[英]How can I change listbox item's visibility property in wp7?
For example: there is a listbox: 例如:有一个列表框:
<ListBox Margin="24,107,12,28" Name="lb">
<TextBlock Text="Text" TextWrapping="Wrap" FontSize="22" Visibility="Collapsed" />
<TextBlock Text="Text2" TextWrapping="Wrap" FontSize="22" Visibility="Collapsed" />
<TextBlock Text="Text3" TextWrapping="Wrap" FontSize="22" Visibility="Collapsed" />
</ListBox>
How can I change TextBlocks's visibility properties programmatically? 如何以编程方式更改TextBlocks的可见性属性?
The ListBox
generates a container of type ListBoxItem
for each item. ListBox
为每个项目生成类型为ListBoxItem
的容器。 You can access it as follows: 您可以按以下方式访问它:
ListBoxItem lbi = lb.ItemContainerGenerator.ContainerFromIndex(0) as ListBoxItem
lbi.Visibility = Visibility.Collapsed;
If you want access to the TextBlock
you will need to navigate the visual tree of the ListBoxItem
. 如果要访问
TextBlock
,则需要导航ListBoxItem
的可视树。 For example, using Linq to VisualTree : 例如,使用Linq到VisualTree :
TextBlock txt = lbi.Descendants<TextBlock>().Single() as TextBlock;
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