Xamarin.forms: Exception at Xamarin.Forms.Platform.UWP.SearchBarRenderer.OnControlLoaded after upgrading to 3.0

[luis-barreira]

After upgrading my solution to Xamarin Forms 3.0.0.446417 every time I try to open a page that contains a SearchBar control on a UWP application I get an exception.

I'm using the latest version of Visual Studio (15.7.0) and compiling using UWP SDK 16299.

The exception I get is:

System.NullReferenceException: Object reference not set to an instance of an object.
at Xamarin.Forms.Platform.UWP.SearchBarRenderer.OnControlLoaded(Object sender, RoutedEventArgs routedEventArgs)

[jonilviv]

I have same problems. Rollback to "Xamarin.Forms" Version="2.5.1.527436" helps me. MS VS 2017 (15.6.7) UWP 10.0 (16299-17134)

[EmilAlipiev]

Same here. too bad we need to rollback now. I really liked 3.0 with new features. can there be quick solution please?

[EmilAlipiev]

I have just tested again and it looks like that it throws when the page is loaded but if you handle the exception, searchbar is still working. strange behavior

[StephaneDelcroix]

could one of you please attach a small reproduction project. thx

[luis-barreira]

SearchBarTest.zip
Apparently the exception only occurs if the SearchBar is hidden. If the SearchBar is initially visible then there is no exception. I've created a small project that demonstrates this behavior.

[EmilAlipiev]

I think that it has nothing with visible or hidden because my searchbar is visible but i still get this error.

[tseemann-xematec]

I can confirm that the exception occurs regardless of whether the SearchBar is visible or not
[Update] Correction; In my case the SearchBar was actually not visible (IsVisible = false) when loading the page, which seems to be the cause of the exception.

[aherrick]

Happening here as well. Tried upgrading to 3.1 pre but that had other issues. Rolling back.

[linnkrb]

Also here....

[StephaneDelcroix]

I suspect the NRE is thrown here https://github.com/xamarin/Xamarin.Forms/blob/master/Xamarin.Forms.Platform.UAP/SearchBarRenderer.cs#L99

/cc @hartez

[tseemann-xematec]

@StephaneDelcroix when will we see this fix in a prerelease or stable build?

[StephaneDelcroix]

@tseemann-xematec in the next service-release

[tseemann-xematec]

@StephaneDelcroix do you know of a schedule date for the next service release?

[activa]

An urgent hotfix for this issue is badly needed because it's a true blocker. Right now, every Xamarin.Forms app that uses a search bar will crash on UWP and there's no workaround for it.

[linnkrb]

Is this out there somewhere ? I´ve updated to latest pre, but I still have trouble

[rmarinho]

@linnkrb it should be in the latest pre and stable, can you add a repo with 3.0.0 so we can take a look.

[linnkrb]

Tried the lates pre and lates stable, but makes my UWP crash, so rolling back…

Fra: Rui Marinho [e-mail]
Svar til: "xamarin/Xamarin.Forms" [e-mail]
Dato: tirsdag 5. juni 2018 17:58
Til: "xamarin/Xamarin.Forms" [e-mail]
Kopi: Linn Kristin Bjørkli [e-mail], Mention [e-mail]
Emne: Re: [xamarin/Xamarin.Forms] Exception at Xamarin.Forms.Platform.UWP.SearchBarRenderer.OnControlLoaded after upgrading to 3.0 (#2633)

@linnkrbhttps://github.com/linnkrb it should be in the latest pre and stable, can you add a repo with 3.0.0 so we can take a look.

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHubhttps://github.com/xamarin/Xamarin.Forms/issues/2633#issuecomment-394764587, or mute the threadhttps://github.com/notifications/unsubscribe-auth/AIxZSiZtT0z1gPGM2C7tS4zPnCC0AnHHks5t5qq0gaJpZM4T28jw.