I've got a Datagrid with 3 columns.

Now i want to change the highlight of the row conditionally. like: if the value in column 2 is greater than XX change row color to Red.

I've already tried something, but without success:

<DataGrid Name="DataGrid1" Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="3" AlternatingRowBackground="LightGray"  ItemsSource="{Binding}" AutoGenerateColumns="False" FontSize="18" CanUserResizeColumns="False" CanUserReorderColumns="False" CanUserSortColumns="False" CanUserAddRows="False">
        <DataGrid.RowStyle>
            <Style TargetType="DataGridRow">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Steckzyklen}" Value="&lt; 20">
                        <Setter Property="Background" Value="#FFFF4848"></Setter>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </DataGrid.RowStyle>
        <DataGrid.Columns>
            <DataGridTextColumn Header="Steckplatz"  Binding="{Binding Name}" Width="200"/>
            <DataGridTextColumn Header="Steckzyklen"  Binding="{Binding Steckzyklen}" Width="200"/>
            <DataGridTextColumn Header="Austauschdatum"  Binding="{Binding Austauschdatum}" Width="200"/>
        </DataGrid.Columns>
    </DataGrid>

In this line: DataTrigger Binding="{Binding Steckzyklen}" Value="&lt 20" I tried ti do it with the &lt but without succes.

Someone knows how to make it work? Preferably by only changing something in the XAML.

Thanks in advance!

CodePudding user response：

You can change the Style as follows:

Create a new Converter:

    public class IsEqualOrLessThanConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            int intValue = (int)value;
            int compareToValue = Int32.Parse(parameter.ToString() ?? string.Empty);

            return intValue <= compareToValue;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

And then:

<Style TargetType="DataGridRow">
    <Style.Triggers>
        <DataTrigger Binding="{Binding Steckzyklen, Converter={StaticResource IsEqualOrLessThanConverter}, ConverterParameter=20}" Value="True">    
            <Setter Property="Foreground" Value="#FFFF4848"/>
            <Setter Property="Background" Value="Yellow"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

CodePudding user response：

I Implemented @Ohad Cohen's Method, but i get very weird results. Just random Rows are being highlighted.

Picture: Row Highlighting