ASP.NET easyUI--datagrid 通过ajax请求ASP.NET后台数据的分页查询

js前台对datagrid的定义代码，如下

                mygrid = $('#mytable').datagrid({
                    fit: true, //自动大小
                    height: 'auto',
                    rownumbers: true, //行号
                    fitColumns: true,
                    collapsible: true, //是否可折叠的
                    loadMsg: '数据装载中......',
                    singleSelect: true, //单行选取
                    pagination: true //显示分页
//                    columns: [[]]

                });
                //设置分页控件
                $("#mytable").datagrid('getPager').pagination({
                    beforePageText: "第",
                    afterPageText: "页",
                    displayMsg: "当前 {from} - {to}条数据   共{total} 条数据",
                    pageSize: 100,
                    pageList: [20, 30, 40, 50, 60, 70, 80, 90, 100],
                    onBeforeRefresh: function () {
                    },
                    onRefresh: function (pageNumber, pageSize) {
                    },
                    onChangePageSize: function () {
                    },
                    onSelectPage: function (pageNumber, pageSize) {
                        getData();
                    }
                });

js查询请求代码，如下：

                function getData() {
                    var param = "";
                    $(".mynon").each(function () {
                        if ($(this).attr("checked") == "checked")
                            param = param + "#" + $(this).attr("id");
                    });
                    if (param != "") {
                        var grid = $('#mytable');
                        var options = grid.datagrid('getPager').data("pagination").options; //选项
                        var pagenum = options.pageNumber; //页数
                        var total = options.total; //总数
                        var max = Math.ceil(total / options.pageSize);
                        var pagesize = options.pageSize; //每页行数

                        var sttime = $("#starttime").combobox('getText');
                        var ettime = $("#endtime").combobox('getText');
                        $.ajax({
                            type: "post",
                            url: "../frm/report.aspx/GetReport",
                            data: "{'begin':'" + sttime + "','end':'" + ettime + "','param':'" + param + "','pagenum':'" + pagenum + "','pagesize':'" + pagesize + "'}",
                            contentType: "application/json; charset=utf-8",
                            dataType: "json",
                            async: false,
                            success: function (data) {
                                var d = eval('(' + data.d + ')');
                                try {
                                    $('#mytable').datagrid("loadData", d);
                                } catch (e) {
                                    alert(e);
                                }
                            },
                            error: function (err) {
                                alert("错误代码：" + err.status);
                            }
                        });
                    }
                    else {
                        alert("请选择相应的设备!");
                    }
                }
            });

ASP.NET后台代码，如下图：

        [WebMethod]
        public static string GetReport(string begin, string end, string param, string pagenum, string pagesize)
        {
            string userID = HttpContext.Current.Session["userID"].ToString();
            string[] paras = param.Split('#');
            string measures = "'";
            ; i < paras.Length; i++)
            {
                measures = measures + "','" + paras[i];
            }
            measures = measures + "'";
            string beginTime = begin + ":00";
            string endTime = end + ":00";
            ;

            DataTable dt = drWater.BLL.infoManager.GetHistoryPageInfo(userID, beginTime, endTime, measures, pagenum, pagesize, out totalcount);
            List<json.dataItemJson> dataList = new List<json.dataItemJson>();
            if (dt != null)
            {
                )
                {
                    ; i < dt.Rows.Count; i++)
                    {
                        json.dataItemJson item = new json.dataItemJson();
......
                        item.status = dt.Rows[i]["status"].ToString();
                        dataList.Add(item);
                    }
                }
            }
            json.dataListJson dataListJson = new json.dataListJson();
            dataListJson.total = totalcount;
            dataListJson.rows = dataList;
            JavaScriptSerializer js = new JavaScriptSerializer();
            js.MaxJsonLength = int.MaxValue;
            string str = js.Serialize(dataListJson);
            return str;
        }

经过多次调试，返回的json字符串，虽然符合easyUi datagrid的数据格式标准，但是载入数据的时候出错！

使用eval转化json字符串之后，解决该问题！