c# - Handle Deserialization Exception in Formatter of Delegating Handler -


i'm using web api , implementing delegating handler.

i have customization of json serializer / deserializer registered formatter in api configuration.

    var globalformatters = globalconfiguration.configuration.formatters;     var jsonformatter = globalformatters.jsonformatter;     jsonformatter.serializersettings.formatting = newtonsoft.json.formatting.indented;     jsonformatter.serializersettings.converters.add(...)

as exception handling, i've added exceptionfilterattribute, , added filter in configuration.

public class methodattributeexceptionhandling : exceptionfilterattribute {     public override void onexception(httpactionexecutedcontext actionexecutedcontext)     {         var errorhandler = new errorhandler();          var response = errorhandler.processerror(actionexecutedcontext);          actionexecutedcontext.response = response;     } }

this seemed working well, until encountered deserialization exception, did not caught in filter.

i've read exception handling documentation here mentions serialization exception not caught filter (it not mention serialization however), , couldn't find solution catch , handle properly.

in case else,

in order deal issue implemented actionfilterattribute, in implementation of onactionexecuting i'm checking if model state invalid, , error handling stuff if so.

that's spot before action execution , after object deserialization.

public class validatemodelattribute : actionfilterattribute {     public override void onactionexecuting(httpactioncontext actioncontext)     {         if (actioncontext.modelstate.isvalid)         {             return;         }          //do error handling stuff...     } }

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