blocks|key|3425145|text|顺便说一句，响应的序列化实际上发生在主机层(在HttpControllerHandler中，当托管在IIS中时，在HttpSelfhostServer中，当托管在SelfHost中时)，它位于堆栈的下方，而不是在响应从操作返回之后立即发生。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3425146|WebAPI+Stack发信人：http://www.asp.net/posters/web-api/ASP.NET-Web-API-Poster-grayscale.pdf|offset|length|3425147|这就是说，我不能想出一个直接的方法来实现这一点。这很麻烦，但可能会覆盖默认Xml和Json格式化程序的WriteToStreamAsync方法，并尝试捕获记录任何异常？|3425148|或者，您可以启用Web+API跟踪，这将记录序列化过程中发生的异常。但是，如果您不知道导致序列化错误的请求，那么您可能希望始终启用跟踪，我不确定您是否想要这样做。|3425149|entityMap|0|LINK|mutability|MUTABLE|url|http://www.asp.net/posters/web-api/ASP.NET-Web-API-Poster-grayscale.pdf^0|0|G|1Z|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

BTW, Serialization of responses actually happens at the host layers(in HttpControllerHandler, when hosted in IIS and in HttpSelfhostServer, when hosted in SelfHost) which is way below the stack and not immediately after the response is returned from an action.

WebAPI Stack Poster: <a href="http://www.asp.net/posters/web-api/ASP.NET-Web-API-Poster-grayscale.pdf" rel="nofollow">http://www.asp.net/posters/web-api/ASP.NET-Web-API-Poster-grayscale.pdf</a>

That said, I am not able to come up with a straight forward way to achieve this. This is cumbersome, but may be override the default Xml and Json formatter's WriteToStreamAsync methods and try-catch-log any exceptions?

Alternatively, you can enable Web API Tracing which would log the exceptions happening during serialization. But yeah, if you do not know for the requests which cause the serialization errors, then you might want to enable tracing all the time which i am not sure is something you might want to do.

blocks|key|1299521|text|如果不是返回一个对象，而是使用ApiController.CreateResponse()方法并返回一个HttpResponseMessage，那么您可以执行response.Content.LoadIntoBufferAsync().Wait()，这将强制序列化在您仍在操作中时发生，因此可以捕获异常。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1299522|entityMap^0|F|U|1G|J|27|19|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

If, instead of returning an object, you use the <code>ApiController.CreateResponse()</code> method and return a <code>HttpResponseMessage</code> you can then do <code>response.Content.LoadIntoBufferAsync().Wait()</code> and that will force the serialization to happen whilst you are still in the action and therefore can catch the exception.

blocks|key|333312|text|您可以通过注册IExceptionHandler的实现来捕获所有Web+API异常。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|333313|请参阅Web+API+Global+Error+Handling|333314|333315|+...there是许多异常过滤器无法处理的情况。例如：|blockquote|333316|333317|333318|从控制器constructors.|333319|Exceptions引发的|unordered-list-item|333320|
|333321|异常从响应内容序列化过程中引发的routing.|333322|333323|Exceptions期间引发的消息handlers.|333324|333325|Exceptions引发。|333326|333327|在那篇文章中没有提到的一件事是，您的IExceptionHandler必须通过GlobalConfiguration.Configuration.Services.Add(...)或通过配置为供DependencyResolver使用的IoC容器进行注册。|333328|entityMap|0|LINK|mutability|MUTABLE|url|http://www.asp.net/web-api/overview/web-api-routing-and-actions/web-api-global-error-handling^0|7|H|0|3|T|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|I|H|13|1F|2P|I|0^^$0|@$1|2|3|4|5|6|7|1D|8|@$9|1E|A|1F|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1G|8|@]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|H|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|1L|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1O|8|@]|D|@]|E|$]]|$1|P|3|Q|5|R|7|1P|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|U|3|V|5|R|7|1R|8|@]|D|@]|E|$]]|$1|W|3|T|5|6|7|1S|8|@]|D|@]|E|$]]|$1|X|3|Y|5|R|7|1T|8|@]|D|@]|E|$]]|$1|Z|3|T|5|6|7|1U|8|@]|D|@]|E|$]]|$1|10|3|11|5|R|7|1V|8|@]|D|@]|E|$]]|$1|12|3|-4|5|6|7|1W|8|@]|D|@]|E|$]]|$1|13|3|14|5|6|7|1X|8|@$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]|$9|22|A|23|B|C]]|D|@]|E|$]]|$1|15|3|-4|5|6|7|24|8|@]|D|@]|E|$]]]|16|$17|$5|18|19|1A|E|$1B|1C]]]]

You can catch all Web API exceptions by registering an implementation of <code>IExceptionHandler</code>.
See <a href="http://www.asp.net/web-api/overview/web-api-routing-and-actions/web-api-global-error-handling" rel="nofollow noreferrer">Web API Global Error Handling</a>
<blockquote>
...there are a number of cases that exception filters can’t handle. For example:
<ul>
<li>Exceptions thrown from controller constructors.</li>
<li>Exceptions thrown from message handlers.</li>
<li>Exceptions thrown during routing.</li>
<li>Exceptions thrown during response content serialization .</li>
</ul>
</blockquote>
One thing not mentioned in that article is that your <code>IExceptionHandler</code> must be registered, either by <code>GlobalConfiguration.Configuration.Services.Add(...)</code> or via an IoC container configured to be used by <code>DependencyResolver</code>.

I have an ASP.NET Web API web service which throws a SerializationException in certain circumstances. The problem is that I'm unable to trap and log this exception server-side -- the only place it shows up is in the body of the HTTP response to the client.

I registered an <code>ExceptionFilterAttribute</code> as described in <a href="http://www.asp.net/web-api/overview/web-api-routing-and-actions/exception-handling" rel="noreferrer">Exception Handling in ASP.NET Web API</a> and verified that it works properly when I throw an exception within my controller. Unfortunately the SerializationException is being thrown during the response (after the controller) and appears to be completely swallowed up by ASP.NET. I also tried hooking <code>Application_Error()</code> in Global.asax.cs but it didn't show up there either.

How can I catch SerializationException exceptions during the Web API response?

How do I trap a SerializationException in Web API?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个在某些情况下抛出SerializationException的ASP.NET Web API web服务。问题是我无法在服务器端捕获和记录这个异常--它唯一出现的地方是客户端的HTTP响应的主体中。我按照中的描述注册了一个ExceptionFilterAttribute，并验证了当我在控制器中抛出异常时，它是否...

问如何在Web API中捕获SerializationException？
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问如何在Web API中捕获SerializationException？EN