Bug 3806 - ListView in VirtualMode produced events differently than MS .NET
Summary: ListView in VirtualMode produced events differently than MS .NET
Status: NEW
Alias: None
Product: Class Libraries
Classification: Mono
Component: Windows.Forms ()
Version: 2.10.x
Hardware: PC Linux
: Lowest normal
Target Milestone: Community
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2012-03-07 21:56 UTC by Seth Randall
Modified: 2017-09-01 11:56 UTC (History)
1 user (show)

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


Attachments
Test app (18.57 KB, application/zip)
2012-03-07 21:57 UTC, Seth Randall
Details
Mono output (486 bytes, text/plain)
2012-03-07 21:57 UTC, Seth Randall
Details
MS .NET output (400 bytes, text/plain)
2012-03-07 21:58 UTC, Seth Randall
Details


Notice (2018-05-24): bugzilla.xamarin.com is now in read-only mode.

Please join us on Visual Studio Developer Community and in the Xamarin and Mono organizations on GitHub to continue tracking issues. Bugzilla will remain available for reference in read-only mode. We will continue to work on open Bugzilla bugs, copy them to the new locations as needed for follow-up, and add the new items under Related Links.

Our sincere thanks to everyone who has contributed on this bug tracker over the years. Thanks also for your understanding as we make these adjustments and improvements for the future.


Please create a new report for Bug 3806 on GitHub or Developer Community if you have new information to add and do not yet see a matching new report.

If the latest results still closely match this report, you can use the original description:

  • Export the original title and description: GitHub Markdown or Developer Community HTML
  • Copy the title and description into the new report. Adjust them to be up-to-date if needed.
  • Add your new information.

In special cases on GitHub you might also want the comments: GitHub Markdown with public comments

Related Links:
Status:
NEW

Description Seth Randall 2012-03-07 21:56:30 UTC
When a ListView has VirtualMode set to true, the events produced by selecting one or more items are different in Mono than Microsoft's .NET.

When selecting a single item, Mono produces a VirtualItemsSelectionRangeChanged event with SelectedIndices.Count set to 1. MS .NET produces one with the Count set to 0.

When selecting 3 items, MS.NET produces a VirtualItemsSelectRangeChanged event with a 0 count, a SelectedIndexChanged with a 0 count and then a VirtualItemsSelectionRangeChanged event with a count of 3.

Mono doesn't produce the first Virtual event, does produce the SelectedIndexChanged event for a 0 count and then produces SelectedIndexChanged events for each successive count up to 3 and then the VirtualItemsSelectionRangeChanged event for the count of 3.

I've attached a zip file with a test project to demonstrate the issue as well as two text files to show what it does on Mono and Visual Studio.
Comment 1 Seth Randall 2012-03-07 21:57:30 UTC
Created attachment 1480 [details]
Test app
Comment 2 Seth Randall 2012-03-07 21:57:50 UTC
Created attachment 1481 [details]
Mono output
Comment 3 Seth Randall 2012-03-07 21:58:20 UTC
Created attachment 1482 [details]
MS .NET output