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

ObservableCollection<ViewModelClass> m_allProjects; 

Then I have this in my view:

<DataTemplate>    <views:ProjectInfoView x:Key="ProjectInfoDetailTemplate"/> </DataTemplate>  <ItemsControl Grid.Row="1" Grid.Column="0"               ItemsSource="{Binding AllProjects}"               ItemTemplate="{StaticResource ProjectInfoDetailTemplate}"               Margin="10,28.977,10,10"> </ItemsControl > 

I want, based on the boolean in the AllProjects-collection, to use a different datatemplate. What is the best way to do this?

I know I can do this with different ViewModels and use a kind of ViewModel-base object, but I prefer just to use 1 view model.

EDIT:

I want to do this with data triggers. Can someone provide me with some code please?

Answer 1

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.