Ajax/getjson call to REST api return array

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C#

Ajax

jQuery

REST

Hi, I have a perfectly working code for auto populate textbox via rest api(it populates after 2 characters typed). Can you assist me on modifying the same api code to find out the total length of array(/total companies) and assign to textbox val something like $("#TotalCompany").val(...) I currently have autopopulate companies $("#Company").autocomplete working just fine.

$(document).ready(function () {
  var baseServiceUrl = 'http://services.appserver.com/';
  $("#Company").autocomplete({
                     minLength: 2,
                     source: function (request, response) {
                      $.getJSON(baseServiceUrl + '/company/name/' + request.term + '/?callback=?',
                      {
                                   contextKey: function () {
                                  // applies to associated parties
                                 var key = $(this).parent().parent().find('.type').val();
                                 if (key !== "--Select--" && key !== "")
                                          key = key === "O" ? "Company" : "Company";
                                  else
                                          key = "";
                                 return key;
                         },
                         format: "json"
                   },
                   function (data) {
                                     response($.map(data,
                                     function (item) {
                                                               return {
                                                                               label: item['Company'].replace(/&/g, '&'),
                                                                               value: item['Company'].replace(/&/g, '&')
                                                                            }
                        }));
      }).sort();
}

});
});

The web service API return something similar to the script below:

…
…
…

Please let me know if you need more details Greatly appreciated any help

What I have tried:

<ArrayOfCompany xmlns="http://schemas.datacontract.org/2004/07/CR.WebServices.Model.EntityFramework" xmlns:i=http://www.w3.org/2001/XMLSchema-instance>
<Company>…</Company>
<Company>…</Company>
<Company>…</Company>
</ArrayOfCompany>