ASP.NET service with an added quotation mark in the JSON response!

I am trying to make a web service method call in JavaScript within an ASP.NET 3.5 environment.

After inspecting the result using Firebug, I found the following:

{"d":"[{\"TI\":\"www\"},{\"TI\":\"www1\"}]"}

It seems that the correct result should be formatted like this:

{"d":[{\"TI\":\"www\"},{\"TI\":\"www1\"}]}

Why is there a quotation mark before and after the brackets?

// Update:

public class Test
    {
        public Test(string t){T1 = t;}
        public string T1 { set; get; }
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = true, XmlSerializeString = false)]
    public string Load(string e)
    {
        List<Test> post = new List<Test> { new Test("www"), new Test("www1") };
        return JsonConvert.SerializeObject(post);
    }

And in the JavaScript file:

 var store = new Ext.data.JsonStore({
        proxy: new Ext.data.HttpProxy({
            url: '/core/webservice/service.asmx/Load',
            method: 'GET',
            headers: { 'Content-type': 'application/json' }
        }),
        root: 'd',
        id: 'Id',
        fields: ['TI']
    });
    store.load({ params: { e: ''} });
    return; 

Thank you,

Mir

Answer №1

There's no need for manual serialization in your web service; consider utilizing the following approach instead:

public List<Example> Retrieve(string parameter)
{
    List<Example> list = new List<Example> { new Example("www"), new Example("www1") };
    return list;
}

Given that you're using string as your return type, it will handle the conversion automatically during serialization.

Answer №2

This excerpt highlights the distinction between a string and an array:

var x = {"s":"[{\"AX\":\"example\"},{\"AX\":\"example1\"}]"};

Accessing x["s"] directly will yield a string instead of an array of objects. To convert the string into an array of objects in javascript, you can use:

var y = eval(x["s"]);

Alternatively, if this issue persists, it might be beneficial to share the code responsible for this behavior so that it can be further investigated and resolved.

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