jqGrid动态增加列，使用在根据条件筛选而出现不同的列的场景

 function GetGrid2() {

        var jqdata = [

            { Encode:"20180100", FullName: "BYD", SpecType: "cpu200", UnitName: "台", SecondUnit: "", Qty: "10", UnitCode: "50000", Cost: "35000" },

            { Encode:"20180100", FullName: "BYD", SpecType: "cpu200", UnitName: "台", SecondUnit: "", Qty: "10", UnitCode: "50000", Cost: "35000" }

        ];

        //创建jqGrid组件

        var $gridTable = $('#gridTable');

       //固定列

        var model = [

            { label: "商品编号", name: "Encode", width: 100, align: 'left', sortable: false },

            { label: "商品名称", name: "FullName", width: 130, align: "left", sortable: false },

            { label: "规格型号", name: "SpecType", width: 150, align: 'left', sortable: false },

            { label: "单位", name: "UnitName", width: 150, align: 'left', sortable: false },

            { label: "副单位", name: "SecondUnit", width: 150, align: 'left', sortable: false },

            { label: "基本数量", name: "Qty", width: 150, align: 'left', sortable: false },

            { label: "单位成本", name: "UnitCode", width: 150, align: 'left', sortable: false },

            { label: "成本", name: "Cost", width: 150, align: 'left', sortable: false }];

        //动态列

        var addmodel = [{ label: "基本数量", name: "SHQty", width: 150, align: 'left', sortable: false }, { label: "可用库存", name: "SHRealQty", width: 150, align: 'left', sortable: false }];

        $.each(addmodel, function (key, value) {

            model.push({

                label: value.label,

                name: value.name,

                index: key,

                width: value.width,

                align: value.align,

                sortable: value.sortable

            });

        });

        //创建jqGrid组件

        $gridTable.jqGrid(

            {

                datatype: "json",

                height: $(window).height() - 230.5,

                autowidth: true,

                colModel: model,

                pager: false,

                rownumbers: true,

                shrinkToFit: false,

                gridview: true,

                footerrow: true,

                sortname: 'ExecutionDate',

                sortorder: 'desc',

                beforeRequest: function () {

                    $("thead th").css("text-align", "center").css("font-weight", "bold");

                },

                gridComplete: function () {

                    var totalreceivable = $(this).getCol("Receivable", false, "sum");

                    var totalexpenses = $(this).getCol("Expenses", false, "sum");

                    var totalbalance = $(this).getCol("Balance", false, "sum");

                    //合计

                    $(this).footerData("set", {

                        "ExecutionDate": "合计：",

                        "Receivable": totalreceivable,

                        "Expenses": totalexpenses,

                        "Balance": totalbalance

                    });

                    $('table.ui-jqgrid-ftable td').prevUntil().css("border-right-color", "#fff");

                }

            });

        //将jqdata的值循环添加进jqGrid

        for (var i = 0; i <= jqdata.length; i++) {

            $gridTable.jqGrid('addRowData', i + 1, jqdata[i]);

        }

        //固定表头合并

        var groupHeaders = [

            { startColumnName: 'Qty', numberOfColumns: 3, titleText: '<div align="center"><b>所有仓库</b></div>' }

        ];

        //动态表头

        if (1 == 1) {

            groupHeaders.push({ startColumnName: 'SHQty', numberOfColumns: 2, titleText: '<div align="center"><b>上海仓库</b></div>' });

        }

        $gridTable.jqGrid('setGroupHeaders', {

            useColSpanStyle: true,

            groupHeaders: groupHeaders

        });

    }