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  • Change Data template dynamically

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

    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

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  • 原文地址:https://www.cnblogs.com/itelite/p/4025611.html
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