Develop Reference

how to give height of a parent to child in UWP

I have a stack panel and it has one grid and I'd like the grid to have same height as stack panel.
I tried playing with VerticalAlignment stretch or height 100% nothing works
I tried setting the values programatically OnNavigatedTo but it doesn't have the effect
Any suggestions to resolve this are welcome
Please find the code below
<StackPanel Grid.Row="0" Grid.RowSpan="4" Background="#CFFF" Visibility="Visible" Orientation="Vertical" Name="ProgressOverlay">
<Grid Name="Overlaygrid"">
<StackPanel VerticalAlignment="Center" Grid.Row="0">
<ProgressBar
IsIndeterminate="True"
IsEnabled="True" Foreground="Black"/>
<TextBlock Visibility="Visible" Foreground="Black" FontSize="25” T HorizontalAlignment="Center" Text="Loading"/>
</StackPanel>
</Grid>
</StackPanel>

A StackPanel takes by default the size needed by its content and shrinks to the size required, while a container control like Grid stretches to the full size available (e.g full page).
If you want to keep the outer StackPanel, you will have to set VerticalAlignment="Stretch" on the StackPanel, not on the Grid.
But since the Grid is the only single content item in your outer StackPanel, you can remove it and move the properties Grid.RowSpan="4" Background="#CFFF" Visibility="Visible" to the Grid. Always try to keep your XAML structure as simple as possible.

A ListBox inside a stackpanel doesn't work

I have these controls:
<StackPanel>
<TextBlock Text="Bill Benson"/>
<Image Source="/Assets/Images/BB.png"/>
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text=""/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<TextBlock Text="ends: 2015"/>
</StackPanel>
ListBox may have any number of items inside it. I want the whole page scroll from top to bottom, but it doesn't scroll down-up. How can I do that? I know the problem is because a scrollable control inside another scrollable one, but don't know how to fix it.

You need to assign the height to the listbox control, as it is taking an auto which means that the height keeps on increasing according to the count of items in it, so its impossible to access the items in the bottom of the control, So either give it a height or instead of stackpanel keep it in a grid with row definitions.
<StackPanel>
<TextBlock Text="Bill Benson"/>
<Image Source="/Assets/Images/BB.png"/>
<ListBox Height="200">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text=""/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<TextBlock Text="ends: 2015"/>
</StackPanel>

Try specifying a height for your controls, especially StackPanel and ListBox, even just an "Auto" Height could work for testing. Also, rather than setting an ItemTemplate, which would be more useful if you had a List of items to bind the ListBox to, try some hardcoded values:
<ListBox>
<TextBlock Text="1"/>
<TextBlock Text="Test"/>
<TextBlock Text="Another"/>
<TextBlock Text="testing"/>
<TextBlock Text="Sample"/>
</ListBox>
Try to add more than the ListBox can show, and see if it scrolls.

Try a dock panel instead:
<DockPanel>
<StackPanel DockPanel.Dock="Top">
<TextBlock Text="Bill Benson"/>
<Image Source="/Assets/Images/BB.png"/>
</StackPanel>
<TextBlock DockPanel.Dock="Bottom" Text="ends: 2015"/>
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text=""/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DockPanel>
The ListBox will automatically expand to fill the space. Note: It has to be the last child in the DockPanel. (You can change this functionality using LastChildFill="False")

XAML Element Alignment issue

I have a list view that will contain notes that I input. I am having trouble figuring out how to have the list view item look how I want it to.
Below is how it should look:
And this is what it currently looks like:
How do I write the list view item in XAML so that the Date and time appear to the very top-right of each list view item, with the text of the note to the left?
<ListView x:Name="list" ItemsSource="{Binding Note}" BorderBrush="{x:Null}" BorderThickness="0">
<DataTemplate>
<ListViewItem>
<StackPanel Orientation="Horizontal">
</StackPanel>
</ListViewItem>
</DataTemplate>
</ListView>
Any help at all is much appreciated!

