Question

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How to get JSON response from a 3.5 asmx web service

rated 0 times [ 27] [ 7] / answers: 1 / hits: 57286 / 11 Years ago, thu, october 24, 2013, 12:00:00

I have the following method:

using System.Web.Services;

using System.Web.Script.Services;

using System.Web.Script.Serialization;

using Newtonsoft.Json;

using System.Collections;



[WebService(Namespace = http://tempuri.org/)]

[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

//[System.ComponentModel.ToolboxItem(false)]

[System.Web.Script.Services.ScriptService]



// [System.Web.Script.Services.ScriptService]

public class Tripadvisor : System.Web.Services.WebService {



    public Tripadvisor () {



        //Uncomment the following line if using designed components 

        //InitializeComponent(); 

    }





    [WebMethod]

    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]

    public string HotelAvailability(string api)

    {

        JavaScriptSerializer js = new JavaScriptSerializer();

        string json = js.Serialize(api);

        //JsonConvert.SerializeObject(api);

        return json ;

    }

Here i set ResponseFormat attribute is json s still being returned as XML.

I want to json format using this asmx service
Any ideas?

Answers

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rhettforrestm

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3 Years ago

answered 11 Years ago levidaylonj · Accepted Answer

I faced the same issue, and included the below code to get it work.

[WebMethod]

[ScriptMethod(UseHttpGet=true ,ResponseFormat = ResponseFormat.Json)]

public void HelloWorld()

{

    Context.Response.Clear();

    Context.Response.ContentType = application/json;

    Context.Response.Write(Hello World);

    //return Hello World;

}

Update:

To get a pure json format, you can use javascript serializer like below.

public class WebService1 : System.Web.Services.WebService

{

    [WebMethod]

    [ScriptMethod(UseHttpGet=true ,ResponseFormat = ResponseFormat.Json)]

    public void HelloWorld()

    {

        JavaScriptSerializer js = new JavaScriptSerializer();

        Context.Response.Clear();

        Context.Response.ContentType = application/json;           

        HelloWorldData data = new HelloWorldData();

        data.Message = HelloWorld;

        Context.Response.Write(js.Serialize(data));





    }

}



public class HelloWorldData

{

   public String Message;

}

However this works for complex types, but string does not show any difference.