System Net WebException HTTP status code

Question

Is there an easy way to get the HTTP status code from a System Net WebException

User · Answer

You can try this code to get HTTP status code from WebException  It works in Silverlight too because SL does not have WebExceptionStatus ProtocolError defined   HttpStatusCode GetHttpStatusCode WebException we        if  we Response is HttpWebResponse                HttpWebResponse response    HttpWebResponse we Response          return response StatusCode            return null

User · Answer

this works only if WebResponse is a HttpWebResponse   try             catch  System Net WebException exc        var webResponse   exc Response as System Net HttpWebResponse      if  webResponse    null  amp  amp           webResponse StatusCode    System Net HttpStatusCode Unauthorized                MessageBox Show  401              else         throw

User · Answer

I do realise the question is old  but it s among the top hits on Google    A common situation where you want to know the response code is in exception handling  As of C   7  you can use pattern matching to actually only enter the catch clause if the exception matches your predicate   catch  WebException ex  when  ex Response is HttpWebResponse response         doSomething response StatusCode      This can easily be extended to further levels  such as in this case where the WebException was actually the inner exception of another  and we re only interested in 404    catch  StorageException ex  when  ex InnerException is WebException wex  amp  amp  wex Response is HttpWebResponse r  amp  amp  r StatusCode    HttpStatusCode NotFound    Finally  note how there s no need to re-throw the exception in the catch clause when it doesn t match your criteria  since we don t enter the clause in the first place with the above solution

User · Answer

By using the null-conditional operator      you can get the HTTP status code with a single line of code    HttpStatusCode  status    ex Response as HttpWebResponse   StatusCode    The variable status will contain the HttpStatusCode  When the there is a more general failure like a network error where no HTTP status code is ever sent then status will be null  In that case you can inspect ex Status to get the WebExceptionStatus   If you just want a descriptive string to log in case of a failure you can use the null-coalescing operator      to get the relevant error   string status    ex Response as HttpWebResponse   StatusCode ToString          ex Status ToString      If the exception is thrown as a result of a 404 HTTP status code the string will contain  NotFound   On the other hand  if the server is offline the string will contain  ConnectFailure  and so on       And for anybody that wants to know how to get the HTTP substatus   code  That is not possible  It is a Microsoft IIS concept that is only   logged on the server and never sent to the client

User · Answer

I m not sure if there is but if there was such a property it wouldn t be considered reliable   A WebException can be fired for reasons other than HTTP error codes including simple networking errors   Those have no such matching http error code   Can you give us a bit more info on what you re trying to accomplish with that code   There may be a better way to get the information you need

User · Answer

Maybe something like this     try                catch  WebException ex        if  ex Status    WebExceptionStatus ProtocolError                var response   ex Response as HttpWebResponse          if  response    null                        Console WriteLine  HTTP Status Code       int response StatusCode                     else                          no http status code available                     else                  no http status code available

[c#] System.Net.WebException HTTP status code

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