C# Rest API return dynamic object

Question

I have an webservice

WebServiceHost webServiceHost= new WebServiceHost(typeof(WebMethods), new Uri(url));
webServiceHost.Open();

public class Fish { public string name = "I am a fish"; }
public class Dog { public int legs = 4; }
public class Cat { public DateTime dt = DateTime.Now;}

One of my webMethods should return a dynamic object

WebMethod:

Solution 1

[OperationBehavior]
[WebGet(ResponseFormat = WebMessageFormat.Json, UriTemplate = "/isTest?class={cl}")]
object isTest(string cl)
{
    object obj;

    switch (cl)
    {
        case "fish":
            obj= new Fish();
            break;
        case "dog":
            obj= new Dog();
            break;
        default:
            obj= new Cat();
            break;

    }
    return obj;

}

Solution 2

[OperationBehavior]
[WebGet(ResponseFormat = WebMessageFormat.Json, UriTemplate = "/isTest?class={cl}")]
dynamic isTest(string cl)
{
    dynamic obj;

    switch (cl)
    {
        case "fish":
            obj= new Fish();
            break;
        case "dog":
            obj= new Dog();
            break;
        default:
            obj= new Cat();
            break;

    }
    return obj;
}

Both are not working. The response is ERR_CONNECTION_RESET

Any idea how to realise it? Thanks for help.

Set a breakpoint on 'return obj'. Is the appropriate object returned? — Eminem
– Eminem, Commented Mar 22, 2016 at 7:07
Type in the full url (localhost:8323/somewebservice/isTest?class=fish) in a web browser and give the full error msg. if you are using IE try pressing F11 (I think) and watch your network responses — Eminem
– Eminem, Commented Mar 22, 2016 at 7:13
In the Networktab i just get the information that the result is aborted... My other webMethod /running returns true.. So i have no connection problems. — patrick d.
– patrick d., Commented Mar 22, 2016 at 7:24
Maybe you should specify [DataContract] attribute to your returning class? stackoverflow.com/questions/29170160/… — David S.
– David S., Commented Mar 22, 2016 at 7:32

Eminem · Accepted Answer · 2016-03-22 07:23:21Z

0

You are not returning a JSON string. Add the following to your uses:

using System.Web.Script.Serialization;

and the following in your body

return new JavaScriptSerializer().Serialize(obj);

change your return type to string instead of object

answered Mar 22, 2016 at 7:23

Eminem

7,51615 gold badges57 silver badges97 bronze badges

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

2 Comments

David S. Over a year ago

OP has already used ResponseFormat = WebMessageFormat.Json. It is expected that the WCF do the translation.

patrick d. Over a year ago

I need to return an object. Returning a string is not a possible solution.

Chandni K · Accepted Answer · 2016-03-22 09:12:59Z

0

You can cast the "HttpResponseMessage" response or you can just send the model object in create response method.

[WebGet(UriTemplate = "{id}")]
public HttpResponseMessage isTest(int id)
{
   Model model = Model.table.Where(p => p.Id == id).FirstOrDefault();
   if (model != null)
   {
      //return Request.CreateResponse<Model>(HttpStatusCode.OK, model);
      //or
      return Request.CreateResponse(HttpStatusCode.OK, model);
   }
   else
   {
      return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Model Not Found");
   }
}

answered Mar 22, 2016 at 9:12

Chandni K

1

Collectives™ on Stack Overflow

C# Rest API return dynamic object

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related