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Cross-link sync context content (#29764)

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Luke Latham 2023-07-11 07:05:19 -04:00 committed by GitHub
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8
aspnetcore/blazor/components/rendering.md
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@ -142,25 +142,25 @@ Because the callback is invoked outside of Blazor's synchronization context, the
::: moniker range=">= aspnetcore-7.0"
:::code language="razor" source="~/../blazor-samples/7.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="26":::
:::code language="razor" source="~/../blazor-samples/7.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="23-27":::
::: moniker-end
::: moniker range=">= aspnetcore-6.0 < aspnetcore-7.0"
:::code language="razor" source="~/../blazor-samples/6.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="26":::
:::code language="razor" source="~/../blazor-samples/6.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="23-27":::
::: moniker-end
::: moniker range=">= aspnetcore-5.0 < aspnetcore-6.0"
:::code language="razor" source="~/../blazor-samples/5.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="26":::
:::code language="razor" source="~/../blazor-samples/5.0/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="23-27":::
::: moniker-end
::: moniker range="< aspnetcore-5.0"
:::code language="razor" source="~/../blazor-samples/3.1/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="26":::
:::code language="razor" source="~/../blazor-samples/3.1/BlazorSample_WebAssembly/Pages/rendering/CounterState2.razor" highlight="23-27":::
::: moniker-end

10
aspnetcore/blazor/state-management.md
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@ -652,6 +652,16 @@ When implementing custom state storage, a useful approach is to adopt [cascading
For additional discussion and example approaches, see [Blazor: In-memory state container as cascading parameter (dotnet/AspNetCore.Docs #27296)](https://github.com/dotnet/AspNetCore.Docs/issues/27296).
## Troubleshoot
In a custom state management service, a callback invoked outside of Blazor's synchronization context must wrap the logic of the callback in <xref:Microsoft.AspNetCore.Components.ComponentBase.InvokeAsync%2A?displayProperty=nameWithType> to move it onto the renderer's synchronization context.
When the state management service doesn't call <xref:Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged%2A> on Blazor's synchronization context, the following error is thrown:
> :::no-loc text="System.InvalidOperationException: 'The current thread is not associated with the Dispatcher. Use InvokeAsync() to switch execution to the Dispatcher when triggering rendering or component state.'":::
For more information and an example of how to address this error, see <xref:blazor/components/rendering#receiving-a-call-from-something-external-to-the-blazor-rendering-and-event-handling-system>.
## Additional resources
* [Save app state before an authentication operation](xref:blazor/security/webassembly/additional-scenarios#save-app-state-before-an-authentication-operation)