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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>

How to increase the height of the UWP calender date picker?

I have added UWP calendar date picker. Here is the XAML code
<CalendarDatePicker Background="White" Grid.Row="6" Width="660" VerticalAlignment="Stretch" FontSize="48" PlaceholderText="Date of Birth" Padding="0" Margin="0" x:Name="DobDatePicker"></CalendarDatePicker>
But the problem is that I can't change the height of that calendar textblock control(not the pop up). I tried by setting the minimum height, but it does n't work. Is there any way to fix this issue?

CalenderDatePicker has hardcoded value(32) for its rowdefinition in default style. So, You can modify that particular part of the CalenderDatePicker default style to change the height.
//Portion to modified
<Style TargetType="CalendarDatePicker">
....
....
<Grid x:Name="Root">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="32" /> /* change your value */
</Grid.RowDefinitions>
....
....
</Style>
Screenshot for your reference
Complete Style for your reference
//C# Code
<CalendarDatePicker>
<CalendarDatePicker.Style>
<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">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="32" />
</Grid.RowDefinitions>
<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>
</VisualStateManager.VisualStateGroups>
<FlyoutBase.AttachedFlyout>
<Flyout Placement="Bottom">
<Flyout.FlyoutPresenterStyle>
<Style TargetType="FlyoutPresenter">
<Setter Property="Padding" Value="0" />
<Setter Property="BorderThickness" Value="0" />
<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>
<ContentPresenter x:Name="HeaderContentPresenter"
x:DeferLoadStrategy="Lazy"
Margin="{ThemeResource ComboBoxHeaderThemeMargin}"
Visibility="Collapsed"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
TextWrapping="Wrap"/>
<Border x:Name="Background"
Grid.Row="1"
Grid.ColumnSpan="2"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}"
Control.IsTemplateFocusTarget="True" />
<TextBlock x:Name="DateText"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForeground}"
Text="{TemplateBinding PlaceholderText}"
Grid.Row="1"
FontSize="15"
Padding="12, 0, 0, 2"
VerticalAlignment="Center" />
<FontIcon x:Name="CalendarGlyph"
Glyph=""
FontFamily="{ThemeResource SymbolThemeFontFamily}"
Foreground="{ThemeResource CalendarDatePickerCalendarGlyphForeground}"
Grid.Row="1"
Grid.Column="1"
FontSize="16"
HorizontalAlignment="Center"
VerticalAlignment="Center" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</CalendarDatePicker.Style>
</CalendarDatePicker>

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>

c# uwp Toolkit ImageEx cycle detected

In UWP I have this:
<GridView x:Name="gvList"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ScrollViewer.HorizontalScrollMode="Disabled"
ScrollViewer.VerticalScrollBarVisibility="Hidden"
ScrollViewer.VerticalScrollMode="Enabled"
VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
ItemTemplate="{StaticResource Template}"
Grid.Row="1"
ItemContainerStyle="{StaticResource ListViewNoAnimationStyle}">
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid Orientation="Horizontal"/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
</GridView>
My datatemplate is like this:
<DataTemplate x:Key="Template" x:DataType="data:Item">
<customControls:CustomControl
Model="{x:Bind Mode=OneWay}"
Width="{Binding ItemWidth, ElementName=customListControl}"
Height="{Binding ItemHeight, ElementName=customListControl}"
ItemPadding="{Binding ItemPadding, ElementName=customListControl}"/>
</DataTemplate>
In CustomControl there is one ImageEx control:
<controls:ImageEx x:Name="imageBackground" Source="{x:Bind Image, Mode=OneWay}" Stretch="UniformToFill"/>
There are more then 500 items in list that is populating this GridView.
The problem is I get the "Layout cycle detected. Layout could not complete." error. If I use the Image instead of ImageEx, everything is working just fine.
But, I need to use ImageEx because it sets it's source asynchroniously, so it populates everything without blocking the UI.
Anyone got idea about this?

Thanks to user AVK and his link https://github.com/Microsoft/UWPCommunityToolkit/issues/1328, I have added this style to my App, and it fixed the issue with ImageEx Layout cycle problem:
<Style TargetType="controls:ImageEx">
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="{ThemeResource ApplicationForegroundThemeBrush}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="controls:ImageEx">
<Grid Background="{TemplateBinding Background}">
<Image
Name="PlaceholderImage"
HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
VerticalAlignment="{TemplateBinding VerticalAlignment}"
Opacity="1.0"
Source="{TemplateBinding PlaceholderSource}"
Stretch="{TemplateBinding PlaceholderStretch}" />
<Image
Name="Image"
HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
VerticalAlignment="{TemplateBinding VerticalAlignment}"
NineGrid="{TemplateBinding NineGrid}"
Opacity="0.0"
Stretch="{TemplateBinding Stretch}" />
<ProgressRing
Name="Progress"
Margin="16"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Background="Transparent"
Foreground="{TemplateBinding Foreground}"
IsActive="False"
Visibility="Collapsed" />
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Failed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Image" Storyboard.TargetProperty="Opacity">
<DiscreteObjectKeyFrame KeyTime="0" Value="0" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderImage" Storyboard.TargetProperty="Opacity">
<DiscreteObjectKeyFrame KeyTime="0" Value="1" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Loading">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Progress" Storyboard.TargetProperty="IsActive">
<DiscreteObjectKeyFrame KeyTime="0" Value="True" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Progress" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Visible" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Image" Storyboard.TargetProperty="Opacity">
<DiscreteObjectKeyFrame KeyTime="0" Value="0" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderImage" Storyboard.TargetProperty="Opacity">
<DiscreteObjectKeyFrame KeyTime="0" Value="1" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Loaded">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Progress" Storyboard.TargetProperty="IsActive">
<DiscreteObjectKeyFrame KeyTime="0" Value="False" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Progress" Storyboard.TargetProperty="Visibility">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation
AutoReverse="False"
BeginTime="0"
Storyboard.TargetName="Image"
Storyboard.TargetProperty="Opacity"
From="0"
To="1" />
<DoubleAnimation
AutoReverse="False"
BeginTime="0"
Storyboard.TargetName="PlaceholderImage"
Storyboard.TargetProperty="Opacity"
From="1"
To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Unloaded" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