You are missing a number of elements required in order to get your screen to look the way you want.
You need to define the ItemTemplate for the ListView. You're on the right track here, it is a DataTemplate declared in XAML, you just have to apply it to the ListView.ItemTemplate property.
You need to set the HorizontalContentAlignment of the ListView to Stretch (the default is Left, which means your items will not fill the entire content area).
You need to use a DockPanel (or other similar panel) inside your DataTemplate to place your date content on the right, and the remainder of your content on the left.
You need to disable Horizontal Scrolling (ScrollViewer.HorizontalScrollBarVisbility) on the ListView in order to make your content wrap (otherwise it will just happily draw it all on one line).
I've included a sample ListView that should get you started.
<ListView
ItemsSource="{Binding Items}"
HorizontalContentAlignment="Stretch"
ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel>
<TextBlock
TextWrapping="Wrap"
Text="{Binding Date}"
Background="Magenta"
DockPanel.Dock="Right" />
<TextBlock Text="{Binding Content}" Background="Lime" />
</DockPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>

ScrollViewer in a listbox

I´m filling a listbox with a specific data, the code works fine, but I need to add a scrollviewer to the listbox because there are many elements inside, I tried to use a ScrolViewer and put inside the listbox, but doesn't work, here is the code
<StackPanel x:Name="Sites" Grid.Row="1" Orientation="Vertical">
<ListBox x:Name="ListSites" >
<ListBox.ItemTemplate>
<DataTemplate>
<Button Width="460" Height="120" Click="click" Name="btn">
<Button.Content>
<StackPanel Orientation="Vertical" Height="100" Width="460">
<TextBlock Width="460" Name="txtname" FontSize="22" Text="{Binding name}" Height="40" Foreground="CadetBlue" />
<TextBlock Width="460" Name="txtUrl" FontSize="22" Text="{Binding Url}" Height="60"/>
</StackPanel>
</Button.Content>
</Button>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>

I fixed it, simply adding the Height property in the ListBox control

If the ListBox is not given infinite space for height then it should automatically scroll when items overflow its boundaries. For instance, if the second Grid row outside your stackpanel has explicit or 'star' height set, the scrollbar in the listbox will show up automatically.
See also: Silverlight: Difficulty with ScrollViewer

You shouldn't need to add a ScrollViewer to your ListBox. It will start scrolling when it runs out of room.
However, because you've put the ListBox inside a StackPanel it won't ever think it's run out of room because the StackPanel grows infinitely in the direction of it's orientation to accommodate its contents.
You'll need to use a different container for your ListBox.

<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Vertical"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>

C# WPF Limit items per row in a Listview

My Listview:
<ListView ItemTemplate="{StaticResource GridViewItemTemplate}" Name="gridView_movies">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Left" VerticalAlignment="Top"/>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
</ListView>
Datatemplate of the list:
<DataTemplate x:Key="GridViewItemTemplate">
<StackPanel Orientation="Vertical" >
<Image Width="250" Height="290" Source="{Binding Image}"/>
<TextBlock Text="{Binding Title}" HorizontalAlignment="Center" VerticalAlignment="Top" FontSize="20"/>
</StackPanel>
</DataTemplate>
When i load this, all items are showed in one row, my question is, How can i show only 3 items per row instead of all items in one row.
Thanks for the attention.

Use
<UniformGrid Columns="3" .../>
instead of <StackPanel Orientation="Horizontal" .../> in ItemsPanelTemplate

Use a WrapPanel instead of a StackPanel. It doesn't allow you to directly specify the number of items per row, but you can set the width of each item, which is almost as good. When there is no space left on a row, it continues on the next row.
EDIT: you could also use a UniformGrid, as suggested by Bonial. The drawback is that if you can resize your UI and make the ListView wider, the number of items per row won't change, and they will be stretched to fill the space. Depending on what you want, it might be OK, but I think WrapPanel is a better option in most cases.

You want to replace that ListView.ItemsPanel StackPanel with a WrapPanel. It will get the job done. Once the WrapPanel has a width, it will then line wrap the items.