Change Data template dynamically

1. Attached Property bound to task state. Any change will dynamically set data template.
2. Visual State Manager

A DataTemplateSelector does not respond to PropertyChange notifications, so it doesn't get re-evaluated when your properties change.

The alternative I use is DataTriggers that changes the Template based on a property.

For example, this will draw all TaskModel objects using a ContentControl, and the ContentControl.Template is based on the TaskStatus property of the TaskModel

<DataTemplate x:Key="OpenTaskTemplate" TargetType="{x:Type local:TaskModel}">

     <TextBlock Text="I'm an Open Task" />

</DataTemplate> 

<DataTemplate x:Key="ClosedTaskTemplate" TargetType="{x:Type local:TaskModel}">

     <TextBlock Text="I'm a Closed Task" />

 </DataTemplate>

<DataTemplate DataType="{x:Type local:TaskModel}">

     <ContentControl Content="{Binding }">

         <ContentControl.Style>

             <Style TargetType="{x:Type ContentControl}">

                 <!-- Default Template -->

                 <Setter Property="ContentTemplate" Value="{StaticResource OpenTaskTemplate}" />

                 <!-- Triggers to change Template -->

                 <Style.Triggers>

                     <DataTrigger Binding="{Binding TaskStatus}" Value="Closed">

                         <Setter Property="ContentTemplate" Value="{StaticResource ClosedTaskTemplate}" />

                     </DataTrigger>

                 </Style.Triggers>

             </Style>

         </ContentControl.Style>

     </ContentControl>

 </DataTemplate>

From: https://stackoverflow.com/questions/13136816/change-data-template-dynamically

巴特西

Change Data template dynamically

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