c# Passing an object to a REST enabled WCF Service

Question

I am trying to pass a custom object and 2 string values to a WCF service that has REST and SOAP enabled

below is the service contract

[OperationContract]
     [WebInvoke(UriTemplate = "/AddData/{Name}/{Id}", RequestFormat = WebMessageFormat.Json,
            ResponseFormat = WebMessageFormat.Json, Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped )]
           bool AddData(CustomData itm,string Name, string Id);

then I have sample code to try call the service using HTTP Client , the issue I have is that the string values get passed in but the object value is null

Im not sure if I have defined the service wrong or calling the service wrong ?

private async void button1_Click(object sender, EventArgs e)
    {
        try
        {
 var client = new HttpClient();
            var uri = new Uri("http://localhost:52309/Service1.svc/rest/AddData/test/1");

            CustomData data = new  CustomData ();
            data.description = "TEST";
            data.fieldid = "test1";
            data.fieldvalue = "BLA";

            string postBody = JsonSerializer(data);

            HttpContent contentPost = new StringContent(postBody , Encoding.UTF8, "application/json");
            HttpResponseMessage wcfResponse = await client.PostAsync(uri, contentPost).ContinueWith((postTask) => postTask.Result.EnsureSuccessStatusCode());


            client.Dispose();
 string responJsonText = await wcfResponse.Content.ReadAsStringAsync();

 }
        catch (Exception ex)
        {

        }
}

public string JsonSerializer(FormsData  objectToSerialize)
    {
        if (objectToSerialize == null)
        {
            throw new ArgumentException("objectToSerialize must not be null");
        }
        MemoryStream ms = null;

        DataContractJsonSerializer serializer = new DataContractJsonSerializer(objectToSerialize.GetType());
        ms = new MemoryStream();
        serializer.WriteObject(ms, objectToSerialize);
        ms.Seek(0, SeekOrigin.Begin);
        StreamReader sr = new StreamReader(ms);
        return sr.ReadToEnd();
    }

Is the message body supposed to contain CustomData formeatted as JSON? If so, the type needs to be Stream then you deserialise it that way. — Daniel Park
– Daniel Park, Commented Feb 4, 2015 at 16:33
Yes I think im trying to format the object as JSON, would you mind elaborating a bit , where abouts does the type need to be stream ? — Rachael M
– Rachael M, Commented Feb 4, 2015 at 16:35
Unless of course the CustomData object has some sort of deserialisation step, such as a DataContract. — Daniel Park
– Daniel Park, Commented Feb 4, 2015 at 16:55
@RachaelM sorry, I meant to link PostAsync<T> which lets you post the object directly without having to first convert to Json. — DavidG
– DavidG, Commented Feb 4, 2015 at 17:14

Rachael M · Accepted Answer · 2015-02-05 11:39:11Z

1

I resolved the issue by adding [DataContract(Namespace = "CustomData")] and [DataMember(Name = "fieldvalue")] to each variable in the class definition and then called it using PostAsJsonAsync and passing the object directly. Thanks @DanielPark and @DavidG for the pointers in the right direction

answered Feb 5, 2015 at 11:39

Rachael M

921 silver badge10 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

c# Passing an object to a REST enabled WCF Service

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related