microsoft / microsoft/microsoft-ui-xaml

RichEditBox doesn't work when typing over 9628 lines of texts

Open
#10,260 1 comment 0 reactions 0 assignees View on GitHub
bug needs-triage
Dominant language
C++
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Avg merge
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Merged PRs (30d)
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Description

### Describe the bug

RichEditBox doesn't work when typing over 9628 lines of texts.When you have over 9628 lines of text in the editbox.All the texts will show in line 9628;![Image](https://github.com/user-attachments/assets/8555585d-49d7-4c1c-a68f-be5c400be4e8)

### Steps to reproduce the bug

### Expected behavior

_No response_

### Screenshots

![Image](https://github.com/user-attachments/assets/8555585d-49d7-4c1c-a68f-be5c400be4e8)

### NuGet package version

None

### Windows version

_No response_

### Additional context

_No response_

Contributor guide

Open the contributing guide

Research direction

The issue provides a RichEditBox XAML reproduction and reports failure beyond 9,628 lines. Start by reproducing the behavior with more than 9,628 lines of text and investigate the RichEditBox control behavior while typing. Done means text no longer collapses onto line 9,628 and typing remains usable beyond that threshold.

Written by the indexing model from the issue text.

Assessment

Domain
desktop, frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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