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POWebInvoke Parameter is NULL
 

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    <p>I have a service where the operation contract looks like the following. I have a WebInvoke attribute and the method is set to POST. I do have a UriTemplate. The actual service method name is SaveUser. I am trying to pass in a User object (a data contract with properties annotated as data member attributes).</p> <pre><code>[OperationContract] [WebInvoke(Method = "POST", UriTemplate = "SaveUser", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json)] User SaveUser(User user); </code></pre> <p>The client looks like the following. For simplicity I have excluded the token and authorization etc.:</p> <pre><code>using (WebClient webClient = new WebClient()) { try { Random r = new Random(); var partitionKey = Guid.NewGuid().ToString(); var rowKey = r.Next(999900, 999999).ToString(); User u = new User() { UserId = partitionKey, FirstName = "First-" + DateTime.Now.Ticks.ToString(), LastName = "Last-" + DateTime.Now.Ticks.ToString(), LoginName = rowKey, Password = "password1", PayPalEmailAddress = "First" + DateTime.Now.Ticks.ToString() + "@verascend.com", PhoneNumber = "+1206" + r.Next(1234567, 9999999).ToString() }; string url = serviceBaseUrl + "/SaveUser"; webClient.Headers["Content-type"] = "application/json; charset=utf-8"; // webClient.Headers[HttpRequestHeader.Authorization] = authToken; DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(User)); using (var memStream = new MemoryStream()) { ser.WriteObject(memStream, u); Debug.WriteLine("-------------&gt; "+ByteArrayToString(memStream.ToArray())); webClient.UploadData(url, "POST", memStream.ToArray()); } } catch (WebException ex) { if (ex.Status == WebExceptionStatus.ProtocolError) { string responseText = string.Empty; using (Stream responseStream = ((HttpWebResponse)ex.Response).GetResponseStream()) { using (StreamReader streamReader = new StreamReader(responseStream)) { responseText = streamReader.ReadToEnd(); } } throw new Exception(responseText); } else { throw new Exception(ex.Message.ToString()); } } } </code></pre> <p><strong>Problem:</strong> The service method (actual service) is receiving the param (User) as NULL. What am I doing wrong? I tried adding the known type in the service contract but no luck.</p>
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    1. COThis may be due to your wrap style, if so [this question](http://stackoverflow.com/a/7275977/419956) may be a duplicate.
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      1. USJeroen
    2. COYou could perhaps try to inspect the actual messages arriving at the service, tell us what the body looks like?
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