Bug 60968 - UnHandledException throws while View has been customizing from Layout<View> and loaded inside StackLayout
Summary: UnHandledException throws while View has been customizing from Layout<View> a...
Status: CONFIRMED
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.4.0
Hardware: PC Windows
: Normal major
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2017-12-04 12:05 UTC by Ashok
Modified: 2018-03-22 10:05 UTC (History)
6 users (show)

Tags: exception, crash, uwp, layout, ac
Is this bug a regression?: ---
Last known good build:


Attachments
Sample (316.81 KB, application/x-zip-compressed)
2017-12-04 12:05 UTC, Ashok
Details
ScrollView issue (316.90 KB, application/x-zip-compressed)
2018-03-22 10:04 UTC, Ganesan VG
Details


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Related Links:
Status:
CONFIRMED

Description Ashok 2017-12-04 12:05:36 UTC
Created attachment 25897 [details]
Sample

I have created custom view derived from Layout<View> and loaded that view inside StackLayout but the application get crashed in Xamarin.Forms.UWP, same has been working in Xamarin.Forms.Android.

Run the attached sample in Xamarin.Forms.UWP,

You will get the exception details "Object reference not set to an instance of an object".
Comment 1 Paul DiPietro [MSFT] 2017-12-10 22:57:44 UTC
Thanks for the reproduction and will mark as confirmed until further investigation can be made into the cause.
Comment 2 Ganesan VG 2018-01-25 04:11:56 UTC
Similarly, if we load the custom view inside grid with row definition as Auto, the custom view is not loaded in iOS platform but if same is loaded with row definition as *, it loads as expected.

So, Could you please check with these too?

PS: The issue gets replicated in the same attachment sample. 

Replication Procedure:

Step 1: Open the sample and comment the StackLayout and load the CustomView in a grid with row definition as Auto.
Step 2: Run the application in iOS platform.

Issue : CustomView is not loaded.

Regards,
Dinesh B
Comment 3 Ganesan VG 2018-03-22 10:04:28 UTC
Created attachment 26224 [details]
ScrollView issue
Comment 4 Ganesan VG 2018-03-22 10:05:44 UTC
Hi ,

Same UnHandledException throws while View has been customizing from Layout<View> and loaded inside ScrollView. I have attached the sample , please check it.

Regards,
Ganesan