WPF DataGrid的LoadingRow事件

<Window x:Class="DataGridExam.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DataGridExam"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <local:ImageConverter x:Key="ImageConverter"></local:ImageConverter>
    </Window.Resources>
    <Grid>
        <DataGrid Name="gridProducts" AutoGenerateColumns="False" FrozenColumnCount="1" LoadingRow="gridProducts_LoadingRow_1">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Product" Width="175" Binding="{Binding Path=ModelName}"></DataGridTextColumn>
                <DataGridTextColumn Header="Price" Binding="{Binding Path=UnitCost,StringFormat={}{0:C}}"></DataGridTextColumn>
                <DataGridTextColumn Header="ModelNumber" Binding="{Binding Path=ModelNumber}"></DataGridTextColumn>
                <DataGridTextColumn Header="Description" Width="400" Binding="{Binding Path=Description}">
                    <DataGridTextColumn.ElementStyle>
                        <Style TargetType="{x:Type TextBlock}">
                            <Setter Property="TextWrapping" Value="Wrap"></Setter>                            
                        </Style>
                    </DataGridTextColumn.ElementStyle>
                </DataGridTextColumn>
                <DataGridTextColumn Header="CategoryID" IsReadOnly="True" Binding="{Binding Path=CategoryID}"></DataGridTextColumn>
                <DataGridTemplateColumn Header="Image" IsReadOnly="True">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Image Stretch="None" Source="{Binding Path=ProductImage,Converter={StaticResource ImageConverter}}"></Image>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
             </DataGrid.Columns>
        </DataGrid>
        
    </Grid>

</Window>

using ClassLibrary;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace DataGridExam
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            gridProducts.ItemsSource = StoreDB.GetProducts();
        }
       

        private void gridProducts_LoadingRow_1(object sender, DataGridRowEventArgs e)
        {
            Product p = (Product)e.Row.DataContext;
            if (p.UnitCost >= 10)
            {
                e.Row.Background = new SolidColorBrush(Colors.Orange);
            }
            else
            {
                e.Row.Background = new SolidColorBrush(Colors.White);
            }
        }
    }
}