JQgrid file upload with form edit

I have JQgrid with form edit.

 jQuery("#tblPriceListUpload").jqGrid({
        url: $('#tblPriceListUpload').attr("RequestUrl"),
        postData: { PriceListType: SelectedPriceListType },
        datatype: "json",
        mtype: "Get",
        hoverrows: false,
        ajaxGridOptions: { timeout: 30000 },
        colNames: PriceListColName,
        colModel: PriceListColModel,
        cmTemplate: { editable: true },
        rowNum: 10,
        hidegrid: false,
        rownumbers: true,
        pager: '#PriceListGridPager',
        viewrecords: true,
        caption: "Price List ",
        height: 'auto',
        scrollOffset: 0,
        gridview: true,
        shrinkToFit: true,
        autoencode: true,
        loadonce: true,
        ignoreCase: true,
        enableClear: true,
        width: '1000',
        beforeRequest: function () {

            //responsive_jqgrid($(".jqGrid"));
        }
    });

    $('#tblPriceListUpload').jqGrid('filterToolbar', { searchOnEnter: false, enableClear: false, defaultSearch: "cn", stringResult: true });

For Form Add

  $("#tblPriceListUpload").jqGrid('navGrid', '#PriceListGridPager',
           { edit: true, add: true, del: true, refresh: true, view: false, search: false },
           { //Edit Code here
               }, {

               caption: "",
               title: "Add Attachment",
               id: "add_Attachment",
               buttonicon: "ui-icon-plus",
               position: "first",
               url: 'AddPriceList',
               recreateForm: true,
               onclickSubmit: function (response, postdata) {
                   debugger;
                   if (jqXHRData) {
                       //jqXHRData.submit();
                       $("#Form").submit();
                       $("#FormError").remove();

                   }
               },
               beforeShowForm: function (form) {
                   $("#PriceListType").val(SelectedPriceListType);
                   $("#tr_PriceListType").hide();
                   $('#FileName').fileupload({
                       replaceFileInput: false,
                       dataType: 'json',
                       url: 'AddPriceList',
                       change: function (e, data) { },
                       add: function (e, data) {
                           jqXHRData = data
                       },
                       done: function (event, data) {

                           alert(data.result.message)
                           $("#cData").trigger('click');
                           $("#tblPriceListUpload").setGridParam({ datatype: 'json', page: 1 }).trigger("reloadGrid");
                           jqXHRData = null;
                       },
                       fail: function (event, data) {

                           if (data.files[0].error) {
                               alert(data.files[0].error);
                           }
                       }
                   });
               }

           }, {});

And Col Model Below

     var PriceListColModel = [{ name: 'DisplayDescription', index: 'DisplayDescription', align: 'center', editable: true, },
           {
               name: 'Header', index: 'Header', width: 95, align: 'center', formatter: 'select', editable: true,
               edittype: 'select', editoptions: { value: HeaderList, defaultValue: 'HP Oct 12 - GOs' },
               stype: 'select', searchoptions: { sopt: ['eq', 'ne'], value: ':All;' + HeaderList }
           },

    {
        name: 'OneSeriesPerPage', index: 'OneSeriesPerPage', align: 'center', formatter: 'checkbox', edittype: 'checkbox',
        editoptions: { value: "true:false", defaultValue: "true" }, editable: true
    },
{
    name: 'EnvironmentCode', index: 'EnvironmentCode', search: true, editable: true,
    edittype: 'select', editoptions: { value: EnvList, defaultValue: 'AFI' },
    stype: 'select', searchoptions: { sopt: ['eq', 'ne'], value: ':All;' + EnvList }
},
{
    name: 'FileName', index: 'FileName', edittype: 'file', editable: true,
    edittype: 'file',
    editoptions: {
        enctype: "multipart/form-data"
    }, search: true
},
    {
        name: 'PriceListType', index: 'PriceListType', align: 'center', hidden: true, editrules: {
            required: true,
            edithidden: true
        }
    }];

In "OnclickSubmit" event of "AddPriceList" if i am posting jqXHRData.submit(); If Check Box column is false it is not sending the data to controller. If true, it is sending the data to controller.

If i am posting the form $("#Form").submit(); I am not getting the file in Controller.

Please help on this issue.