Bug 60767 - Setting Grid RowDefinition.Height to DynamicResource doesn't work
Summary: Setting Grid RowDefinition.Height to DynamicResource doesn't work
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.5.0
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-11-20 12:03 UTC by Dominik Weber
Modified: 2017-11-20 20:02 UTC (History)
2 users (show)

Tags: grid, rowdefinition, dynamicresource, ac
Is this bug a regression?: ---
Last known good build:

test project (302.70 KB, application/x-zip-compressed)
2017-11-20 12:03 UTC, Dominik Weber

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Description Dominik Weber 2017-11-20 12:03:12 UTC
Created attachment 25759 [details]
test project

When setting RowDefinition.Height to {DynamicResource MyResource} using XAML the height setting seems to be ignored.
Using StaticResource instead of DynamicResource works fine, however without dynamic changes. I have also tried using a Binding to specify RowDefinition.Height which does work and also accounts for dynamic changes.

-- App.xaml ----------------------------
      <GridLength x:Key="MySize">100</GridLength>

-- MainPage.xaml -----------------------

          <RowDefinition Height="{StaticResource MySize}" />
        <Label BackgroundColor="LightBlue" Text="StaticResource" />

          <RowDefinition Height="{DynamicResource MySize}" />
        <Label BackgroundColor="LightSalmon" Text="DynamicResource" />

          <RowDefinition Height="{Binding MySize}" />
        <Label BackgroundColor="LightYellow" Text="Binding" />


Expected behavior: All labels initially are 100px in height (MySize property contains the same value as the MySize resource). When the MySize resource (and property) is changed the 2nd and 3rd label should change their size.

Actual behavior: Only the StaticResource and Binding labels are 100px initially, the DynamicResource label is autosized to fit its text. When the MySize resource and property are changed, only the 3rd label using data binding is updated.

Test project attached.
Comment 1 Paul DiPietro [MSFT] 2017-11-20 20:02:53 UTC
Will set to confirmed until further investigation can be made to determine if this is expected or not.