[Accessibility] Narrator cannot announce Expand/Collapse state for properties with multiline textbox typeeditor drop-down

[MelonWang1]

.NET Core Version:

• Main: 7.0.100-preview.2.22108.9
• Release: 7.0.100-preview.1.22108.11

Have you experienced this same bug with .NET Framework?

Yes

Problem description:

Narrator doesn't announce the expanded state when pressing F4 or 'Alt + down' for such properties which drop-down control is RichEdit control after expanded them. In this case, now Narrator focus in the drop-down list: RichEdit instead of this entire property: 'Text' as following screenshot:

And check the related properties in Inspect, the ExpandCollapse.ExpandCollapseState exists and displays Expand state --- It's correct.

Expected behavior:

Narrator should announce the expanded state.

Minimal repro:

1. Create a winforms core app with PropertyGrid and Button control
2. Associate the Button with PropertyGrid as a selected object
3. Build and run the core project
4. Start Narrator tool
5. Press F4 to open the RichEdit control of Text property

More info:

1. This issue cannot repro from 7.0.100-alpha.1.21566.20 to 7.0.100-alpha.1.21568.2.
2. This has been fixed and added comment in #3672.

[Tanya-Solyanik]

@MelonWang1 - does the same issue reproduce in JAWS and NVDA?

[MelonWang1]

@Tanya-Solyanik For JAWS, it is locked out, hitting known issue 6704.
For NVDA, it reproduces the issue, see screenshot:

[MandiMan]

Verified on .NET 7.0 test pass build: .NET 7.0.100-rc.1.22425.12, issue was fixed as below:

[MandiMan]

Verified on .NET 8.0 latest build from main branch: NET 8.0.100-alpha.1.22451.15, issue was fixed, test result is same as above screenshot.