How to Implement Conditional Cell Coloring in a WPF DataGrid?

Implementing conditional cell coloring in WPF DataGrid

In WPF DataGrid, dynamically customizing cell colors based on specific values ​​can enhance the visual presentation of data. Although using the DataGrid.CellStyle style seems intuitive, it applies to the entire row rather than individual cells.

Column based customization:

To achieve cell-specific color changes, consider adjusting the style based on the column, taking into account its different content. For example:

<code class="language-xml"><DataGridTextColumn Binding="{Binding Name}">
    <DataGridTextColumn.ElementStyle>
        <Style TargetType="TextBlock">
            <Style.Triggers>
                <Trigger Property="Text" Value="John">
                    <Setter Property="Background" Value="LightGreen"/>
                </Trigger>
            </Style.Triggers>
        </Style>
    </DataGridTextColumn.ElementStyle>
</DataGridTextColumn></code>

This example sets a light green background for cells containing "John" in the "Name" column.

Use value converter:

Alternatively, you can use the value converter to convert the data to color:

<code class="language-csharp">public class NameToBrushConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string input = (string)value;
        switch (input)
        {
            case "John":
                return Brushes.LightGreen;
            default:
                return DependencyProperty.UnsetValue;
        }
    }

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

How to use:

<code class="language-xml"><Window.Resources>
    <local:NameToBrushConverter x:Key="NameToBrushConverter"/>
</Window.Resources>
...
<DataGridTextColumn Binding="{Binding Name}">
    <DataGridTextColumn.ElementStyle>
        <Setter Property="Background" Value="{Binding Name, Converter={StaticResource NameToBrushConverter}}"/>
    </DataGridTextColumn.ElementStyle>
</DataGridTextColumn></code>

Direct attribute binding:

Finally, binding the Background property directly to a property that returns the desired brush provides an alternative approach. In this case, property change notification is needed when the dependency changes color.

The above is the detailed content of How to Implement Conditional Cell Coloring in a WPF DataGrid?. For more information, please follow other related articles on the PHP Chinese website!