How To pass variable data in view to controller on button click ? datatable

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JSON

DataTable

MVC4

I am facing a weird issue .
I gone through every possible way in google but no luck so far.possible help me if i am missing something ?

I done some comment stuff in my code below what i am looking exactly . To be short I just need a way to pass my prompt text which is stored in a Variable 'delreason' to CONTROLLER DELETE METHOD on my button click which is surely go to controller Delete method ?

My Code :

 delreason = '';
    $(document).ready(function () {
        var reason = $("#DropDown_Select").val()
        var oTable;


        $('#btnDeleteRow').click(function () {
            delreason = prompt("r u serious");
//When delete button is clicked i need to first gather the reason and pass to controller delete method i.e I ADOPTED QUERY STRING WAY as BELOW YOU CAN FIND sDeleteURL used like  query string so i can pass my Row-id asusual and additinally i can pass my prompt text entered .


            $(this).prop('disabled', true);

        });

            $('#myDataTable').dataTable().fnDestroy();

            oTable = $('#myDataTable').dataTable({
                "bProcessing": true,
                "bServerSide": true,
                "bAutoWidth": true,
                "bDestroy": true,
                "sAjaxSource": "AjaxHandler",
                "fnServerData": function (sSource, aoData, fnCallback) {

                    $('#DropDown_Select').change(function () {
                        alert($(this).val());
                        reason = $(this).val()
                        debugger;
                        //oTable.fnFilter($(this).val());
                        $.ajax({
                            "type": "GET",
                            "dataType": 'json',
                            "contentType": "application/json; charset=utf-8",
                            "url": sSource + "/" + reason,
                            "data": aoData,
                            "success": function (data) {

                                fnCallback(data);
                            }
                        });


                    });
                    $.ajax({
                        "type": "GET",
                        "dataType": 'json',
                        "contentType": "application/json; charset=utf-8",
                        "url": sSource + "/" + reason,
                        "data": aoData,
                        "success": function (data) {

                            fnCallback(data);
                        }
                    });
                },
                "bJQueryUI": true,
                "sPaginationType": "full_numbers",
                "aoColumns": [
                          {
                              "sName": "Lead_Id"
                                            ,
                              "bVisible": false,
                              "bSearchable": false,
                              "bSortable": false

                          },
                          {
                              "sName": "LeadName"
                              ,
                              "fnRender": function (oObj) {
                                  return '<a href=\"LeadIndividualDetail/' + oObj.aData[0] + '\">' + oObj.aData[1] + '</a>';
                              }
                          },
                           { "sName": "ContactName", "sClass": "hidden-xs" },
                           { "sName": "CompanyName" },
                           { "sName": "Product" }

                ]

            });


                oTable.makeEditable({

                    "sDeleteURL": "/Lead/DeleteData/?start=" + delreason, // query string way via URL .
                    sDeleteHttpMethod: "GET",
                    "event": "click",
                    "style": "inherit",
                    "width": ($('myDataTable').width() - 40) + "px",
                    "height": ($('myDataTable').height() + 20) + "px",
                    "aoColumns":
                    [
                        null,
                        null,
                        null,
                        null
                    ]
                });

      $("#myDataTable tbody tr").on('click', function (event) {
          debugger;
          alert("now");
          $("#myDataTable tbody tr").removeClass('row_selected');
          $(this).addClass('row_selected');
      });

    });

//I am getting row id at controller delete method but i am unable to get the prompt text in my controller where i tried to access like

var ReasonForDeletion = Request.QueryString["start"];

Am I missing something ? any better alternative is appreciated ?

I found some workaround but sadly its redirecting to other issue : If i want to get the PROMPT text at my controller i want to RELOAD MY **oTable.makeEditable({** CONTENT .. well but trying this simply i can't further move to select and delete any row after deleting firstRow ..

Any killer way to pass my prompt text using query string or whatever is appreciated to my controller Deletemethod on my click .

Regards