WinUI DataGrid (CommunityToolkit.WinUI.UI.Controls) - Resize of height is not working when user shrink or expand column

Question

  <ctWinUI:DataGrid x:Name="DataGrid"
                    AutoGenerateColumns="False"
                    CanUserSortColumns="True"
                    GridLinesVisibility="All"
                    Sorting="DataGrid_Sorting"
                    Grid.Row="1">
      <ctWinUI:DataGrid.Resources>
          <SolidColorBrush x:Key="DataGridColumnHeaderBackgroundBrush"
                           Opacity=".5" />
          <Style TargetType="TextBlock" x:Key="WrapText">
              <Setter Property="TextWrapping" Value="Wrap"/>
          </Style>
      </ctWinUI:DataGrid.Resources>
      <ctWinUI:DataGrid.Columns>
          <ctWinUI:DataGridTextColumn Header="Rank"
                                      Binding="{Binding Rank}"
                                      Tag="Rank" />
          <ctWinUI:DataGridComboBoxColumn Header="Mountain"
                                          Binding="{Binding Mountain}"
                                          Tag="Mountain" />
          <ctWinUI:DataGridTextColumn Header="Height (m)"
                                      Binding="{Binding Height_m}"
                                      Tag="Height_m" />
          <ctWinUI:DataGridTextColumn Header="Range"
                                      Binding="{Binding Range}"
                                      Tag="Range" />
          <ctWinUI:DataGridTextColumn Header="Parent Mountain"
                                      Binding="{Binding Parent_mountain}" ElementStyle="{StaticResource WrapText}"
                                      Tag="Parent_mountain" />
      </ctWinUI:DataGrid.Columns>
  </ctWinUI:DataGrid>

I have set Wrap data for "Parent Mountain" column and if user resize (shrink) column (first snapshot) and then expand column (2nd Snapshot). Datagrid row height is not refreshing based on content and you can see height of column is more even data is less. Could you please help me to fix it?

Answer 1

Hi,
in WPF DataGrid you can set RowHeight to double.NaN. May be it works in CommunityToolkit.

<Window x:Class="WpfApp1.Window056"
        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"
        xmlns:local="clr-namespace:WpfApp056"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        mc:Ignorable="d"
        Title="Window056" Height="450" Width="800">
  <Window.DataContext>
    <local:ViewModel/>
  </Window.DataContext>
    <Grid>
    <DataGrid ItemsSource="{Binding View}" AutoGenerateColumns="False" RowHeight="{x:Static sys:Double.NaN}">
      <DataGrid.Columns>
        <DataGridTextColumn Header="ID" Binding="{Binding ID}"/>
        <DataGridTextColumn Header="LongText" Binding="{Binding LongText}" Width="200">
          <DataGridTextColumn.ElementStyle>
            <Style>
              <Setter Property="TextBlock.TextWrapping" Value="Wrap" />
            </Style>
          </DataGridTextColumn.ElementStyle>
        </DataGridTextColumn>
      </DataGrid.Columns>
    </DataGrid>
    </Grid>
</Window>

Result: