Bug 45727 - DataTemplate with x:Reference throws error when DataTemplate is in App.xaml
Summary: DataTemplate with x:Reference throws error when DataTemplate is in App.xaml
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.3.2
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2016-10-20 10:29 UTC by Andrei.N
Modified: 2017-01-24 15:07 UTC (History)
2 users (show)

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

Sample app (187.95 KB, application/x-zip-compressed)
2016-10-20 10:29 UTC, Andrei.N

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Description Andrei.N 2016-10-20 10:29:15 UTC
Created attachment 18131 [details]
Sample app

A DataTemplate with a x:Reference to a control throws exception when it's placed in App.xaml instead of the Page where the control exists:

System.Exception: Can't resolve name on Element

See MainPage.xaml, MainPage.xaml.cs and App.xaml in my sample, these are the only places where I added code.
Comment 1 Andrei.N 2016-10-20 10:38:16 UTC
This is preventing sharing DataTemplate's across Pages.
Comment 2 Andrei.N 2016-10-20 10:40:35 UTC
I don't see why would this work when DataTemplate is in a Page but not in App.xaml.
Comment 3 Stephane Delcroix 2017-01-24 15:07:12 UTC
"References an instance that is declared elsewhere in XAML markup" (from https://msdn.microsoft.com/en-us/library/ee795380(v=vs.110).aspx)

the scope fo x:Reference is roughly the xaml file in which it is used.

you probably can use a Binding to achieve your goal