Fix ObjectDisposedException in BitCarousel (#9821)#9823
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WalkthroughThis pull request adds a check to prevent actions on a disposed BitCarousel component. The Go method now verifies the component’s disposed state before proceeding, avoiding potential exceptions. Additionally, DisposeAsync is modified to set the disposed flag only once during cleanup. These changes improve error handling and maintain proper component lifecycle management. Changes
Sequence Diagram(s)sequenceDiagram
participant Caller
participant Carousel
Caller->>Carousel: Call Go()
alt Component disposed (_disposed == true)
Carousel-->>Caller: Exit early without action
else Component active (_disposed == false)
Carousel->>Carousel: Execute navigation logic
Carousel-->>Caller: Return normal response
end
sequenceDiagram
participant Caller
participant Carousel
Caller->>Carousel: Call DisposeAsync()
Carousel->>Carousel: Set _disposed flag to true
Carousel-->>Caller: Complete disposal process
Assessment against linked issues
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Actionable comments posted: 0
🧹 Nitpick comments (4)
src/BlazorUI/Bit.BlazorUI/Components/Lists/Carousel/BitCarousel.razor.cs (4)
287-287: Consider returning a boolean to indicate operation success.The disposal check is good, but callers might benefit from knowing if the operation was skipped. This helps with error handling and state management in the calling methods.
-private async Task Go(bool isNext = false, int scrollCount = 0) +private async Task<bool> Go(bool isNext = false, int scrollCount = 0) { - if (_disposed) return; + if (_disposed) return false; if (_othersIndices.Length == 0) return; // ... rest of the method ... + return true; }
446-446: Fix outdated comment referencing incorrect variable name.The comment refers to
_dotnetObjRefbut the variable is named_dotnetObj.- //_dotnetObjRef.Dispose(); // it is getting disposed in the following js call: + //_dotnetObj.Dispose(); // it is getting disposed in the following js call:
447-451: Consider handling all JS exceptions during cleanup.The code only handles JSDisconnectedException, but other JS exceptions could occur during cleanup.
try { await _js.BitObserversUnregisterResize(_Id, RootElement, _dotnetObj); } - catch (JSDisconnectedException) { } // we can ignore this exception here + catch (JSException) { } // we can ignore JS exceptions during cleanup
438-442: Enhance timer cleanup robustness.The timer cleanup could be more robust by stopping the timer before disposal and using a null-conditional operator.
if (_autoPlayTimer is not null) { + _autoPlayTimer.Stop(); _autoPlayTimer.Elapsed -= AutoPlayTimerElapsed; _autoPlayTimer.Dispose(); + _autoPlayTimer = null; }
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📒 Files selected for processing (1)
src/BlazorUI/Bit.BlazorUI/Components/Lists/Carousel/BitCarousel.razor.cs(2 hunks)
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- GitHub Check: build and test
3 participants
closes #9821
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