Bug 5595 - ComboBox doesn't update SelectedIndex if an item before the selection is removed
Summary: ComboBox doesn't update SelectedIndex if an item before the selection is removed
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: master
Hardware: PC Linux
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-06-09 14:20 UTC by Steve
Modified: 2012-06-21 19:47 UTC (History)
2 users (show)

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

C# project that demonstrates the problem (3.68 KB, application/zip)
2012-06-09 14:20 UTC, Steve
Patch to fix problem (926 bytes, patch)
2012-06-09 14:22 UTC, Steve

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Description Steve 2012-06-09 14:20:22 UTC
Created attachment 2036 [details]
C# project that demonstrates the problem

If a ComboBox has a SelectedIndex, and an item before that index gets removed, the selected index doesn't get updated.  .NET will decrement the index to compensate.

The enclosed project demonstrates the problem.  It also shows that, if the last item in a combo box is selected, and a prior item gets deleted, and the combo box gets shown, mono-winforms throws an exception.
Comment 1 Steve 2012-06-09 14:22:23 UTC
Created attachment 2037 [details]
Patch to fix problem

This is my proposed patch, so that no exception is thrown and mono-winforms mimics .NET functionality.  The patch is under review on the mono-devel mailing list.
Comment 2 Thomas Goldstein 2012-06-09 15:40:59 UTC
The patch has been pushed (commit ecd410269466799c8bde71fc55ea9bf2a052c364). Thanks.