WP7 Using binding how can I manage data relevant on prior items - data-binding

Question

When I am binding to a collection with a listbox, is there any way I can manage the output based upon the prior items that were displayed in the collection.
For example in the following binding
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ListBox x:Name="AgendaListbox"
ItemsSource="{Binding AgendaItems2}"
ItemTemplate="{StaticResource EventDisplay3}"/>
</Grid>
Where the Template is as follows
<DataTemplate x:Key="EventDisplay3">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition Height="50"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="10"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding DateTimeDayString}" Style="{StaticResource PhoneTextSmallStyle}"
Grid.Row="0" Grid.Column="0"/>
<TextBlock Text="{Binding DisplayTimeString}" Foreground="{Binding DisplayColor}"
Grid.Row="1" Grid.Column="0" Style="{StaticResource PhoneTextLargeStyle}"/>
<TextBlock Text="{Binding Details}" TextWrapping="Wrap" Style="{StaticResource PhoneTextNormalStyle}"
Grid.Row="0" FontSize="30" Grid.Column="2" Grid.RowSpan="3"
VerticalAlignment="Center" />
<TextBlock Text="{Binding Location}" Style="{StaticResource PhoneTextSmallStyle}"
Grid.Row="3" Grid.Column="0"/>
</Grid>
</DataTemplate>
If I want to alter the display based upon they previous item that was displayed (e.g say I want to drop the DateTimeString Binding if its identical to the previous one) is there a way that I can do it without having to make specific allowance for it when I build up the collecton.
Because so much happens automatically as it were with the listbox being bound to that collection I cannot see any other way without me handling this as the collection is being built... because after that I have little control.
Thanks

Answer 1

Is there any way I can manage the output based upon the prior items that were displayed in the collection?
No.
You have to do such changes when you build the collection. Consider if using a DataTemplateSelector can be of any help.