How to return a pure Json (without XML encapsulation) using webservice in c#

Question

I’m with a webservice running locally, which conducts queries directly in a database through a string type parameter. Follow the outcome of the consultation:

The second moment I have an application in javascript (Jquery) that consumes the webservice via Ajax. After some research I came to the conclusion that the problem is the XML encapsulation, because I’m trying to consume the Json via Ajax.

Jquery application trying to consume wbeservice c# via Ajax:

$("#btnConsultar").on("click",function(){

            var NTalao = $("#campoTalao").val();


            $.ajax({

                url: "...",
                type: "GET",
                contentType: "application/json",
                data: {"Talao": NTalao},
                success: function(data){
                    $("#resDIV").html(data);

                },
                error: function(){
                alert("Erro!");
                }
            });

        });

Webservice c# returning encapsulated Json:

[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    [WebMethod]
    public string Consultar(string _Talao)
    {

        Model1 cadastro = new Model1();
        clsRecibo recibo = new clsRecibo();

        var consulta = from a in cadastro.TB_Recibo
                       where a.Talao == _Talao
                       select a;


        foreach (var linha in consulta)
        {
            recibo.Talao = linha.Talao;
            recibo.Apresentante = linha.Apresentante;
            recibo.TipoServico = linha.TipoServico;
            recibo.Status = linha.Status;
            recibo.Obs = linha.Obs;
        }

        JavaScriptSerializer js = new JavaScriptSerializer();

        return js.Serialize(recibo);

    }

Basic question: Is it possible to remove this XML package from the query?? Otherwise, I can perform the query by the application otherwise?

Thank you!!

Answer 1

So that the attribute ScriptMethod be interpreted, you need to ensure that the module System.Web.Extensions be loaded.

Two amendments to the sitting system.web in his web.config are necessary:

<assemblies>
    <add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</assemblies>

<httpHandlers>
    <remove verb="*" path="*.asmx"/>
    <add verb="*" path="*.asmx" type="System.Web.Script.Services.ScriptHandlerFactory" validate="false"/>
</httpHandlers>

Original post in the OS in English.

Answer 2

Hudson, modify the method to void and return as follows:

 HttpContext.Current.Response.ContentType = "application/json";
 HttpContext.Current.Response.Write(js.Serialize(recibo));
 HttpContext.Current.Response.End();