UWP Stretch GridView

Question

How to stretch GridViewItem horizontaly? Trying to set property HorizontalContentAlignment or style property in ItemContainerStyle. This does not help.

Here is a code:

<GridView ItemsSource="{x:Bind Banks}" SelectionMode="None" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch">
                <GridView.ItemContainerStyle>
                    <Style TargetType="GridViewItem">
                        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
                    </Style>
                </GridView.ItemContainerStyle>
                <GridView.ItemTemplate>
                    <DataTemplate x:DataType="model:Bank">
                        <Grid HorizontalAlignment="Stretch">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="auto" />
                                <RowDefinition Height="auto" />
                            </Grid.RowDefinitions>
                            <TextBlock Text="{Binding Name}" Grid.Column="0" />

                            <GridView ItemsSource="{x:Bind Departments}" Grid.Row="1" HorizontalContentAlignment="Stretch" IsItemClickEnabled="True" VerticalContentAlignment="Stretch">
                                <GridView.ItemContainerStyle>
                                    <Style TargetType="GridViewItem">
                                        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
                                    </Style>
                                </GridView.ItemContainerStyle>
                                <GridView.ItemTemplate>
                                    <DataTemplate x:DataType="model:Department">
                                        <Grid HorizontalAlignment="Stretch">
                                            <Grid.ColumnDefinitions>
                                                <ColumnDefinition Width="250" />
                                                <ColumnDefinition Width="*" />
                                                <ColumnDefinition Width="40" />
                                            </Grid.ColumnDefinitions>
                                            <Grid.RowDefinitions>
                                                <RowDefinition Height="auto" />
                                                <RowDefinition Height="auto" />
                                            </Grid.RowDefinitions>
                                            <TextBlock Text="{Binding Name}" Grid.Column="0" />
                                            <TextBlock Text="{Binding Address}" Grid.Column="0" Grid.Row="1" />

                                            <TextBlock Text="{Binding USD.Date}" Grid.Column="1" Grid.RowSpan="2"/>

                                            <TextBlock Text="{Binding USD.Sell}" Grid.Column="2" />
                                            <TextBlock Text="{Binding USD.Buy}" Grid.Column="2" Grid.Row="1"/>
                                        </Grid>
                                    </DataTemplate>
                                </GridView.ItemTemplate>
                            </GridView>
                        </Grid>
                    </DataTemplate>
                </GridView.ItemTemplate>
            </GridView>

Answer 1

By default,GridView uses ItemsWrapGrid as the panel to position and arrange GridViewItem, you can find this from Live Visual Tree:

Although you've set HorizontalContentAlignment or HorizontalAlignment to Stretch for GridViewItem, but the size of GridViewItem is limited by ItemsWrapGrid.

ItemsWrapGrid positions child elements sequentially from left to right or top to bottom in an ItemsControl that shows multiple items. When elements extend beyond the container edge, elements are positioned in the next row or column.

So in ItemsWrapGrid, items won't be stretched.

If you want to stretch GridViewItem horizontaly, we can use ItemsStackPanel instead of ItemsWrapGrid like following:

In Resources, add a ItemsPanelTemplate with ItemsStackPanel:

<Page.Resources>
    <ItemsPanelTemplate x:Key="MyItemsPanelTemplate">
        <ItemsStackPanel />
    </ItemsPanelTemplate>
</Page.Resources>

Then use this template in GridView:

<GridView HorizontalContentAlignment="Stretch"
          VerticalContentAlignment="Stretch"
          ItemsPanel="{StaticResource MyItemsPanelTemplate}"
          ItemsSource="{x:Bind Banks}"
          SelectionMode="None">
    ...
        <GridView Grid.Row="1"
              HorizontalContentAlignment="Stretch"
              VerticalContentAlignment="Stretch"
              IsItemClickEnabled="True"
              ItemsPanel="{StaticResource MyItemsPanelTemplate}"
              ItemsSource="{x:Bind Departments}">
        ...
        </GridView>
    ...
</GridView>

Or we can use ListView instead of GridView as ListView's default ItemsPanel is ItemsStackPanel.