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Update filters.md (#10512)

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Rick Anderson 2019-01-20 11:27:09 -10:00 committed by GitHub
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aspnetcore/mvc/controllers/filters.md
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@ -272,7 +272,7 @@ The [short circuiting resource filter](#short-circuiting-resource-filter) shown
## Action filters
> [!IMPORTANT]
> Action filters do **not** apply to Razor Pages. Razor Pages supports [IPageFilter](/dotnet/api/microsoft.aspnetcore.mvc.filters.ipagefilter) and [IAsyncPageFilter](/dotnet/api/microsoft.aspnetcore.mvc.filters.iasyncpagefilter) . For more information, see [Filter methods for Razor Pages](xref:razor-pages/filter).
> Action filters do **not** apply to Razor Pages. Razor Pages supports <xref:Microsoft.AspNetCore.Mvc.Filters.IPageFilter> and <xref:Microsoft.AspNetCore.Mvc.Filters.IAsyncPageFilter> . For more information, see [Filter methods for Razor Pages](xref:razor-pages/filter).
*Action filters*:
@ -283,13 +283,13 @@ Here's a sample action filter:
[!code-csharp[](./filters/sample/src/FiltersSample/Filters/SampleActionFilter.cs?name=snippet_ActionFilter)]
The [ActionExecutingContext](/dotnet/api/microsoft.aspnetcore.mvc.filters.actionexecutingcontext) provides the following properties:
The <xref:Microsoft.AspNetCore.Mvc.Filters.ActionExecutingContext> provides the following properties:
* `ActionArguments` - lets you manipulate the inputs to the action.
* `Controller` - lets you manipulate the controller instance.
* `Result` - setting this short-circuits execution of the action method and subsequent action filters. Throwing an exception also prevents execution of the action method and subsequent filters, but is treated as a failure instead of a successful result.
The [ActionExecutedContext](/dotnet/api/microsoft.aspnetcore.mvc.filters.actionexecutedcontext) provides `Controller` and `Result` plus the following properties:
The <xref:Microsoft.AspNetCore.Mvc.Filters.ActionExecutedContext> provides `Controller` and `Result` plus the following properties:
* `Canceled` - will be true if the action execution was short-circuited by another filter.
* `Exception` - will be non-null if the action or a subsequent action filter threw an exception. Setting this property to null effectively 'handles' an exception, and `Result` will be executed as if it were returned from the action method normally.