Bug 60209 - A Property resets to default when multiple Triggers setting it to the same value
Summary: A Property resets to default when multiple Triggers setting it to the same value
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.4.0
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-10-16 15:11 UTC by Daniel Katz
Modified: 2017-12-18 14:57 UTC (History)
2 users (show)

Tags: ac
Is this bug a regression?: ---
Last known good build:

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Description Daniel Katz 2017-10-16 15:11:07 UTC
When two Triggers setting a property to the same (non-default) value on different conditions, after the handoff between the last and the first, the actual value resets to default.

For example:

<Label Text="Defaults in two clicks" 


        <DataTrigger TargetType="Label" Binding="{Binding Source={x:Reference me}, Path=FlipFlop}" Value="False">
                <Setter Property="TextColor" Value="Red" />

        <DataTrigger TargetType="Label" Binding="{Binding Source={x:Reference me}, Path=FlipFlop}" Value="True">
                <Setter Property="TextColor" Value="Red" />


<Button Clicked="FlipTheFlop" Text="Click" />

private void FlipTheFlop(object sender, EventArgs e)
    FlipFlop = !FlipFlop;

A full reproduction available in the following repo https://github.com/mmcubit/SameValueTriggerBugRepro
Comment 1 Paul DiPietro [MSFT] 2017-12-18 14:57:21 UTC
Moved to https://github.com/xamarin/Xamarin.Forms/issues/1412