Bug 49820 - Bug in Tab control
Summary: Bug in Tab control
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: unspecified
Hardware: PC Linux
: --- normal
Target Milestone: ---
Assignee: Paul DiPietro [MSFT]
Depends on:
Reported: 2016-12-13 14:45 UTC by Carles
Modified: 2017-06-19 19:10 UTC (History)
3 users (show)

Tags: tab control, forms
Is this bug a regression?: ---
Last known good build:

Test project (294.47 KB, application/x-gzip)
2017-01-09 15:15 UTC, Carles

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Description Carles 2016-12-13 14:45:27 UTC

I've just noticed a bug in the TabControl.
I've an empty control created in design time to which I'm adding pages programmatically.
Once I add the first page using this:

this.myTabControl.TabPages.Add("my title");

I get an exception: "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index."

This message is got by my try-catch structure. I've no image list associated, no SelectedItem and this is the very first tab added.

in the form, I'm being asked for the version, but I don't know if you refer to the version of Mono, libmono, XamarinForms, etc. As a reference I'm using Linux Mint 32bit 14.04 trusty (Ubuntu 14.04.5 LTS) and I've just performed "apt-get update" + "apt-get upgrade".

Let me know if you would need any additional information.

Best regards,
Comment 1 Paul DiPietro [MSFT] 2016-12-30 16:56:13 UTC
Could you please upload a reproduction project? The version refers to the version of Forms being used.
Comment 2 Carles 2017-01-09 15:15:18 UTC
Created attachment 19130 [details]
Test project

Here is a demo project where the error appears. It has been generated from a trimmed version of a much bigger project.
Comment 3 Carles 2017-02-06 15:24:02 UTC
Any new on this?
Was anybody able to reproduce the error with the attached demo project?
Comment 4 Paul DiPietro [MSFT] 2017-06-19 19:10:38 UTC
This is a WinForms issue, not Xamarin.Forms.