vb.net - HTTP Web request 500 Internal Server error? -


am making call webservice soapexception error responds "the remote server returned error: (500) internal server error" when use wireshark or fiddler status error,status code , status description of error not "the remote server returned error: (500) internal server error". how can these error information directly vb2010 

sub readsoap()      dim webrequest httpwebrequest     'dim reader streamreader     dim response httpwebresponse = nothing     dim result string     dim data string = ""     dim url string = ""     dim xdoc new xmldocument     result = ""     textbox1.text = ""     dim xml string = ""      xml = "<soapenv:envelope xmlns:soapenv=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:v1=""http://xmlns.bb.com/request/v1"" xmlns:v3=""http://xmlns.bb.com/requestheader/v3"" xmlns:v2=""http://xmlns.bb.com/parametertype/v2"">" _     & "<soapenv:header xmlns:wsse=""http://aaa.bb-open.org/wss/2004/01/aaa-200401-wss-wssecurity-secext-1.0.xsd"">" _       & "<wsse:security>" _          & "<wsse:usernametoken>" _             & "<wsse:username>{8}</wsse:username>" _             & "<wsse:password>{9}</wsse:password>" _          & "</wsse:usernametoken>" _       & "</wsse:security>" _    & "</soapenv:header>" _              & "<soapenv:body>" _               & "<v1:brequest>" _                & "<v3:requestheader>" _                 & "<v3:information>" _                  & "<v3:id>{0}</v3:id>" _                  & "<!--optional:-->" _                  & "<v3:traid></v3:traid>" _                  & "<v3:count>r</v3:coun>" _                  & "<v3:corid>3465fgfrwsdss</v3:corid>" _                 & "</v3:information>" _                & "</v3:requestheader>" _                & "<v1:requestbody>" _                 & "<v1:action>{10}</v1:action>" _                 & "<!--optional:-->" _                 & "<v1:deb>{1}</v1:deb>" _                 & "<v1:cre>{2}</v1:cre>" _                 & "<v1:am>{3}</v1:am>" _                 & "<!--optional:-->" _                 & "<v1:tid></v1:tid>" _                 & "<!--optional:-->" _                 & "<v1:inid></v1:inid>" _                 & "<!--optional:-->" _                 & "<v1:addiparam>" _                  & "<v2:parametertype>" _                   & "<v2:parametername>{4}</v2:parametername>" _                   & "<v2:parametervalue>{5}</v2:parametervalue>" _                  & "</v2:parametertype>" _                  & "<v2:parametertype>" _                   & "<v2:parametername>{6}</v2:parametername>" _                   & "<v2:parametervalue>{7}</v2:parametervalue>" _                  & "</v2:parametertype>" _                 & "</v1:addiparameters>" _                & "</v1:requestbody>" _               & "</v1:brequest>" _              & "</soapenv:body>" _             & "</soapenv:envelope>"      url = "http://123.456.78.5548:5545/abc/serv/custinfo"     webrequest = directcast(system.net.webrequest.create(url), httpwebrequest)     webrequest.method = "post"     webrequest.usedefaultcredentials = false     webrequest.proxy = ctype(nothing, iwebproxy)     webrequest.contenttype = "application/x-www-form-urlencoded"     dim postdata string = string.format(xml, "req", "123", "443", 100, "wedge", "0002", "con", "prep", "", "", "")     webrequest.contentlength = postdata.length     webrequest.keepalive = true      'try     dim writer new streamwriter(webrequest.getrequeststream(), system.text.encoding.ascii)     writer.write(postdata)     writer.close()     response = directcast(webrequest.getresponse(), httpwebresponse)     if response.statuscode = httpstatuscode.ok         xdoc.load(webrequest.getresponse().getresponsestream()) ' fast         txtresponse.text = xdoc.innertext     end if      'catch ex exception     'txtresponse.text = ex.message     ' end try end sub

instead of:

 if response.statuscode = httpstatuscode.ok      'rest of code  end if

why don't do:

select case response.statuscode       case httpstatuscode.ok     'handle ok      case httpstatuscode.internalservererror    'handle server error accessing error message returned      case ... 'another status code  end select

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