Document IExceptionHandler #29674
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Document IExceptionHandler #29674
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@Kahbazi please review. |
gfoidl
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...etcore/fundamentals/error-handling/samples/8.x/ErrorHandlingSample/CustomExceptionHandler.cs
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Co-authored-by: Günther Foidl <gue@korporal.at>
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| [IExceptionHandler](https://source.dot.net/#Microsoft.AspNetCore.Diagnostics/ExceptionHandler/IExceptionHandler.cs,adae2915ad0c6dc5) is an interface that gives the developer a callback for handling known exceptions in a central location. | ||
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| `IExceptionHandler` implementations are registered by calling [`IServiceCollection.AddExceptionHandler<T>`](https://source.dot.net/#Microsoft.AspNetCore.Diagnostics/ExceptionHandler/ExceptionHandlerServiceCollectionExtensions.cs,e74aac24e3e2cbc9). Multiple implementations can be added, and they're called in the order registered. If an exception handler handles a request, it can return `true` to stop processing. If an exception isn't handled by any exception handler, then control falls back to the default behavior and options from the middleware. Different metrics and logs are emitted for handled versus unhandled exceptions. |
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Might be useful to mention that IExceptionHandlers lifetime is singleton.
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Co-authored-by: Günther Foidl <gue@korporal.at>
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Fixes #29520
Best location for the new H2 section seems to be after the sections on Developer exception page and Exception handler page, and before the UseStatusCodePages section.
Internal review URL (goes to .NET 8 version and the new section)
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