dotnet/winforms

Cannot select correct item when there are consecutive null items in CheckedListBox and using Space Keyboard to check/uncheck

Open

#5,526 opened on Aug 25, 2021

View on GitHub
 (9 comments) (0 reactions) (1 assignee)C# (922 forks)batch import
:construction: work in progresshelp wanted

Repository metrics

Stars
 (4,100 stars)
PR merge metrics
 (Avg merge 14d 22h) (56 merged PRs in 30d)

Description

  • .NET Core Version: 6.0.100-rc.1.21417.19

  • Have you experienced this same bug with .NET Framework?: Yes, this issue occurs from .Net Framework 3.5 to 4.8.

More info:

  1. This issue also occurs in .Net 5.0&3.1&3.0.
  2. This issue cannot occurs when are no consecutive null items. image

Problem description: Cannot select correct item when using Space keyboard to check/uncheck null item. Actual

Expected behavior: Correct item should be selected when using Space keyboard to check/uncheck null item. Expected Minimal repro:

  1. Extract the attachment project CheckedListBoxNullItem.zip
  2. Build and run
  3. Hit Space keyboard on null item

Contributor guide

Research direction
Look into the CheckedListBox keyboard handling code, specifically the Space key event. Trace how the item index is determined when null items are involved and consecutive nulls cause incorrect selection. Likely a bug in the item index mapping logic.
Tech stack
csharp
Domain
desktop
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#WinForms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70