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How to add a separator to the Expander component in UWP app?

I'm looking for a way of implementing this kind of separator to the expander component in UWP app:
Any ideas how to do that?
I've managed to create the similar look of the expander, but I don't know how to implement separators?
Also, I would like to learn how to make expanders kind of "push" other components down when I expand them, so they don't overlap with other components, but simply move them.
Here's the XAML code for this expander:
<muxc:Expander x:Name="FontExpander"
x:Uid="FontExpander"
Width="1155"
IsExpanded="True"
Margin="22,323,0,0"
VerticalAlignment="Top"
Grid.Row="2"
Height="380"
HorizontalContentAlignment="Left"
ExpandDirection="Down">
<muxc:Expander.Header>
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Center">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<FontIcon Margin="0,0,12,0"
VerticalAlignment="Center"
Foreground="{ThemeResource TextFillColorPrimaryBrush}"
FontSize="16"
Glyph=""/>
<StackPanel Grid.Column="1"
Margin="0,12"
Orientation="Vertical">
<TextBlock x:Uid="SettingsFontTitle" Style="{StaticResource BodyTextBlockStyle}"/>
<TextBlock x:Uid="SettingsFontDescription"
Style="{StaticResource CaptionTextBlockStyle}"
Foreground="{ThemeResource TextFillColorSecondaryBrush}"
TextWrapping="WrapWholeWords"/>
</StackPanel>
</Grid>
</muxc:Expander.Header>
<muxc:Expander.Content>
<Grid Margin="-18,-170,-17,-170">
<TextBlock x:Name="SettingsFamily" x:Uid="SettingsFamily" Text="Family" Margin="50,51,1000,286"/>
<ComboBox x:Name="ComboBoxFamily" ItemsSource="{x:Bind Fonts}" Width="200" Margin="950,41,0,0" SelectionChanged="ComboBoxFamily_SelectionChanged" />
<TextBlock x:Name="SettingsStyle" x:Uid="SettingsStyle" Text="Style" Margin="50,106,995,218" Loaded="SettingsStyle_Loaded"/>
<ComboBox x:Name="ComboBoxStyle" Width="200" Margin="950,101,0,0">
<x:String>Regular</x:String>
</ComboBox>
<TextBlock x:Name="SettingsSize" x:Uid="SettingsSize" Text="Size" Margin="50,166,1002,158"/>
<ComboBox x:Name="ComboBoxSize" ItemsSource="{x:Bind FontSizes}" Width="200" Margin="950,161,0,0"/>
<TextBlock x:Name="Text" x:Uid="SettingsText" Text="Hello World! I am so excited to be here!" Margin="62,224,38,126" TextWrapping="Wrap" FontSize="{x:Bind (x:Double)ComboBoxSize.SelectedValue, Mode=OneWay}" TextAlignment="Center"/>
</Grid>
</muxc:Expander.Content>
</muxc:Expander>
Any help would be much appreciated!

A separate can for example be implemented using a Border or a Grid:
<Grid Background="DarkGray" Height="1" />
As a side note, you shouldn't use margins to position your elements. Use an appropriate layout Panel. Using a Grid, you should add ColumnDefinitions and RowDefinitions to it as examplified here.

UWP XAML Button with image and text in a Hub [duplicate]

This question already has an answer here:
How do I place a text over a image in a button in WinRT
(1 answer)
Closed 5 years ago.
I am learning different ways of achieving certain layouts with XAML in UWP (I know I'm late to the party but I just started with the UWP stuff!)
What I am trying to achieve is a main navigation page kind of thing from a hub control on my main page. At every HubSection, I will have button on each column of a 2-column grid, which will contain buttons. Ive'tried something similar to this post but the debugger kept failing to attach to my UWP app when I used images instead of textblocks.
Essentially, what I've got until now is something like this: (I've shared my code down below)
But what I am trying to achieve is each button having its own image background and a separate TextBlock with semi-transparent background at the bottom centre of the button... (I've only photo shopped it, this is the thing I am trying to achieve...)
So this is what I've tried so far... I've also tried the relative panel but no luck...
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200" />
<ColumnDefinition Width="200" />
</Grid.ColumnDefinitions>
<StackPanel Orientation="Vertical" Grid.Column="0" Margin="10,10,10,0">
<Button HorizontalAlignment="Stretch">
<Grid>
<TextBlock HorizontalAlignment="Center">Column 0 Item 1</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</Grid>
<StackPanel>
<TextBlock>Column 0 Item 1</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</StackPanel>
</Grid>
My complete code looks something like this for this page.
<Page
x:Class="VaultManager.Terminal.Views.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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="Black">
<Hub SectionHeaderClick="Hub_SectionHeaderClick">
<Hub.Header>
<Grid Margin="0,20,0,0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="80"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<TextBlock x:Name="pageTitle" Text="My Hub Sample" Style="{StaticResource SubheaderTextBlockStyle}" Grid.Column="1" IsHitTestVisible="false" TextWrapping="NoWrap" VerticalAlignment="Top"/>
</Grid>
</Hub.Header>
<HubSection Header="Overview">
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200" />
<ColumnDefinition Width="200" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="150" />
</Grid.RowDefinitions>
<StackPanel Orientation="Vertical" Grid.Column="0" Margin="10,10,10,0">
<Button HorizontalAlignment="Stretch">
<StackPanel>
<TextBlock>Column 0 Item 1</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</StackPanel>
</Button>
<Button HorizontalAlignment="Stretch" >
<RelativePanel>
<TextBlock>Column 0 Item 2</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</RelativePanel>
</Button>
</StackPanel>
<StackPanel Orientation="Vertical" Grid.Column="1" Margin="10,10,10,10">
<Button HorizontalAlignment="Stretch">
<StackPanel>
<TextBlock>Column 1 Item 1</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</StackPanel>
</Button>
<Button HorizontalAlignment="Stretch" >
<StackPanel>
<TextBlock>Column 1 Item 2</TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</StackPanel>
</Button>
</StackPanel>
</Grid>
</DataTemplate>
</HubSection>
<HubSection Header="Videos" Name="Videos">
<!-- yada yada -->
</HubSection>
<HubSection Header="Audios" Name="Audios">
<!-- blah blah -->
</HubSection>
</Hub>
</Grid>

