删除所选项（附加搜索部分的jquery）

<script>
                            $(document).ready(function() {
                                $("#info-grid").kendoGrid({
                                    dataSource: {
                                        type: "json",
                                        transport: {
                                            read: {
                                                url: "@Html.Raw(Url.Action("ListInfo", "GradeMessage"))",
                                                type: "POST",
                                                dataType: "json",
                                                data: additionalData
                                            }
                                        },
                                        schema: {
                                            data: "Data",
                                            total: "Total",
                                            errors: "Errors"
                                        },
                                        error: function(e) {
                                            display_kendoui_grid_error(e);
                                            // Cancel the changes
                                            this.cancelChanges();
                                        },
                                        pageSize: @(defaultGridPageSize),
                                        serverPaging: true,
                                        serverFiltering: true,
                                        serverSorting: true
                                    },
                                    pageable: {
                                        refresh: true,
                                        pageSizes: [@(gridPageSizes)]
                                    },
                                    editable: {

                                        confirmation:false,
                                        mode: "inline"
                                    },
                                    scrollable: false,
                                    columns: [ {//列配置
                                        field: "Id",//选择框
                                        headerTemplate: "<input id='mastercheckbox' type='checkbox'/>",
                                        headerAttributes: { style: "text-align:center" },
                                        attributes: { style: "text-align:center" },
                                        template: "<input type='checkbox' value='#=Id#' class='checkboxGroups'/>",
                                        width: 50
                                    },
                                    {
                                        field: "CompetitorName",
                                        title: "@T("Admin.GradeMessage.CompetitorName")",
                                        width:100,
                               
                                     {
                                         field: "Id",
                                         title: "@T("Admin.Common.Edit")",
                                         width: 100,
                                         template: '<a href="Edit/#=Id#">@T("Admin.Common.Edit")</a>'
                                     }
                                    ]
                                });
                            });

                        </script>

<script type="text/javascript">
                            var selectedIds = [];

                            $(document).ready(function () {
                                //search button
                                $('#search-info').click(function ()
                                {
                                    //search
                                    var grid = $('#info-grid').data('kendoGrid');

                                    grid.dataSource.page(1); //new search. Set page size to 1
                                    //grid.dataSource.read(); we already loaded the grid above using "page" function
                                    //clear selected checkboxes

                                    $('.checkboxGroups').attr('checked', false).change();

                                    selectedIds = [];

                                    return false;
                                });
                                // search CompetitorName
                                $("#@Html.FieldIdFor(model => model.CompetitorName)").keydown(function (event) {
                                    if (event.keyCode === 13) {
                                        $("#search-info").click();
                                        return false;
                                    }
                                });

                                //delete selected   
                                $('#delete-selected').click(function(e) {
                                    e.preventDefault();

                                    var postData = {
                                        selectedIds: selectedIds
                                    };
                                    addAntiForgeryToken(postData);

                                    $.ajax({
                                        cache: false,
                                        type: "POST",
                                        url: "@(Url.Action("DeleteSelected", "GradeMessage"))",
                                        data: postData,
                                        complete: function(data) {
                                            //reload grid
                                            var grid = $('#info-grid').data('kendoGrid');
                                            grid.dataSource.read();
                                        },
                                        error: function(xhr, ajaxOptions, thrownError) {
                                            alert(thrownError);
                                        },
                                        traditional: true
                                    });
                                    return false;
                                });

                                $('#mastercheckbox').click(function () {
                                    $('.checkboxGroups').attr('checked', $(this).is(':checked')).change();
                                });

                                //wire up checkboxes.
                                $('#info-grid').on('change', 'input[type=checkbox][id!=mastercheckbox]', function (e) {
                                    var $check = $(this);
                                    if ($check.is(":checked") == true) {
                                        var checked = jQuery.inArray($check.val(), selectedIds);
                                        if (checked == -1) {
                                            //add id to selectedIds.
                                            selectedIds.push($check.val());
                                        }
                                    }
                                    else {
                                        var checked = jQuery.inArray($check.val(), selectedIds);
                                        if (checked > -1) {
                                            //remove id from selectedIds.
                                            selectedIds = $.grep(selectedIds, function (item, index) {
                                                return item != $check.val();
                                            });
                                        }
                                    }
                                    updateMasterCheckbox();
                                });
                            });
                            //参赛者姓名搜索
                            function additionalData()
                            {
                                var data = {
                                    keyName: $('#@Html.FieldIdFor(model => model.CompetitorName)').val()
                                };
                                addAntiForgeryToken(data);
                                return data;
                            }

                            function onDataBound(e) {
                                $('#info-grid input[type=checkbox][id!=mastercheckbox]').each(function () {
                                    var currentId = $(this).val();
                                    var checked = jQuery.inArray(currentId, selectedIds);
                                    //set checked based on if current checkbox's value is in selectedIds.
                                    $(this).attr('checked', checked > -1);
                                });

                                updateMasterCheckbox();
                            }

                            function updateMasterCheckbox() 
                            {
                                var numChkBoxes = $('#info-grid input[type=checkbox][id!=mastercheckbox]').length;
                                var numChkBoxesChecked = $('#info-grid input[type=checkbox][id!=mastercheckbox]:checked').length;
                                $('#mastercheckbox').attr('checked', numChkBoxes == numChkBoxesChecked && numChkBoxes > 0);
                            }
                        </script>

      [HttpPost]
        public ActionResult DeleteSelected(ICollection<int> selectedIds)
        {
           

            if (selectedIds != null)
            {
                var selectd = _gradeMessageService.GetGradeMessagesByIdCollection(selectedIds.ToArray()).FirstOrDefault(p => p.EventId == p.EventSystemMessage.Id);//通过导航属性查询
                if (selectd != null)
                {
                    _gradeMessageService.DeleteGradeMessage(selectd);
                }

            }

            return Json(new { Result = true });
        }