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POWPF: Dynamically change ListBox's ItemTemplate based on ListBox Items Size
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2010-08-03T00:07:49.660
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2011-01-18T11:18:21.380
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<p>I need to change the DataTemplate of my ListBox, based on the ListBox items count. I have come up with the following XAML:</p> <pre><code><Window.Resources> <DataTemplate x:Key="DefaultTemplate"> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Path=Text}"/> <TextBlock Text="default template" /> </StackPanel> </DataTemplate> <DataTemplate x:Key="OtherTemplate"> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Path=Text}"/> <TextBlock Text="other template" /> </StackPanel> </DataTemplate> </Window.Resources> <ListBox Name="listBox1" ItemsSource="{Binding Path=Items}"> <ListBox.Style> <Style TargetType="{x:Type ListBox}"> <Setter Property="ItemTemplate" Value="{StaticResource DefaultTemplate}" /> <Style.Triggers> <DataTrigger Binding="{Binding Path=Items.Count}" Value="1"> <Setter Property="ItemTemplate" Value="{StaticResource OtherTemplate}"/> </DataTrigger> </Style.Triggers> </Style> </ListBox.Style> </ListBox> </code></pre> <p>With the above XAML, once I added two or more items to the bound list, the data template changed as expected (from other to default). However, if I remove the first item in the list with more than two items, the entire listbox just becomes empty (I verified that the bound list is non-empty). Removing the second item in a two items list works fine though (i.e. template changed from default to other).</p> <p>Any ideas why this is happening? Or perhaps I went about the wrong way to solve this problem?</p>
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<wpf><listbox><datatemplate><listboxitem>
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WPF: Dynamically change ListBox's ItemTemplate based on ListBox Items Size
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