Good job giving us all that info. You may want to take a look here since the asker in that question seems to have had a similar issue. The answerer suggested using a Grid instead of a StackPanel. Hope that helps. After that, you should be able to adjust the transparency of the text. If you are using visual studio you can just click on the text element and adjust the background brush from the Properties tab. The button w/ the image should look like this:
<Button HorizontalAlignment="Stretch">
<Grid>
<TextBlock Text = "Column 0 Item 1">
<TextBlock.Background>
<SolidColorBrush Color="(**Colour here**)" Opacity = "(**Opacity Here {1 being opaque and 0 being transparent}**)/>
</TextBlock.Background></TextBlock>
<Image Source="/Assets/Artwork/150x150/RobCos_Worst_Nightmare_trophy.jpg" Stretch="None" />
</Grid>
</Button>

ComboBox items in full-mode and normal-mode

I want to show an accent color chooser like what is built-in in the system.
When It's in full mode, I want it to appear as tiles with available colors, and when it appears as a drop-down list, I want it to appear as a little square and color name next to it.
The problem is that I don't know how to set two templates for full-mode and drop-down mode.
<ComboBox SelectionChanged="AccentColor_SelectionChanged">
<ComboBoxItem>
<ComboBoxItem.Content>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Rectangle Grid.Column="0" Fill="Yellow" Width="20" Height="20"/>
<TextBlock Grid.Column="1" Text="Yellow" />
</Grid>
</ComboBoxItem.Content>
</ComboBoxItem>
<ComboBoxItem>
<ComboBoxItem.Content>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Rectangle Grid.Column="0" Fill="Blue" Width="20" Height="20"/>
<TextBlock Grid.Column="1" Text="Blue" />
</Grid>
</ComboBoxItem.Content>
</ComboBoxItem>
</ComboBox>
This works only for drop down mode. How can I achieve it? (It's a Windows PHone Runtime app).

normally in wp8 when number of items in a dropdownlist becomes more than 5 items it will automatically turns to a full screen mode.else it will show in just a drop list..
In listpicker there is a property call ExpantionMode..try that or following link will help you..
http://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh868195.aspx

try this..just edit as per your requirement.
I have just pasted my code.
<wpToolkit:ListPicker Name="cmbCountry" Background="#FFF9E2" Foreground="#333333" Grid.Column="0" ExpansionMode="FullScreenOnly" ItemsSource="{Binding Countries}" SelectionChanged="cmbCountry_SelectionChanged_1">
<wpToolkit:ListPicker.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding CountryName}" FontSize="20"></TextBlock>
</DataTemplate>
</wpToolkit:ListPicker.ItemTemplate>
<wpToolkit:ListPicker.FullModeItemTemplate>
<DataTemplate>
<Border BorderBrush="#FFF9E2" BorderThickness="0,0,0,3">
<StackPanel Orientation="Horizontal" Width="425">
<TextBlock Text="{Binding CountryName}" FontSize="35"></TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</wpToolkit:ListPicker.FullModeItemTemplate>

How to make controls fill the container in WPF?

