根据其值(C#，WPF)设置DataGrid单元格背景

<DataGrid x:Name="myDataGrid" AutoGenerateColumns="False">
    <!-- Define columns here -->
</DataGrid>

public class MyDataItem
{
    public string Value { get; set; }

    public MyDataItem(string value)
    {
        Value = value;
    }
}

ObservableCollection<MyDataItem> dataItems = new ObservableCollection<MyDataItem>();
myDataGrid.ItemsSource = dataItems;

<DataGrid.Columns>
    <DataGridTextColumn Header="Value" Binding="{Binding Value}">
        <DataGridTextColumn.CellStyle>
            <Style TargetType="DataGridCell">
                <Setter Property="Background" Value="White"/>
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Value}" Value="SomeValue">
                        <Setter Property="Background" Value="Green"/>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Value}" Value="AnotherValue">
                        <Setter Property="Background" Value="Yellow"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </DataGridTextColumn.CellStyle>
    </DataGridTextColumn>
</DataGrid.Columns>

dataItems.Add(new MyDataItem("SomeValue"));
dataItems.Add(new MyDataItem("AnotherValue"));