Bug 54564 - Using the new OnPlatform mechanism in XAML returns an OnPlatform object and not the value assigned for each device
Summary: Using the new OnPlatform mechanism in XAML returns an OnPlatform object and n...
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.3.4
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: ---
Assignee: Stephane Delcroix
Depends on:
Reported: 2017-04-06 09:39 UTC by lanarchyste
Modified: 2017-04-18 12:01 UTC (History)
2 users (show)

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

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Description lanarchyste 2017-04-06 09:39:11 UTC
I use the new OnPlatform mechanism on a content page.
It is placed in the resources in the page to be accessible by several components.

Example :
<OnPlatform x:Key="DefaultDateTimeButtonColor" x:TypeArguments="x:String">
     <On Platform="iOS" Value="#1AB394" />
     <On Platform="Android" Value="#2196F3" />

I also tried with the following syntax:
<OnPlatform x:Key="DefaultDateTimeButtonColor" x:TypeArguments="x:String">
     <On Platform="iOS">#1AB394</On>
     <On Platform="Android">#2196F3</On>

Example of use in a binding :
{Binding IsRefreshing, Converter={StaticResource BoolToIconColorConverter}, ConverterParameter={StaticResource DefaultDateTimeButtonColor}}

But when I use it as a parameter in a value converter from a binding, the parameter in the converter class is OnPlatform, not the type defined in the XAML (which is in this example of type string)
Comment 2 Stephane Delcroix 2017-04-18 12:01:53 UTC
This is the expected behavior and hasn't change versus the "old" OmPlatform declaration.

You shouldn't worry about it at all as the `OnPlatform<string>` object your converter gets as `converterParameter` can be casted to a `string`, and has to be casted anyway for your converter code to compile.