Grid not covering all the screen in UWP app - xaml

Question

Why my grid is not covering all the screen and how can i fix it? On the designer looks like it should be covering all the width of the screen, but actually leaves a big space on the rigth.
<Grid Background="GreenYellow">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="200"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
</Grid>
This code is only a snip, but even with childs the space its there on different sizes.
Edit 1:
Acoording to Luis C. answer i get the same result big empty space to the left:
I found a strange workaround to achieve what i want:
<Grid Background="Yellow">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="200"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0">
<TextBlock Text="This is a very large text that only is used to strech all the childrens to the infinite. This is a very large text that only is used to strech all the childrens to the infinite. This is a very large text that only is used to strech all the childrens to the infinite. This is a very large text that only is used to strech all the childrens to the infinite. This is a very large text that only is used to strech all the childrens to the infinite" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
<Button Content="Black" Background="Black" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
</Grid>
<Button Grid.Row="1" Content="Black" Background="Gray" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
<Button Grid.Row="2" Content="Black" Background="Blue" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
</Grid>
The result is:
Still its a very strange way to workaround the problem.
Full Code
As you see, im using a SplitView on a GridView that loads Pages(like the one with the mentioned problem) on a Frame inside the SplitViewContent. Other Pages with TextBlock as childrens cover the whole screen as i want. The code for the SplitView is:
<Page
x:Class="MyProject.ViewModels.HomePage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyProject.ViewModels"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<RelativePanel>
<Button Name="HamburgerButton" FontFamily="Segoe MDL2 Assets" Content="" FontSize="36" Click="HamburgerButton_Click" Background="LightGray"/>
<!--<Button Name="BackButton" FontFamily="Segoe MDL2 Assets" Content="" FontSize="36" Visibility="Visible" Background="LightGray"/>-->
<CommandBar Name="Bar" RelativePanel.AlignRightWithPanel="True" ClosedDisplayMode="Compact" RelativePanel.RightOf="HamburgerButton" Visibility="Visible" Background="LightGray" IsOpen="False" IsSticky="True" >
<CommandBar.Content>
<TextBlock Name="BarTitle" Text="Title" FontSize="24" Margin="24,8,0,12" HorizontalAlignment="Center" VerticalAlignment="Center" />
</CommandBar.Content>
</CommandBar>
</RelativePanel>
<SplitView Name="MySplitView"
Grid.Row="1"
DisplayMode="Overlay"
OpenPaneLength="200"
CompactPaneLength="56"
HorizontalAlignment="Left">
<SplitView.Pane>
<ListBox SelectionMode="Single"
Name="IconsListBox"
SelectionChanged="IconsListBox_SelectionChanged">
<ListBoxItem Name="SymbolsListBoxItem">
<StackPanel Orientation="Horizontal">
<Image Source="x" Width="36" Height="36" HorizontalAlignment="Center" VerticalAlignment="Center"> </Image>
<TextBlock x:Uid="Symbols" Text="[Symbols]" FontSize="24" Margin="20,0,0,0" />
</StackPanel>
</ListBoxItem>
</ListBox>
</SplitView.Pane>
<SplitView.Content >
<Frame Name="FrameHolder"></Frame>
</SplitView.Content>
</SplitView>
<Frame Name="HomePageFrame" >
<!-- Frame not used by now-->
</Frame>
</Grid>
The full code page snippet is(with more children) and the result the same, big blank empty space to the right:
<Page
x:Class="MyProject.ViewModels.SymbolsPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyProject.ViewModels"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:data="using:MyProject.Models"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<Style TargetType="ListView" x:Key="myListViewStyle">
<Setter Property="AllowDrop" Value="False" />
<Setter Property="CanReorderItems" Value="False" />
<Setter Property="Width" Value="36"/>
<Setter Property="Height" Value="140"/>
<Setter Property="HorizontalAlignment" Value="Center"/>
<Setter Property="Padding" Value="0,4,0,0"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
<Setter Property="BorderBrush" Value="White" />
<Setter Property="BorderThickness" Value="1" />
</Style>
<Style TargetType="TextBlock" x:Key="SymbolViewer">
<Setter Property="FontFamily" Value="/Fonts/etc"/>
<Setter Property="FontSize" Value="30" />
<Setter Property="Padding" Value="8"/>
<Setter Property="TextAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
</Style>
<LinearGradientBrush x:Key="GradBackground" EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="LightGray" Offset="0"/>
<GradientStop Color="White" Offset=".5"/>
<GradientStop Color="LightGray" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="ItemGradBackground" EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="White" Offset=".5"/>
<GradientStop Color="LightGray" Offset="1"/>
</LinearGradientBrush>
</Page.Resources>
<!-- Spinners -->
<StackPanel Background="AliceBlue" HorizontalAlignment="Stretch" Padding="0">
<StackPanel Background="{StaticResource GradBackground}" >
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center" >
<ListView Name="Uno" ItemsSource="{x:Bind UnoItems}" Style="{StaticResource myListViewStyle}" BorderBrush="White"
BorderThickness="2" IsItemClickEnabled="True" ItemClick="Uno_ItemClick">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}" FontFamily="/Fonts/etc"></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<!-- Not user interactive-->
<TextBlock Text="0" Width="36" HorizontalAlignment="Center" VerticalAlignment="Center" TextAlignment="Center" ></TextBlock>
<!-- Spinner 2 -->
<ListView Name="Dos" ItemsSource="{x:Bind DosItems}" Style="{StaticResource myListViewStyle}"
IsItemClickEnabled="True" ItemClick="Dos_ItemClick">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}" ></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView Name="Tres" ItemsSource="{x:Bind TresItems}" Style="{StaticResource myListViewStyle}">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}" ></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView Name="Cuatro" ItemsSource="{x:Bind TresItems}" Style="{StaticResource myListViewStyle}">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}" ></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView Name="Cinco" ItemsSource="{x:Bind DosItems}" Style="{StaticResource myListViewStyle}">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}" ></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView Name="Seiss" ItemsSource="{x:Bind TresItems}" Style="{StaticResource myListViewStyle}">
<ListView.ItemTemplate >
<DataTemplate x:DataType="data:Thingy">
<TextBlock Text="{x:Bind Symbol}"></TextBlock>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackPanel>
</StackPanel>
</StackPanel>

Answer 1

You just need to remove the "RowDefinition" without height and change the "Auto" Rows to "*".
Something like this:
<Grid Background="GreenYellow">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="200"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Button Grid.Row="0" Content="Black" Background="Black" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
<Button Grid.Row="1" Content="Black" Background="Gray" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
<Button Grid.Row="2" Content="Black" Background="Blue" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
</Grid>