/*         A
         /   \
        B     C
        |    /|\
        D   E F G
        |
        H
        
*/

declare @t table
(
   id char(1) primary key not null,
   pid char(1) null --references @t
);

insert @t
values ('A', null), ('B','A'),('C','A'),
('D','B'), ('H','D'),('E','C'),('F','C'),('G','C');

with cte as 
(
select id
from @t 
where pid = 'A'

union all

select t.id
from cte c
join @t t
on t.pid = c.id
)
select * from cte

                colModel: [
                    {
                        // سایر ستون‌ها
                        name: 'myac', width: 80, fixed: true, sortable: false,
                        resize: false, formatter: 'actions',
                        formatoptions: {
                            keys: true
                        }
                    }
                ],

                colModel: [
                    {
                        name: 'Id', index: 'Id', align: 'right', width: 70,
                        editable: false
                    },
                    {
                        name: 'Name', index: 'Name', align: 'right', width: 100,
                        editable: true, edittype: 'text',
                        editoptions: {
                            maxlength: 40
                        },
                        editrules: {
                            required: true
                        }
                    },
                    {
                        name: 'Supplier.Id', index: 'Supplier.Id', align: 'right', width: 110,
                        editable: true, edittype: 'select',
                        editoptions: {
                            dataUrl: '@Url.Action("SuppliersSelect","Home")'
                        },
                        editrules: {
                            required: true
                        }
                    },
                    {
                        name: 'Category.Id', index: 'Category.Id', align: 'right', width: 110,
                        editable: true, edittype: 'select',
                        editoptions: {
                            dataUrl: '@Url.Action("CategoriesSelect","Home")'
                        },
                        editrules: {
                            required: true
                        }
                    },
                    {
                        name: 'Price', index: 'Price', align: 'center', width: 100,
                        formatter: 'currency',
                        formatoptions:
                        {
                            decimalSeparator: '.',
                            thousandsSeparator: ',',
                            decimalPlaces: 2,
                            prefix: '$'
                        },
                        editable: true, edittype: 'text',
                        editrules: {
                            required: true,
                            number: true,
                            minValue: 0
                        }
                    },
                    {
                        name: 'myac', width: 80, fixed: true, sortable: false,
                        resize: false, formatter: 'actions',
                        formatoptions: {
                            keys: true
                        }
                    }
                ],

        public ActionResult SuppliersSelect()
        {
            var list = ProductDataSource.LatestProducts;
            var suppliers = list.Select(x => new SelectListItem
            {
                Text = x.Supplier.CompanyName,
                Value = x.Supplier.Id.ToString(CultureInfo.InvariantCulture)
            }).ToList();
            return PartialView("_SelectPartial", suppliers);
        }

 @model IList<SelectListItem>

@Html.DropDownList("srch", Model)

$('#list').jqGrid({
   caption: "آزمایش چهارم",
   //url from wich data should be requested
   url: '@Url.Action("GetProducts","Home")',
   //url for edit operation
   editurl: '@Url.Action("EditProduct","Home")',

        [HttpPost]
        public ActionResult EditProduct(Product postData)
        {
            //todo: Edit product based on postData

            return Json(true);
        }

            $('#list').navGrid(
                '#pager',
                //enabling buttons
                { add: true, del: true, edit: false, search: false },
                //edit options
                {},
                //add options
                { width: 'auto', url: '@Url.Action("AddProduct","Home")' },
                //delete options
                { url: '@Url.Action("DeleteProduct","Home")' }
                );

        [HttpPost]
        public ActionResult DeleteProduct(string id)
        {
            //todo: Delete product
            return Json(true);
        }

        [HttpPost]
        public ActionResult AddProduct(Product postData)
        {
            //todo: Add product to repository
            return Json(true);
        }

        var lastSel;
        function inlineEdit() {
            $('input[name=rdEditApproach]').attr('disabled', true);
            $('#list').navGrid(
                '#pager',
                //enabling buttons
                { add: true, del: true, edit: false, search: false },
                //edit options
                {},
                //add options
                { width: 'auto', url: '@Url.Action("AddProduct","Home")' },
                //delete options
                { url: '@Url.Action("DeleteProduct","Home")' }
                );
            //add onSelectRow event to support inline edit
            $('#list').setGridParam({
                onSelectRow: function (id) {
                    if (id && id != lastSel) {
                        //save changes in row
                        $('#list').saveRow(lastSel, false);
                        lastSel = id;
                    }
                    //trigger inline edit for row
                    $('#list').editRow(id, true);
                }
            });
        };

        function formEdit() {
            $('input[name=rdEditApproach]').attr('disabled', true);
            $('#list').navGrid(
                '#pager',
                //enabling buttons
                { add: true, del: true, edit: true, search: false },
                //edit option
                {
                    width: 'auto', checkOnUpdate: true, checkOnSubmit: true,
                    beforeShowForm: function (form) {
                        centerDialog(form, $('#list'));
                    }
                },
                //add options
                {
                    width: 'auto', url: '@Url.Action("AddProduct","Home")',
                    reloadAfterSubmit: false, checkOnUpdate: true, checkOnSubmit: true,
                    beforeShowForm: function (form) {
                        centerDialog(form, $('#list'));
                    }
                },
                //delete options
                {
                    url: '@Url.Action("DeleteProduct","Home")', reloadAfterSubmit: false
                })
            .jqGrid('navButtonAdd', "#pager", {
                caption: "حذف ردیف‌های انتخابی", title: "Delete Toolbar", buttonicon: 'ui-icon ui-icon-trash',
                onClickButton: function () {
                    var idsList = jQuery("#list").jqGrid('getGridParam', 'selarrrow');
                    alert(idsList);
                    //jQuery("#list").jqGrid('delGridRow',idsList,{reloadAfterSubmit:false});
                }
            });
        };

        function centerDialog(form, grid) {
            var dlgDiv = $("#editmod" + grid[0].id);
            var parentDiv = dlgDiv.parent(); // div#gbox_list
            var dlgWidth = dlgDiv.width();
            var parentWidth = parentDiv.width();
            var dlgHeight = dlgDiv.height();
            var parentHeight = parentDiv.height();
            var parentTop = parentDiv.offset().top;
            var parentLeft = parentDiv.offset().left;
            dlgDiv[0].style.top =  Math.round(  parentTop  + (parentHeight-dlgHeight)/2  ) + "px";
            dlgDiv[0].style.left = Math.round(  parentLeft + (parentWidth-dlgWidth  )/2 )  + "px";
        }