how do use d3.js with in my asp.net

function getPosts() {
try {

$.ajax({

type: "post",

url: "Service1.asmx/GetPostings",

data: "{}",

contentType: "application/json; charset=utf-8",

dataType: "json",

success: function (response) {

var jposts = response.d;

$('#output').empty();

$.each(jposts, function (index, jpost) {

$('#output').append('<p>Job Posting: ' + jpost.dates + '<br />Job Id: ' +
jpost.value + '<br />Internal/External: ' +



'</p>');

});

},

failure: function (msg) {

$('#output').text(msg);

}

});
}
catch (e) {
alert(1);
}
I Have used this code to return to a asp.net web form but it is not working,
if it returns some data i can embed that data into json object and pass it to d3.js

it doesnt have any errors but it is not returing any values ;
how do read all the values which is returned by the web service object,and web service is returning all the results from the sql