blocks|key|1739680|text|有一个您可以访问的WebOperationContext，它有一个OutgoingWebResponseContext类型的OutgoingResponse属性，该属性有一个可以设置的StatusCode属性。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1739681|WebOperationContext+ctx+=+WebOperationContext.Current;
ctx.OutgoingResponse.StatusCode+=+System.Net.HttpStatusCode.OK;|code-block|syntax|javascript|1739682|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.servicemodel.web.weboperationcontext.aspx|1|http://msdn.microsoft.com/en-us/library/system.servicemodel.web.outgoingwebresponsecontext.aspx|2|http://msdn.microsoft.com/en-us/library/system.servicemodel.web.weboperationcontext.outgoingresponse.aspx|3|http://msdn.microsoft.com/en-us/library/system.servicemodel.web.outgoingwebresponsecontext.statuscode.aspx^0|9|J|X|Q|1Q|G|2K|A|9|J|0|X|Q|1|1Q|G|2|2K|A|3|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@$9|17|A|18|1|19]|$9|1A|A|1B|1|1C]|$9|1D|A|1E|1|1F]|$9|1G|A|1H|1|1I]]|E|$]]|$1|F|3|G|5|H|7|1J|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]|S|$5|N|O|P|E|$Q|T]]|U|$5|N|O|P|E|$Q|V]]|W|$5|N|O|P|E|$Q|X]]]]

There is a <a href="http://msdn.microsoft.com/en-us/library/system.servicemodel.web.weboperationcontext.aspx" rel="noreferrer"><code>WebOperationContext</code></a> that you can access and it has a <a href="http://msdn.microsoft.com/en-us/library/system.servicemodel.web.weboperationcontext.outgoingresponse.aspx" rel="noreferrer"><code>OutgoingResponse</code></a> property of type <a href="http://msdn.microsoft.com/en-us/library/system.servicemodel.web.outgoingwebresponsecontext.aspx" rel="noreferrer"><code>OutgoingWebResponseContext</code></a> which has a <a href="http://msdn.microsoft.com/en-us/library/system.servicemodel.web.outgoingwebresponsecontext.statuscode.aspx" rel="noreferrer"><code>StatusCode</code></a> property that can be set.

<pre><code>WebOperationContext ctx = WebOperationContext.Current;
ctx.OutgoingResponse.StatusCode = System.Net.HttpStatusCode.OK;
</code></pre>

blocks|key|1524713|text|如果您需要返回原因正文，那么可以查看WebFaultException|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1524714|例如|1524715|throw+new+WebFaultException<string>("Bar+wasn't+Foo'd",+HttpStatusCode.BadRequest+);|code-block|syntax|javascript|1524716|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/dd989924.aspx^0|I|H|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

If you need to return a reason body then have a look at <a href="http://msdn.microsoft.com/en-us/library/dd989924.aspx">WebFaultException</a> 

For example 

<pre><code>throw new WebFaultException&lt;string&gt;("Bar wasn't Foo'd", HttpStatusCode.BadRequest );
</code></pre>

blocks|key|1739801|text|如果你想在头部看到状态描述，REST方法应该确保在Catch()部分返回null，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1739802|catch+(ArgumentException+ex)
{
++++WebOperationContext.Current.OutgoingResponse.StatusCode+=+HttpStatusCode.InternalServerError;
++++WebOperationContext.Current.OutgoingResponse.StatusDescription+=+ex.Message;
++++return+null;
}|code-block|syntax|javascript|1739803|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you wish to see the status description in the header, REST method should make sure to return null from the Catch() section as below:

