Longlistselector动态更新未绑定的项目

Question

I have a longlistselector which is binded to my class. In item template I've got textblock, that is not binded to any field in class.
Is there any way to iterate on list and fill that textblock with data?
Something like this:

foreach (var item in myList)
        {
            item.textblock = SomeMethod(item.field);
        }

Answer 1

            <phone:LongListSelector x:Name="Name" ItemsSource="{Binding MyCollection}" Margin="0,0,-12,0">
            <phone:LongListSelector.ItemTemplate>
                <DataTemplate>
                    <StackPanel Margin="0,0,0,17">
                        <TextBlock Text="{Binding PropertyTitle}" TextWrapping="NoWrap"
                                   Style="{StaticResource PhoneTextExtraLargeStyle}" />
                    </StackPanel>
                </DataTemplate>
            </phone:LongListSelector.ItemTemplate>
        </phone:LongListSelector>

Where PropertyTitle is the name of your property