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Using IOverrideFilter to Override Custom ActionFilters

I want to use the IOverrideFilter interface to override my custom global filter, but it just doesn't work! The code is as follows:

 public sealed class MyGlobalFilterExceptionAttribute : FilterAttribute, IOverrideFilter { public Type FiltersToOverride { get { return typeof(ITest); } } }

My global filter implemented the ITest interface. I know that I can implement the task in my original global filter, but I would like to do it with IOverrideFilter .

Any idea ??

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The msdn information is not entirely clear, but IOverrideFilter.FiltersToOverride should be exactly one of the following

  • IActionFilter
  • IAuthorizationFilter
  • IAuthenticationFilter
  • IExceptionFilter

Basically, you cannot redefine certain filters, you can only redefine all filters of one of the above categories. See the ProcessOverrideFilters method in the source code .

So, let's say that your ITest filter is of type IActionFilter , then your redefinition will be (the same logic applies to any other category of filters):

 public Type FiltersToOverride { get { return typeof(IActionFilter); } }

You can also use the predefined OverrideActionFilters (and similar predefined override attributes for other filter categories).

For a smaller-scale redefinition, you may need to develop specific solutions like this one or write your own filter provider as in this very good article

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Source: https://habr.com/ru/post/988729/

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