MicrosoftEdge / MicrosoftEdge/WebView2Feedback
[Problem/Bug]: Webview2CompositionControl throws NRE on load in Outlook COM add-in
Nobody has claimed this yet.
- Dominant language
- PowerShell
- Stars
- 526
- Forks
- 67
- PR merge metrics
- No merged PRs in 30d
Description
What happened?
I want to use a Webview2CompositionControl in WPF element in an Outlook COM add-in
When the control is loaded, the on_loaded method throws a NullReferenceException.
This seems to originate to the point where the on_loaded method calls Window.getWindow(this).LocationChanged += WebView2CompositionControl_LocationChanged; triggered byEnsureCoreWebView2Async(), but Window.getWindow(this) returns null.
Importance
Important. My app's user experience is significantly compromised.
Runtime Channel
Stable release (WebView2 Runtime)
Runtime Version
No response
SDK Version
No response
Framework
WPF
Operating System
Windows 11
OS Version
No response
Repro steps
instantiate a Webview2CompositionControl in an Explorer or Inspector window in Outlook
Repros in Edge Browser
No, issue does not reproduce in the corresponding Edge version
Regression
No, this never worked
Last working version (if regression)
No response
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing WebView2CompositionControl's on_loaded path and the EnsureCoreWebView2Async call described in the report, focusing on the Window.getWindow(this).LocationChanged access. Reproduce the control in an Outlook Explorer or Inspector window and verify that loading completes without a NullReferenceException.
Written by the indexing model from the issue text.
Assessment
- Domain
- desktop
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100