl x:Name="PlaceholderTextContentPresenter" Grid.Row="1"
Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}"
FontSize="{ThemeResource ContentControlFontSize}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
IsTabStop="False" Content="{TemplateBinding PlaceholderText}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Your welcome :-)

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