dotnet 7, winforms, _get_columnCount is not implemented

[beqabeqa473]

Steps to reproduce:

• create a new winforms project;
• add a listview to a form;
  *Add multiple columns to a listview;
• Create a new item and add subItems.

Actual behavior:

NVDA cannot get information about existing columns

Expected behavior:

NVDA should be able to fetch information about columns. Narrator and jaws can do it.

NVDA logs, crash dumps and other attachments:

Traceback (most recent call last):
File "scriptHandler.pyc", line 295, in executeScript
File "globalCommands.pyc", line 1415, in script_navigatorObject_firstChild
File "baseObject.pyc", line 62, in get
File "baseObject.pyc", line 168, in _getPropertyViaCache
File "NVDAObjects\behaviors.pyc", line 825, in _get_firstChild
File "NVDAObjects\behaviors.pyc", line 820, in _makeCell
File "baseObject.pyc", line 62, in get
File "baseObject.pyc", line 168, in _getPropertyViaCache
File "NVDAObjects\behaviors.pyc", line 791, in _get_childCount
File "baseObject.pyc", line 62, in get
File "baseObject.pyc", line 168, in getPropertyViaCache
File "NVDAObjects\UIA_init.pyc", line 1917, in _get_columnCount
NotImplementedError

System configuration

NVDA installed/portable/running from source:

Installed

NVDA version:

alpha-28868,a198c9b5 (2023.3.0.28868)

Windows version:

Windows 10 22H2 (AMD64) build 19045.3208

Name and version of other software in use when reproducing the issue:

An app created using windows forms.

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

No

If NVDA add-ons are disabled, is your problem still occurring?

Yes

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

Yes

Additional information

I am attaching a sample project with prebuilt binaries
WinFormsApp1.zip

[ABuffEr]

Hi @beqabeqa473,
I tried for curiosity, as author of ColumnsReview.
Are you sure to have created the list correctly?
Because, investigating from NVDA console, I cannot see a list object, just listitems, and this sounds quite strange...

[beqabeqa473]

Yes, i created it correctly. It seems that marking whole winforms window as isGoodUIAWindow solves a problem.

…

On 8/12/23, Alberto Buffolino ***@***.***> wrote: Hi @beqabeqa473, I tried for curiosity, as author of ColumnsReview. Are you sure to have created the list correctly? Because, investigating from NVDA console, I cannot see a list object, just listitems, and this sounds quite strange... -- Reply to this email directly or view it on GitHub: #15283 (comment) You are receiving this because you were mentioned. Message ID: ***@***.***>

-- with best regards Beqa Gozalishvili Tell: +995593454005 Email: ***@***.*** Web: https://gozaltech.org Skype: beqabeqa473 Telegram: https://t.me/gozaltech facebook: https://facebook.com/gozaltech twitter: https://twitter.com/beqabeqa473 Instagram: https://instagram.com/beqa.gozalishvili

[beqabeqa473]

Further investigation showed that winforms incorrectly exposes listview for IAccessible, however i am not sure this is a bug from winforms team side.
The problem is that UIA implementation of ListItem in NVDA is incomplete and earlier it was simpler to include syslistview32 as a badUIA window and however WindowsForms.syslistview32 is beeing normalizedand passed as syslistview32 to the badUIA window comparison this is also beeing excluded.

The correct way to fix this should be to complement UIA ListItem and make it to behave like IAccessible one and remove definition from badUIA window list.
What do you think would be a correct solution?
CC @michaelDCurran @LeonarddeR I think you better know internals of UIA things of NVDA.

[LeonarddeR]

I'm pretty sure the Winforms listview has a native UIA implementation nowadays. I will look into this later this week.

[beqabeqa473]

It definitely has. I marked this window as good UIA window and it worked just great. The task is to decide how to correctly fix this on NVDA side. And UIA ListItem should be compemented to match behaviour of IA ListItem

…

On 8/14/23, Leonard de Ruijter ***@***.***> wrote: I'm pretty sure the Winforms listview has a native UIA implementation nowadays. I will look into this later this week. -- Reply to this email directly or view it on GitHub: #15283 (comment) You are receiving this because you were mentioned. Message ID: ***@***.***>

-- with best regards Beqa Gozalishvili Tell: +995593454005 Email: ***@***.*** Web: https://gozaltech.org Skype: beqabeqa473 Telegram: https://t.me/gozaltech facebook: https://facebook.com/gozaltech twitter: https://twitter.com/beqabeqa473 Instagram: https://instagram.com/beqa.gozalishvili