Xamarin.forms: [Bug] [UWP] Picker Height

[dannythomas13]

After updating from Xamarin 3 to 4 I noticed that the picker control (ends up as combobox) now has a height so small I can no longer see its contents or select from it. It works fine on iOS, has anyone else seen this issue?

[hartez]

@dannythomas13 When you say "3 to 4" - which version of 4?

If it's 4.3, then you might be experiencing the same thing as #8177/#8333/#8307, where the Picker simply ends up having no items in it. If that's the issue, you can expect a fix in the next service release for 4.3.

[dannythomas13]

Thanks @hartez I manually put some items in the xaml and now it at least opens but still a difference in height, I'm guessing the HeightRequest of 50 put a nice chunky box in v3 but no longer in v4, has anyone noticed this?

[dannythomas13]

Ok, so rolling back to v4.2 fixed BOTH issues...I'm now worried that I may bring in another issue that has been fixed since :(

[hartez]

Repro project:
_8439 Repro.zip

There's an extra space at the top of the Picker in 4.3, and that compresses the height of the actual combo box.

Notice the difference between 3.6:

And 4.3:

[joshminor]

The gap is caused by a new header content control that wasn't previously there.

This is breaking a lot of my layouts unfortunately.

Also to be clear, this was tested with 4.3 SR2

[Bosch-Eli-Black]

Looks like this has been fixed via #8150

[hartez]

I think @Bosch-Eli-Black is correct, this has been fixed. I'm closing this - if anyone is still running into it, tag me here and I'll reopen.