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MVVM Friendly DataTemplate switching

, 29 Jul 2013 CPOL
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Switching data templates entirely in XAML.
I frequently have a need to switch templates inside listviews. Now, while you could create your own ItemTemplateSelector to choose templates, this just smacks to me of having to add more code to your application than really should be necessary. It would be great if you could do this entirely in XAML.
 
Well, thanks to the great Dr WPF for suggesting it, there is and it's a really simple trick. What you need to do is have your DataTemplate just wrap a Control, and swap in ControlTemplates as necessary.
<DataTemplate x:Key="MyItemTemplate">
  <Control x:Name="myControl" Template="{StaticResource MyMainTemplate}" />
  <DataTemplate.Triggers>
    <DataTrigger Binding="{Binding IsActive}" Value="True">
      <Setter TargetName="myControl" Property="Template" Value="{StaticResource MyOtherTemplate}" />
    </DataTrigger>
  </DataTemplate.Triggers>
</DataTemplate>
Now all you need do is add the templates as ControlTemplates instead of DataTemplates and point your listview at this DataTemplate.
 
As you can see, the coding is all done in your XAML and, through the judicious use of data triggers, you can have swappable templates. You've gotta love it.

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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Pete O'Hanlon
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A developer for over 30 years, I've been lucky enough to write articles and applications for Code Project as well as the Intel Ultimate Coder - Going Perceptual challenge. I live in the North East of England with 2 wonderful daughters and a wonderful wife.
 
I am not the Stig, but I do wish I had Lotus Tuned Suspension.
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Comments and Discussions

 
QuestionGood stuff question re: the bindings Pinmembermwpowellhtx18-Dec-14 11:00 
AnswerRe: Good stuff question re: the bindings PinprotectorPete O'Hanlon18-Dec-14 11:33 
QuestionThanks a lot for this example - I found two typos PinmemberRufus Buschart6-Jan-13 7:50 
AnswerRe: Thanks a lot for this example - I found two typos PinprotectorPete O'Hanlon29-Jul-13 7:16 
Rufus, thanks for catching the typos. I apologise for the length of time it's taken to update the article, but I didn't receive a notification for some reason. So, have yourself a brand spanking new 5 in way of compensation.
I was brought up to respect my elders. I don't respect many people nowadays.

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GeneralReason for my vote of 5 cool PinmemberDaniel Vaughan20-Jun-11 12:21 
GeneralRe: I like it mate. The thing I love about XAML is that there ar... PinprotectorPete O'Hanlon23-Jun-11 8:36 
GeneralReason for my vote of 5 nice PinmemberMonjurul Habib14-Jun-11 12:13 

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