Using a scroll in a xamarin.forms listview - xaml

Question

I am returning about 20 rows of data in my listview and it is just showing 12.
How can I introduce a scroll in my listview below. I tried putting a scrollview around it but no luck.
<StackLayout Grid.Column="1" Orientation="Vertical" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand" Padding="0" Spacing="0">
<SearchBar x:Name="searchBar" Placeholder="Search" SearchCommandParameter="{Binding Source={x:Reference searchBar}, Path=Text}"/>
<StackLayout VerticalOptions="FillAndExpand">
<StackLayout VerticalOptions="FillAndExpand" Padding="1" BackgroundColor="Black">
<ListView x:Name="dataList" BackgroundColor="White">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Label FontSize="20" VerticalOptions="CenterAndExpand" TextColor="Black" Text="{Binding HeadLines}"></Label>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</StackLayout>
</StackLayout>

Answer 1

Answer
Your XAML structure is wrong. Please have a look my code, and try it. Hope, It will help you.
Code
<Grid VerticalOptions="FillAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<SearchBar Grid.Column="0" x:Name="searchBar" Placeholder="Search" SearchCommandParameter="{Binding Source={x:Reference searchBar}, Path=Text}" />
<ListView Grid.Column="2" x:Name="dataList" BackgroundColor="White">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Label FontSize="20" VerticalOptions="CenterAndExpand" TextColor="Black" Text="{Binding HeadLines}">
</Label>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>