How do I edit the style of a controls flyout in blend

I need to edit the design of a button-flyout but I can't find a reference to the flyout. In the Blend Object-Explorer I dont find any flyout at all:
So what's the trick to access the flyout. I saw there is a special TimePickerFlyout class https://msdn.microsoft.com/library/windows/apps/windows.ui.xaml.controls.timepickerflyout.aspx in UWP, but if I search for it inside my template or the project code, the only thing I find is TimePickerFlyoutButtonStyle in the Templates Ressources which, in my understanding, contains the storyboard information for the Buttons appearance.
<StackPanel.Resources>
<Style x:Key="TimePickerFlyoutButtonStyle" TargetType="Button">
<Setter Property="UseSystemFocusVisuals" Value="False"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Background="{TemplateBinding Background}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseMediumBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlPageBackgroundAltMediumBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseHighBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseMediumLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseHighBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightListAccentLowBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
<VisualState x:Name="PointerFocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter x:Name="ContentPresenter" AutomationProperties.AccessibilityView="Raw" BorderBrush="{ThemeResource SystemControlForegroundBaseMediumLowBrush}" BorderThickness="2" Background="{ThemeResource SystemControlBackgroundAltMediumLowBrush}" Content="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</StackPanel.Resources>

I did the following to change the TimePickerFlyout's background colour and the size of the buttons on its footer.
Navigate to C:\Program Files (x86)\Windows Kits\10\DesignTime\CommonConfiguration\Neutral\UAP\10.0.10240.0\Generic Note this may change depending on your SDK version
Open the generic.xaml file
Copy the TargetType="TimePickerFlyoutPresenter" section to your Assets\ControlStyles.xaml
Here is the xaml from the generic.xaml file...
<!-- Default style for Windows.UI.Xaml.Controls.TimePickerFlyoutPresenter -->
<Style TargetType="TimePickerFlyoutPresenter">
<Setter Property="Width" Value="242" />
<Setter Property="MinWidth" Value="242" />
<Setter Property="MaxHeight" Value="396" />
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Background" Value="{ThemeResource SystemControlBackgroundChromeMediumLowBrush}" />
<Setter Property="AutomationProperties.AutomationId" Value="TimePickerFlyoutPresenter" />
<Setter Property="BorderBrush" Value="{ThemeResource SystemControlForegroundTransparentBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource DateTimeFlyoutBorderThickness}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TimePickerFlyoutPresenter">
<Border x:Name="Background"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
MaxHeight="396">
<Grid x:Name="ContentPanel">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="44" />
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" x:Name="FirstPickerHostColumn" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" x:Name="SecondPickerHostColumn" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" x:Name="ThirdPickerHostColumn" />
</Grid.ColumnDefinitions>
<Rectangle x:Name="HighlightRect" Fill="{ThemeResource SystemControlHighlightListAccentLowBrush}" Grid.Column="0" Grid.ColumnSpan="5" VerticalAlignment="Center" Height="44" />
<Border x:Name="FirstPickerHost" Grid.Column="0" />
<Rectangle x:Name="FirstPickerSpacing" Fill="{ThemeResource SystemControlForegroundBaseLowBrush}" HorizontalAlignment="Center" Width="2" Grid.Column="1" />
<Border x:Name="SecondPickerHost" Grid.Column="2" />
<Rectangle x:Name="SecondPickerSpacing" Fill="{ThemeResource SystemControlForegroundBaseLowBrush}" HorizontalAlignment="Center" Width="2" Grid.Column="3" />
<Border x:Name="ThirdPickerHost" Grid.Column="4" />
</Grid>
<Grid Grid.Row="1" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Rectangle Height="2" VerticalAlignment="Top" Fill="{ThemeResource SystemControlForegroundBaseLowBrush}" Grid.ColumnSpan="2" />
<Button x:Name="AcceptButton" Grid.Column="0" Content="" FontFamily="{ThemeResource SymbolThemeFontFamily}" FontSize="16" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Style="{StaticResource DateTimePickerFlyoutButtonStyle}" Margin="0,2,0,0" />
<Button x:Name="DismissButton" Grid.Column="1" Content="" FontFamily="{ThemeResource SymbolThemeFontFamily}" FontSize="16" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Style="{StaticResource DateTimePickerFlyoutButtonStyle}" Margin="0,2,0,0" />
</Grid>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>