$ajax({
url: '/Student/Show/',
dataType: "json",
type: "GET",
contentType: 'application/json; charset=utf-8',
data: { id: $("#txtroll").val() },
success: function (data) {
var html="";
$j.each(data, function
(i, item) {
html += "<tr><td>" + item.roll + "</td><td>" + item.Name + "</td><td>" + item.city + "</td></tr>";