您的Ajax调用将会

$("#linkId").on('click', function (event) {
            var url = "GetList";
            $.ajax({
                data: {},
                type: 'POST',
                cache: false,
                dataType: 'json',
                url: url,
                success: function (result) {
                    $("#dropDownId").empty();
                    $("#dropDownId").append('<option value="">Select One</option>');
                    $.each(result, function (i, item) {
                        $("#AddItemItemId").append('<option value="' + item.Value + '">' +
                            item.Text + '</option>');
                        // here we are adding option for States
                    });
                },
                error: function (ex) {
                    alertify.alert('We face some technical difficulties. Hello World');
                }
            });
            event.preventDefault(event);
        });

和后端C#代码会喜欢

[HttpPost]
    public JsonResult GetList()
    {

        var itemlist = _itemManager.GetItems();
        var itemList = itemlist.Select(item => new SelectListItem { Text = item.ItemName+" - "+item.PowerName, Value = Convert.ToString(item.Id) }).ToList();
        return Json(new SelectList(itemList, "Value", "Text"));
    }

希望这会对您有所帮助.编码愉快

Hope this will help you. Happy coding