<pre><code>catch (ArgumentException ex)
{
 WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.InternalServerError;
 WebOperationContext.Current.OutgoingResponse.StatusDescription = ex.Message;
 return null;
}
</code></pre>

blocks|key|1524800|text|这对我的WCF数据服务不起作用。相反，您可以在使用数据服务的情况下使用DataServiceException。我发现下面这篇文章很有用。http://social.msdn.microsoft.com/Forums/en/adodotnetdataservices/thread/f0cbab98-fcd7-4248-af81-5f74b019d8de|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1524801|entityMap|0|LINK|mutability|MUTABLE|url|http://social.msdn.microsoft.com/Forums/en/adodotnetdataservices/thread/f0cbab98-fcd7-4248-af81-5f74b019d8de^0|1X|30|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This did not work for me for WCF Data Services. Instead, you can use DataServiceException in case of Data Services. Found the following post useful.
<a href="http://social.msdn.microsoft.com/Forums/en/adodotnetdataservices/thread/f0cbab98-fcd7-4248-af81-5f74b019d8de" rel="nofollow">http://social.msdn.microsoft.com/Forums/en/adodotnetdataservices/thread/f0cbab98-fcd7-4248-af81-5f74b019d8de</a>

blocks|key|1524816|text|WebOperationContext.Current.OutgoingResponse.StatusCode+=+HttpStatusCode.Unauthorized;
throw+new+WebException("令牌码不正确",+new+InvalidTokenException());|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1524817|参考：https://social.msdn.microsoft.com/Forums/en-US/f6671de3-34ce-4b70-9a77-39ecf5d1b9c3/weboperationcontext-http-statuses-and-exceptions?forum=wcf|unstyled|offset|length|1524818|entityMap|0|LINK|mutability|MUTABLE|url|https://social.msdn.microsoft.com/Forums/en-US/f6671de3-34ce-4b70-9a77-39ecf5d1b9c3/weboperationcontext-http-statuses-and-exceptions?forum=wcf^0|0|3|3Y|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@$G|S|H|T|1|U]]|A|$]]|$1|I|3|-4|5|F|7|V|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P]]]]

<pre><code>WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.Unauthorized;
throw new WebException("令牌码不正确", new InvalidTokenException());
</code></pre>

ref:<a href="https://social.msdn.microsoft.com/Forums/en-US/f6671de3-34ce-4b70-9a77-39ecf5d1b9c3/weboperationcontext-http-statuses-and-exceptions?forum=wcf" rel="nofollow">https://social.msdn.microsoft.com/Forums/en-US/f6671de3-34ce-4b70-9a77-39ecf5d1b9c3/weboperationcontext-http-statuses-and-exceptions?forum=wcf</a>

blocks|key|1524851|text|您还可以使用WebOperationContext的StatusCode和StatusDescription返回状态代码和原因正文|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1524852|WebOperationContext+context+=+WebOperationContext.Current;
context.OutgoingResponse.StatusCode+=+HttpStatusCode.OK;
context.OutgoingResponse.StatusDescription+=+"Your+Message";|code-block|syntax|javascript|1524853|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.weboperationcontext?view=netframework-4.7.2|1|https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.outgoingwebresponsecontext.statuscode?view=netframework-4.7.2|2|https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.outgoingwebresponsecontext.statusdescription?view=netframework-4.7.2^0|6|J|0|Q|A|1|11|H|2|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]|$A|Y|B|Z|1|10]|$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]|S|$5|L|M|N|C|$O|T]]]]

You can also return a statuscode and reason body with <a href="https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.weboperationcontext?view=netframework-4.7.2" rel="nofollow noreferrer">WebOperationContext</a>'s <a href="https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.outgoingwebresponsecontext.statuscode?view=netframework-4.7.2" rel="nofollow noreferrer">StatusCode</a> and <a href="https://docs.microsoft.com/en-us/dotnet/api/system.servicemodel.web.outgoingwebresponsecontext.statusdescription?view=netframework-4.7.2" rel="nofollow noreferrer">StatusDescription</a>:

<pre><code>WebOperationContext context = WebOperationContext.Current;
context.OutgoingResponse.StatusCode = HttpStatusCode.OK;
context.OutgoingResponse.StatusDescription = "Your Message";
</code></pre>

If something goes wrong in a WCF REST call, such as the requested resource is not found, how can I play with the HTTP response code (setting it to something like HTTP 404, for example) in my OperationContract method?

How can I return a custom HTTP status code from a WCF REST method?

如果在WCF REST调用中出现错误，比如没有找到请求的资源，我该如何处理OperationContract方法中的HTTP响应代码(例如，将其设置为HTTP404之类的代码)？

问如何从WCF REST方法返回自定义HTTP状态代码？
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