ASP.NET WebMethod returning object as json but not in response method

Question

I have a simple webmethod:

<WebMethod(Description:="Does something.")> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
Public Shared Function ReturnJSONData() As Person
    Dim guy As New Person
    guy.Name = "Joe"
    guy.Age = 8
    Return guy
End Function

and here is where I am calling the ajax method:

 function GetPerson() {
     PageMethods.ReturnJSONData(OnWSRequestComplete1);
 }
 function OnWSRequestComplete1(result) {
     alert(result.d);
 }

When I use a tool like firebug, I can see the JSON results:

{"d":{"__type":"Person","Name":"Joe","Age":8}}

However, when I call the "alert(result.d)" I get undefined. Am I missing something?

Answer 1

When you get a response from a WebMethod, you need to eval the response because it is returned as a string. I'd hesitate against using eval in your code because the security risks.

If you're using jQuery you can call jQuery.parseJSON(result) which will return the actual Javascript object you expect.