Getting null values when sending object parameter as JSON object to WCF service method

Question

Here is my service method signature:

    [OperationContract]
    [System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST")]
    void RegisterNewUser(User user);

Also Type User have DataContract attribute on class and DataMember attributes on its properties

and here is how I am calling the service method:

 String data = "{\"user\":{\"__type\" : \"User:#PingMe\",\"EmailID\": \"[email protected]\",\"RegistrationID\": \"sdfhjklsdgkdfjgklgdjfklg\"}}";  
        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:2443/NotificationService.svc/RegisterUser");
        httpWebRequest.Method = "POST";
        byte[] bytes = Encoding.UTF8.GetBytes(data);
        httpWebRequest.ContentLength = bytes.Length;
        httpWebRequest.ContentType = "text/json; charset=utf-8";
            httpWebRequest.KeepAlive = false;
        Stream requestStream = httpWebRequest.GetRequestStream();
        requestStream.Write(bytes,0,bytes.Length);
        requestStream.Close();


        HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();

It call the service method succesfully, but in service method's user parameter user.EmailID and User.RegistrationID always come 'NULL'

Any Idea what I am missing here?

Do I need to set RequestFormat property as WebMessageFormat.JSON? in OperationContract attribute?

Thanks

Have you made the [DataMember] attributes to your User properties? — user2315834
– user2315834, Commented Apr 24, 2013 at 13:47

RohitWagh · Accepted Answer · 2012-09-21 12:48:12Z

0

Change this

httpWebRequest.ContentType = "text/json; charset=utf-8";

TO this:

httpWebRequest.ContentType = "application/json; charset=utf-8";

and this:

[System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST")]

to this:

[System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST", BodyStyle=WebMessageBodyStyle.WrappedRequest,
            ResponseFormat = WebMessageFormat.Json,
            RequestFormat = WebMessageFormat.Json)]

answered Sep 21, 2012 at 12:48

RohitWagh

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Comments

abhinavsinghvirsen · Accepted Answer · 2017-11-03 14:27:09Z

0

in your Server Increase MaxpostSize property i dont have much knowledge on IIS but i think it will work for you

 <requestLimits maxAllowedContentLength ="<length>" />

answered Nov 3, 2017 at 14:27

abhinavsinghvirsen

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