plotModel = new PlotModel()            {                Title = "数据统计",                LegendTitle = "Max:红色，Min:黄色",                LegendOrientation = LegendOrientation.Horizontal,                LegendPlacement = LegendPlacement.Inside,                LegendPosition = LegendPosition.TopRight,                LegendBackground = OxyColor.FromAColor(200, OxyColors.Beige),                LegendBorder = OxyColors.Black,                DefaultFont = "微软雅黑",            };            #region X，Y轴            //X轴            var _dateAxis = new DateTimeAxis()            {                MajorGridlineStyle = LineStyle.Solid,                MinorGridlineStyle = LineStyle.Dot,                IntervalLength = 80,                IsZoomEnabled = false,                IsPanEnabled = false,                StringFormat = "M/d HH:mm:ss",                Title = "时间"            };            plotModel.Axes.Add(_dateAxis);            //Y轴            var _valueAxis = new LinearAxis()            {                Title = "数值",                Maximum = usl + usl / 4,                Minimum = lsl - lsl / 3,                MajorGridlineStyle = LineStyle.Solid,//主刻度设置格网                MinorGridlineStyle = LineStyle.Dot,//子刻度设置格网样式                IntervalLength = 80,                Angle = 60,                IsZoomEnabled = true,//坐标轴缩放                IsPanEnabled = true,//图表缩放功能                 Position = AxisPosition.Left,            };            plotModel.Axes.Add(_valueAxis);            #endregion            #region 线条            //动态线条            var lineSerial = new LineSeries()            {                Title = SvidSelected.ParaName,//eqpParam name                Color = OxyColors.Black,                Smooth = true,                MarkerType = MarkerType.Circle,                StrokeThickness = 0,                MarkerSize = 1,                MarkerStroke = OxyColors.BlueViolet,            };            plotModel.Series.Add(lineSerial);            Task.Factory.StartNew(() =>               {                   for (int i = 0; i < resData.Count; i++)                   {                       lineSerial.Points.Add(DateTimeAxis.CreateDataPoint(resData[i].occurenceTime, resData[i].val));                       plotModel.InvalidatePlot(true); //每秒刷新一次视图                        //Thread.Sleep(200);                   }                   sw.Stop();                   TotalDate = "总渲染时间(毫秒):" + sw.ElapsedMilliseconds;//sw.ElapsedTicks / (decimal)Stopwatch.Frequency;               });            #endregion            #region 上限，下限，中线            //添加标注线            var lineMaxAnnotation = new LineAnnotation()            {
    //上限                Type = LineAnnotationType.Horizontal,                Y = usl,                Text = "上限:" + usl,                Color = OxyColors.Red,                LineStyle = LineStyle.DashDashDot,                StrokeThickness = 2            };            plotModel.Annotations.Add(lineMaxAnnotation);            var lineMinAnnotation = new LineAnnotation()            {
    //下限                Type = LineAnnotationType.Horizontal,                Color = OxyColors.Blue,                LineStyle = LineStyle.Dash,                StrokeThickness = 2,                Y = lsl,                Text = "下限:" + lsl            };            plotModel.Annotations.Add(lineMinAnnotation);            var lineMean = new LineAnnotation()            {
    //平均                Type = LineAnnotationType.Horizontal,                Color = OxyColors.Green,                LineStyle = LineStyle.LongDash,                StrokeThickness = 2,                Y = mean,                Text = "平均:" + mean            };            plotModel.Annotations.Add(lineMean);            #endregion            #region 最大值，最小值            var min = new ScatterSeries();            var maxDataPoint = DateTimeAxis.CreateDataPoint(maxPoint.occurenceTime, maxPoint.val);            min.Points.Add(new ScatterPoint(maxDataPoint.X, maxDataPoint.Y, 15));            min.MarkerFill = OxyColor.FromAColor(20, OxyColors.Red);            min.MarkerType = MarkerType.Circle;            plotModel.Series.Add(min);            var max = new ScatterSeries();            var minDataPoint = DateTimeAxis.CreateDataPoint(minPoint.occurenceTime, minPoint.val);            max.Points.Add(new ScatterPoint(minDataPoint.X, minDataPoint.Y, 15));            max.MarkerFill = OxyColor.FromAColor(20, OxyColors.Yellow);            max.MarkerType = MarkerType.Circle;            plotModel.Series.Add(max);            #endregion