Row hover background in DataGrid

[juusimaa]

I have test app where I have defined DataGrid background colors for selected and hover rows in App.xaml:

<SolidColorBrush x:Key="MaterialDesign.Brush.DataGrid.Selected" Color="LightSalmon" />
<SolidColorBrush x:Key="MaterialDesign.Brush.DataGrid.RowHoverBackground" Color="LightGreen"/>

This work like expected, hovering background color changes when mouse is over:

Screen.Recording.2025-11-03.080150.mp4

But when I enable alternating background color for the DataGrid hover color is not changing for those alternating rows:

Screen.Recording.2025-11-03.080458.mp4

When mouse is over alternating background color is shown instead defined hover color. Is there some way to make background color to change when mouse is over if alternating coloring is in use?

This is the xaml-file used:

<Window x:Class="TestingMaterialDesignXaml.MainWindow"
        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:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800"
        Style="{StaticResource MaterialDesignWindow}"
        x:Name="This">

    <Window.Resources>
        <Style TargetType="DataGridCell" BasedOn="{StaticResource {x:Type DataGridCell}}">
            <Style.Triggers>
                 <!--Selected, not mouse over--> 
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsSelected" Value="True"/>
                        <Condition Property="IsMouseOver" Value="False"/>
                    </MultiTrigger.Conditions>
                    <Setter Property="BorderBrush" Value="Transparent"/>
                    <Setter Property="BorderThickness" Value="0"/>
                </MultiTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>

    <StackPanel VerticalAlignment="Center">
            <DataGrid x:Name="DataGrid" 
                      AutoGenerateColumns="False" 
                      Margin="10" 
                      materialDesign:DataGridAssist.SelectedCellBorderBrush="Transparent"
                      AlternatingRowBackground="LightCyan"
                      ItemsSource="{Binding ElementName=This, Path=Items}"
                      SelectionUnit="FullRow"
                      BorderThickness="0"
                      IsReadOnly="True"
                      CanUserAddRows="False"
                      CanUserDeleteRows="False">
                <DataGrid.Columns>
                    <DataGridTextColumn Header="Name" Binding="{Binding Name}" Width="200"/>
                    <DataGridTextColumn Header="Value" Binding="{Binding Value}" Width="*"/>
                </DataGrid.Columns>
            </DataGrid>
    </StackPanel>
</Window>

[corvinsz]

@juusimaa just to grasp your problem:
the bug you are reporting is that the MaterialDesign.Brush.DataGrid.RowHoverBackground does not take precedence over the AlternatingRowBackground?
If so, can you please open an issue so this bug can be tracked a little easier?

Minimal repro (to my understanding):

<DataGrid AlternatingRowBackground="Green"
          CanUserAddRows="False"
          CanUserDeleteRows="False"
          IsReadOnly="True"
          ItemsSource="{Binding Numbers}">
  <DataGrid.Resources>
    <SolidColorBrush x:Key="MaterialDesign.Brush.DataGrid.RowHoverBackground" Color="Red" />
  </DataGrid.Resources>
  <DataGrid.Columns>
    <DataGridTextColumn Binding="{Binding .}" Header="Number" />
  </DataGrid.Columns>
</DataGrid>

public partial class MainWindow
{
    public List<int> Numbers { get; }
    public MainWindow()
    {
        Numbers = Enumerable.Range(0, 100).ToList();
        DataContext = this;
        InitializeComponent();
    }
}

[juusimaa]

I wasn't sure if this is a feature or bug but I'll create a new issue for this.

[juusimaa]

Issue created: #3964