Below is my xaml code :
<Window x:Class="ScoresBank.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow">
<DockPanel LastChildFill="True">
<WrapPanel DockPanel.Dock="Top">
<ToolBar Height="25"></ToolBar>
</WrapPanel>
<WrapPanel DockPanel.Dock="Bottom">
<StatusBar Name="stbBottom" Height="25"
BorderThickness="2"
BorderBrush="Black">Example</StatusBar>
</WrapPanel>
<StackPanel DockPanel.Dock="Left">
<DockPanel LastChildFill="True">
<WrapPanel DockPanel.Dock="Top">
<Button Name="btnBrowseTags">TAGS</Button>
<Button Name="btnBrowseTitles">TITLES</Button>
</WrapPanel>
<ComboBox DockPanel.Dock="Top" Name="cbxCategory">
Example
</ComboBox>
<WrapPanel DockPanel.Dock="Bottom">
<TextBox Name="txtKeyword"></TextBox>
<Button Name="btnFind">Find</Button>
</WrapPanel>
<ListBox Name="lbxBrowse">
</ListBox>
</DockPanel>
</StackPanel>
<StackPanel DockPanel.Dock="Right">
<Button>Example</Button>
</StackPanel>
<Canvas>
</Canvas>
</DockPanel>
And this is my current layout view :
So, what I mean with filling the container are :
Making lbxBrowse to fill the mid-space of the DockPanel inside the left StackPanel.
Making txtKeyword to fill the WrapPanel.
Making stbBottom to fill the WrapPanel.
What I've tried :
It seems i've put them in a DockPanel with LastChildFill="True". But it seems doesn't work.
I don't know about this, since it's not possible to put it into a DockPanel first.
I don't know anything about this.
I don't use fixed size, since I need them to keep neat even when resized in multiple screen resolution. The fixed size on ToolBar and StatusBar seems required, otherwise, the text will be unseen.
P.S. If possible, I prefer the solution to be XAML code, rather than the C# code. Otherwise, C# code is fine too.
Thank you.

You should use a Grid. It is more easier to configure. Here is an example (I don't know exactly how you want to setup your layout).
<Window x:Class="SampleWpf.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="400" Width="600">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Button Margin="5" Content="TAGS"
Grid.Column="0" Grid.Row="0" />
<Button Margin="5" Content="TITLES"
Grid.Column="1" Grid.Row="0" />
<Button Margin="5" Content="EXAMPLES"
Grid.Column="2" Grid.Row="0"
HorizontalAlignment="Right"/>
<ComboBox Margin="5"
Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="1" />
<ListBox Margin="5"
Grid.Column="2" Grid.Row="1" Grid.RowSpan="2" />
<Button Margin="5" Content="EXAMPLE"
Grid.Column="2" Grid.Row="3" HorizontalAlignment="Left" />
</Grid>
</Window>
And the result:
With a grid you can set the height and the width of the columns and rows to a specific value (in points, pixels, cm, etc.), to column content (Auto) or proportional to the grid (with *).

Instead of using a StackPanel and DockPanel you can use Grid and set Grid.ColumnDefinitions and Grid.RowDefinitions. You can specify directly each row Height and each column Width. It's easier to use and it automaticly fit to content and container.

Design Xaml grid with height = 100% and minimum row height size

Here's the problem. I have a grid with some data written in xaml:
<ItemsControl x:Name="ItemsControl" ItemsSource="{Binding Path=MyObjectCollection, UpdateSourceTrigger = PropertyChanged}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid Width="Auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="27"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="30"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" MaxHeight="75" MinHeight="30"></RowDefinition>
</Grid.RowDefinitions>
<Label Name="LabelNumber" Content="{Binding ObjectID}" Grid.Column="0" Style="{StaticResource MyStyleLabel}" />
<control:FocusMeterControl x:Name="HorizontalFocusMeterControl" Value="{Binding ObjectProperty}" Height="Auto" Grid.Column="1" />
<Button Name="RemoveObject" Content="-" Grid.Column="2" Margin="5,0,0,0" Click="ButtonBase_OnClick" Tag="{Binding Point}" Style="{StaticResource MyStyleButton}" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
As you can see I'm creating a new grid for each member in my "MyObjectCollection". Ideally I think I should just create one row instead since this would make my next problem - the real problem easier.
However, I have not found any good way to do this in xaml if even possible. Is this possible without populating the collection manually from c# and setting a row-property in my objects manually in order to do something like this
<Label Name="LabelNumber" Grid.Row="{Binding ManuallyCalculatedRowID}" ... />
My primary problem is that I would like the grid/rows to all be equally high and if possible fill out the parent window. If the parent window is way too large MaxHeight should apply and I would just like some empty space below.
The parent control is a Windows Form ElementHost if that makes any difference.
Please let me know if you need any additional info.

To make all rows of equal hight we can use ItemsPanelTemplate and set it to UniformGrid that will take care of equal sizing problem:
<ItemsControl x:Name="ItemsControl" ItemsSource="{Binding Path=MyObjectCollection, UpdateSourceTrigger = PropertyChanged}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="1" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid Width="Auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="27"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="30"/>
</Grid.ColumnDefinitions>
<Label Name="LabelNumber" Content="{Binding ObjectID}" Grid.Column="0" Style="{StaticResource MyStyleLabel}" />
<control:FocusMeterControl x:Name="HorizontalFocusMeterControl" Value="{Binding ObjectProperty}" Height="Auto" Grid.Column="1" />
<Button Name="RemoveObject" Content="-" Grid.Column="2" Margin="5,0,0,0" Click="ButtonBase_OnClick" Tag="{Binding Point}" Style="{StaticResource MyStyleButton}" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Note that I removed row definition in ItemTemplate to lift vertical size restrictions for items. Not sure if that answers your question but that can be good starting point on the road to solution.