How Can I Pass Parameters To A Jquery $.Getjson Method?

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Ajax

jQuery

MVC5

Hi,
I m new to jquery. I'm trying to use JQuery to call some action of controller by Ajax/$.getJSON . I'm trying to pass a custom value into the Ajax callback method, but this not executed. I use debugger but not getting error. This is my code:-

function getAllRecords(sub,code) {
  fetching = true;
  $.getJSON("/Search/SearchResultsJson/?sub=" + sub + "&code=" + code + "&callback=?", function (data) {
      debugger;
      alert('result')
      setupDone = true;
    fetching = false;
  
    $("#mapOverlay").hide();
    $("#loadingLabel").hide();

    if (firstSearch) {
      distanceWidget = new DistanceWidget({
        map: map,
        distance: 1, // Starting distance in km.
        maxDistance: 4, // Twitter has a max distance of 2500km.
        color: '#000000',
        activeColor: '#5599bb',
        sizerIcon: 'Images/resize-off.png',
        activeSizerIcon: 'Images/resize.png'
      });

i use debugger but it not executed inside function(data).

Thanks