<ItemsControl ItemsSource="{Binding Numbers}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <!-- could use a WrapPanel if more appropriate for your scenario --> <StackPanel Orientation="Horizontal"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <TextBlock x:Name="commaTextBlock" Text=", "/> <TextBlock Text="{Binding .}"/> </StackPanel> <DataTemplate.Triggers> <DataTrigger Binding="{Binding RelativeSource={RelativeSource PreviousData}}" Value="{x:Null}"> <Setter Property="Visibility" TargetName="commaTextBlock" Value="Collapsed"/> </DataTrigger> </DataTemplate.Triggers> </DataTemplate> </ItemsControl.ItemTemplate></ItemsControl>我之所以提出您的问题，是因为我在Silverlight中寻找解决方案，该解决方案没有以前的数据相对来源。
