ASP.NET Highcharts图表

js 图表代码，如下:

charts[i] = new Highcharts.Chart({
                chart: {
                    backgroundColor: {
                        linearGradient: [0, 0, 500, 500],
                        stops: [
                                [0, 'rgb(255, 255, 255)'],
                                [1, 'rgb(200, 200, 255)']
                            ]
                    },
                    renderTo: 'container' + i,
                    type: 'spline'
                },
                title: {
                    text: "实时数据监测"
                },
                xAxis: {
                    title: {
                        text: '采集时间'
                    },
                    type: 'datetime',
                    tickPixelInterval: 120

                },
                yAxis: {
                    title: {
                        text: '数据值'
                    }
                },
                tooltip: {
                    enabled: true,
                    formatter: function () {
                        return '<b>' + this.series.name + '</b><br/>'
                            + Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x)
                            + '<br/>' + Highcharts.numberFormat(this.y, 2);
                    }
                },
                legend: {
                    enabled: true,
                    layout: 'vertical',
                    backgroundColor: '#FFFFFF',
                    floating: true,
                    align: 'left',
                    x: 100,
                    verticalAlign: 'top',
                    y: 70
                },
                exporting: {
                    enabled: false,
                    url: "highcharts_export.aspx"
                },
                series: [
                    {
                        name: $("#container" + i).attr("name"),
                        data: []
                    }
                    ]
            });

js图表载入点数据，代码如下：

var measureIDID = $("#container" + i).attr("mydefineid");
            $.ajax({
                type: "post",
                url: "../frm/realTimeChart.aspx/GetRealTimeChart",
                data: "{'id':'" + measureIDID + "'}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                async: true,
                success: function (data) {
                    var datainfo = [];
                    if (data.d != "") {
                        datainfo = eval('(' + data.d + ')');
                    }
                    if (datainfo.length > 0) {
                        for (var j in datainfo) {
                            var r = datainfo[j];
                            charts[i].series[0].addPoint(r, true, false);
                        }
                    }
                },
                error: function (err) {
                    alert("错误代码：" + err.status);
                }
            });

ASP.NET后台代码，如下：

        [WebMethod]
        public static string GetRealTimeChart(string id)
        {
            string userID = HttpContext.Current.Session["userID"].ToString();
            List<drWater.Models.info> infoList = (List<drWater.Models.info>)drWater.BLL.infoManager.GetRealTimeView(userID, id, ");
            if (infoList != null)
            {
                )
                {
                    return ToJson(infoList);
                }
            }
            return "";
        }
        private static string ToJson(List<drWater.Models.info> infoList)
        {
            System.Web.Script.Serialization.JavaScriptSerializer javaScriptSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();
            javaScriptSerializer.MaxJsonLength = Int32.MaxValue; //取得最大数值
            System.Collections.ArrayList arrayList = new System.Collections.ArrayList();
            ; i < infoList.Count; i++)
            {
                System.Collections.ArrayList arrayItem = new System.Collections.ArrayList();
                arrayItem.Add(DateTimeToUTC(infoList[i].UpdateTime));
                arrayItem.Add(infoList[i].Val);
                arrayList.Add(arrayItem);
            }
            return javaScriptSerializer.Serialize(arrayList);  //返回一个json字符串
        }
        private static double DateTimeToUTC(System.DateTime time)
        {
            ;
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(, , ));
            intResult = (time - startTime).TotalMilliseconds;
            return intResult;
        }

ASP.NET后台经过转化为UTC时间，经过多次尝试，虽然返回的json字符串格式符合Highcharts的数据格式，但是出现的曲线有缺陷！

使用addPoint方法，挨个添加点数据之后，解决！