我一直试图为我的WPF列表框找到一个简单的DataTempleSelector,但我没有运气。我在SelectTemplate上设置了一个断点,它永远不会被调用。知道我在这里做错了吗?
C#:
public class ListBoxTemplateSelector : DataTemplateSelector
{
public DataTemplate DefaultnDataTemplate { get; set; }
public DataTemplate OverrideDataTemplate { get; set; }
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
string listboxItem = item as string;
if (listboxItem == "Apples" || listboxItem == "Oranges")
{
return OverrideDataTemplate;
}
return DefaultnDataTemplate;
}
}
XAML:
<Window.Resources>
<DataTemplate x:Key="DefaultDataTemplate">
<Grid Margin="4" MinHeight="25" Background="Blue"/>
</DataTemplate>
<DataTemplate x:Key="OverrideDataTemplate">
<Grid Margin="4" MinHeight="25" Background="Black"/>
</DataTemplate>
<converters:ListBoxTemplateSelector
x:Key="templateSelector"
DefaultnDataTemplate="{StaticResource DefaultDataTemplate}"
OverrideDataTemplate="{StaticResource OverrideDataTemplate}"/>
</Window.Resources>
<Grid>
<ListBox ItemTemplateSelector="{StaticResource templateSelector}">
<ListBox.Items>
<ListBoxItem Content="Apple"/>
<ListBoxItem Content="Banannas"/>
<ListBoxItem Content="Oranges"/>
<ListBoxItem Content="Lemons"/>
</ListBox.Items>
</ListBox>
</Grid>
答案 0 :(得分:1)
您已将ListBox
控件中的项目的用户界面硬编码为ListBoxItems
如果您想使用ItemTemplate
,则必须使用ItemsSource
的{{1}}属性,然后您的DataTemplate将应用于每个项目。
即
ListBox