Different views / data template based on member variable

Question

I have a view model called

 ViewModelClass 

which contains a boolean.

I have another view model which contains

Observab         


        

Answer 1

if you want to switch your itemscontrol item view in case of the ViewModelClass boolean, then you can simply use a datatrigger style in your ProjectInfoView usercontrol.

Answer 2

I usually use a ContentControl to display the data, and swap out the ContentTemplate in a trigger based on the property that changes.

Here's an example I have posted on my blog that swaps a template based on a bound property

<DataTemplate x:Key="PersonTemplate" DataType="{x:Type local:ConsumerViewModel}">
     <TextBlock Text="I'm a Person" />
</DataTemplate> 

<DataTemplate x:Key="BusinessTemplate" DataType="{x:Type local:ConsumerViewModel}">
     <TextBlock Text="I'm a Business" />
 </DataTemplate>

<DataTemplate DataType="{x:Type local:ConsumerViewModel}">
     <ContentControl Content="{Binding }">
         <ContentControl.Style>
             <Style TargetType="{x:Type ContentControl}">
                 <Setter Property="ContentTemplate" Value="{StaticResource PersonTemplate}" />
                 <Style.Triggers>
                     <DataTrigger Binding="{Binding ConsumerType}" Value="Business">
                         <Setter Property="ContentTemplate" Value="{StaticResource BusinessTemplate}" />
                     </DataTrigger>
                 </Style.Triggers>
             </Style>
         </ContentControl.Style>
     </ContentControl>
 </DataTemplate>

A DataTemplateSelector will also work, but only if the property that determines which template to show doesn't change since DataTemplateSelectors don't respond to change notifications. I usually avoid them if possible since I also prefer my view selection logic in my view so I can see whats going on.