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Asked: 2026-05-10T23:04:36+00:00

I have a tab page that should be hidden if a property (BlahType) is

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I have a tab page that should be hidden if a property (BlahType) is set to 1 and shown if set to 0. This is what I WANT to do:

<TabItem Header='Blah'>     <TabItem.Triggers>         <DataTrigger Binding='{Binding BlahType}' Value='0'>             <Setter Property='TabItem.Visibility' Value='Hidden' />         </DataTrigger>     </TabItem.Triggers> </TabItem>

The problem is, I get this error:

'Triggers collection members must be of type EventTrigger'

If you Google that error, you’ll see that Dr. WPF explains the error. Is there a clean way to do what I’m trying to achieve here?

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1 Answer

  1. I believe that the Triggers collection of a control only currently supports EventTriggers. If you would like to use a DataTrigger simply place it inside a style, for your example:

    <TabItem Header='Blah'>     <TabItem.Style>         <Style>             <Style.Triggers>                 <DataTrigger Binding='{Binding BlahType}' Value='0'>                     <Setter Property='TabItem.Visibility' Value='Hidden' />                 </DataTrigger>             </Style.Triggers>         </Style>     </TabItem.Style> </TabItem>
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