silverlight中DataGrid数据高亮显示

<UserControl xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"  xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"  x:Class="SilverlightGridData.MainPage"
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:thislocal="clr-namespace:SilverlightGridData.Util"
mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
<UserControl.Resources>
<thislocal:ColorConvert x:Key="ConverColor"></thislocal:ColorConvert>
</UserControl.Resources>
<Grid x:Name="LayoutRoot"  >
<controls:TabControl  Height="350" Width="500">
<controls:TabItem Name="选项一" Header="选项卡">
<StackPanel>

<data:DataGrid FrozenColumnCount="2" HorizontalAlignment="Center" VerticalContentAlignment="Center" Height="280" Width="480" Name="Datagrid1" Margin="0,10,0,0" AutoGenerateColumns="False">
<data:DataGrid.Columns  >
<data:DataGridTemplateColumn Header="姓名"   >
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<TextBlock Text="{Binding Name}"    Width ="100"   Foreground="{Binding Path=Name,Converter={StaticResource ConverColor}}">
</TextBlock>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="年龄"   >
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<TextBlock Text="{Binding Age}"   Canvas.Top="100" Canvas.Left="100" Foreground="{Binding Path=Age,Converter={StaticResource ConverColor}}">
<Run Foreground="Red">as</Run>
</TextBlock>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="学校"   >
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<TextBlock Text="{Binding School}"   Canvas.Top="100" Canvas.Left="100" Foreground="{Binding Path=School,Converter={StaticResource ConverColor}}">
<Run Foreground="Red">as</Run>
</TextBlock>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="年级"   >
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<TextBlock Text="{Binding Grade}"   Canvas.Top="100" Canvas.Left="100" Foreground="{Binding Path=Grade,Converter={StaticResource ConverColor}}">
<Run Foreground="Red">as</Run>
</TextBlock>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
</data:DataGridTemplateColumn>
<data:DataGridTemplateColumn Header="班级"   >
<data:DataGridTemplateColumn.CellTemplate >
<DataTemplate >
<TextBlock Text="{Binding Class}"   Canvas.Top="100" Canvas.Left="100" Foreground="{Binding Path=Class,Converter={StaticResource ConverColor}}">
<Run Foreground="Red">as</Run>
</TextBlock>
</DataTemplate>
</data:DataGridTemplateColumn.CellTemplate>
</data:DataGridTemplateColumn>
</data:DataGrid.Columns>
</data:DataGrid>
</StackPanel>

</controls:TabItem>

</controls:TabControl>

</Grid>
</UserControl>

public MainPage()
{
InitializeComponent();

this.Loaded += new RoutedEventHandler(MainPage_Loaded);
}

void MainPage_Loaded(object sender, RoutedEventArgs e)
{
list = new List<Student>();
list.Add(new Student { Name = "张三", Age = 6, School = "北京第一小学", Grade = "一年级", Class = "A2" });
list.Add(new Student { Name = "赵龙", Age = 7, School = "北京第二小学", Grade = "二年级", Class = "A1" });
list.Add(new Student { Name = "李锐", Age = 8, School = "北京第三小学", Grade = "六年级", Class = "A2" });
list.Add(new Student { Name = "宋敏", Age = 9, School = "北京第四小学", Grade = "三年级", Class = "A3" });
list.Add(new Student { Name = "吴晓", Age = 10, School = "北京第五小学", Grade = "四年级", Class = "A4" });
list.Add(new Student { Name = "张刚", Age = 11, School = "北京第六小学", Grade = "五年级", Class = "A5" });
list.Add(new Student { Name = "李刚", Age = 12, School = "北京第七小学", Grade = "六年级", Class = "A6" });

this.Datagrid1.ItemsSource = list;

}
public class Student
{

public string Name { get; set; }
public int Age { get; set; }
public string School { get; set; }
public string Grade { get; set; }
public string Class { get; set; }

}

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
// 根据文字显示颜色
if (value.Equals("张三"))
{
return "Red";
}
if (value.Equals("北京第五小学"))
{
return "Red";
}
if (value.Equals("A5"))
{
return "Red";
}
else
{
return "Black";
}
}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}