[Blazor] Support persisting component state on enhanced navigation #62824
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javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch 2 times, most recently from e634740 to 4bc47f9 Compare 
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Pull Request Overview
This PR implements "Enhanced Nav Agent Mode", adding support for advanced persistent state management in Blazor components with enhanced navigation capabilities. The changes introduce new restore behaviors, allow state updates during enhanced navigation, and improve component state handling across different rendering scenarios.
- New restore behaviors (SkipInitialValue, SkipLastSnapshot) for fine-grained control over when state is restored
- Enhanced navigation support with AllowUpdates property for dynamic state updates
- Improved state persistence management with context-aware restoration
- Test infrastructure enhancements including filtered state properties and non-persisted counters
Reviewed Changes
Copilot reviewed 60 out of 66 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
| Components/test/testassets/ | Added filtered state properties and non-persisted counter examples for testing |
| Components/test/E2ETest/ | Enhanced tests for state persistence with streaming and enhanced navigation |
| Components/WebAssembly/WebAssembly/ | Updated WebAssembly renderer to handle app state during component updates |
| Components/Server/ | Enhanced circuit management with restore context and state update handling |
| Components/Components/src/ | Core implementation of RestoreBehavior, RestoreContext, and enhanced state management |
src/Components/Components/src/PersistentState/PersistentValueProviderComponentSubscription.cs Outdated Show resolved Hide resolved
src/Components/Components/src/PersistentState/PersistentStateValueProviderKeyResolver.cs Outdated Show resolved Hide resolved
src/Components/Components/src/PersistentState/PersistentStateKeyResolver.cs Outdated Show resolved Hide resolved
javiercn commented Jul 21, 2025
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This type was just split off of PersistentStateValueProvider
javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch from e741f0b to 8cb2e7d Compare 3 tasks
ilonatommy approved these changes Jul 21, 2025
src/Components/Components/src/IPersistentComponentStateSerializer.cs Outdated Show resolved Hide resolved
src/Components/Components/src/PersistentState/PersistentValueProviderComponentSubscription.cs Outdated Show resolved Hide resolved
pavelsavara approved these changes Jul 21, 2025
javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch from a4b2290 to 14b1124 Compare 
| /backport to release/10.0-preview7 |
| Started backporting to release/10.0-preview7: https://github.com/dotnet/aspnetcore/actions/runs/16427035175 |
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javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch from 14b1124 to e19a454 Compare 
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| @javiercn any chance for merge? |
javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch from e19a454 to 2a9966d Compare javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch 2 times, most recently from 615d641 to 017df53 Compare 
* Adds support for ignoring persisted values during prerendering * Adds support for ignoring persisted values during resume * Adds support for receiving value updates during enhanced navigation Fixes #51584
javiercn force-pushed the javiercn/enhanced-nav-agent-mode branch from 017df53 to b51e028 Compare This was referenced Aug 4, 2025
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Fixes #51584, #62393, #62330, #62781
Detailed design can be found #51584 (comment)