dev linechart dynamic loading data

Picture Address: https: //blog.csdn.net/qq_33459369/article/details/80060196; (Pirates)

The next code is packaged

#region 动态折线图
        public LineChartHelper(ChartControl chart)
        {
            LineSeriesView lineSeriesView = new LineSeriesView();
            chart.SeriesTemplate.View = lineSeriesView;

            chart.Legend.AlignmentHorizontal = DevExpress.XtraCharts.LegendAlignmentHorizontal.Left;
            chart.Legend.AlignmentVertical = DevExpress.XtraCharts.LegendAlignmentVertical.TopOutside;
            chart.Legend.Direction = DevExpress.XtraCharts.LegendDirection.RightToLeft;

            XYDiagram diagram = (XYDiagram)chart.Diagram;
            diagram.AxisX.DateTimeScaleOptions.MeasureUnit = DateTimeMeasureUnit.Millisecond;
             // diagram.AxisX.DateTimeScaleOptions.GridAlignment = DateTimeGridAlignment.Minute; // set large scale intervals 
            diagram.AxisX.DateTimeScaleOptions.ScaleMode = ScaleMode.Continuous;
             // diagram.AxisX = to true .GridLines.MinorVisible;
             // diagram.AxisX.GridLines.Visible = to true;
             // diagram.AxisX.Label.TextPattern = @ "{A: HH: mm: SS}";
             // diagram.AxisX.Title. Text = @ "time";
             // diagram.AxisX.Title.Visible = to true;
             //diagram.AxisX.VisibleInPanesSerializable = "-1";
            //diagram.AxisY.Title.Visible = true;
            //diagram.AxisY.Title.Text = @"件数";
            //diagram.AxisY.VisibleInPanesSerializable = "-1";
        }

        public Series[] CreateSeries(ChartControl chart, List<string> names)
        {
            chart.Series.Clear();//清除Series
            int num = names.Count();
            Series[] series = new Series[num];
            for (int i = 0; i < num; i++)
            { 
                Series [I] = CreateSeries (names [I], ViewType.Line); 
            } 
            return Series; 
        } 
        ///  <Summary> 
        /// Create polyline
         ///  </ Summary> 
        Private Series CreateSeries ( String Caption, ViewType viewType ) 
        { 
            Series Series = new new Series (Caption, viewType);
             // be set ArgumentScaleType type, or converted to display the date format which is not a desirable format
             // That is, the character string display parameters must be set type is ScaleType.Qualitative 
            series.ArgumentScaleType = ScaleType.Qualitative;
            series.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True;//显示标注标签
            //回归线
            LineSeriesView lineSeriesView = new LineSeriesView();
            RegressionLine regressionLine = new RegressionLine();
            regressionLine.Name = caption + "1";
            lineSeriesView.Indicators.AddRange(new DevExpress.XtraCharts.Indicator[] { regressionLine });
            series.View = lineSeriesView;
            return series;
        }
        /// <Summary> 
        /// remove a Points not view the display data
         ///  </ Summary> 
        ///  <param name = "Series"> curve </ param> 
        ///  <param name = "the minDate"> Timeline </ param> 
        public  void RemovePoint (the DateTime the minDate, Series [] Series) 
        { 
            int pointsToRemoveCount = 0 ; // graph node data 
            the foreach (SeriesPoint Point in Series [ 0 ] .Points) 
            { 
                IF (point.DateTimeArgument < the minDate) 
                    pointsToRemoveCount + + ; 
            }
            if (pointsToRemoveCount < series[0].Points.Count)
            {
                pointsToRemoveCount--;
            }
            if (pointsToRemoveCount > 0)
            {
                for (int i = 0; i < series.Count(); i++)
                {
                    series[i].Points.RemoveRange(0, pointsToRemoveCount);
                }
            }
        }
        /// <summary>
        /// 添加数据到曲线节点
        /// </summary>
        public void AddPoints(Series series, string argument, double value)
        {
            if (series.View is LineSeriesView)
            {
                series.Points.Add(new SeriesPoint(argument, value));
            }
        }
        /// <summary>
        /// 设置x轴数据
        /// </summary>
        public void SetX(ChartControl chart, DateTime minDate, object argument)
        {
            XYDiagram diagram = (XYDiagram)chart.Diagram;
            if (diagram != null)
            {
                diagram.AxisX.WholeRange.SetMinMaxValues(minDate, argument);
            }
        }
        /// <summary>
        /// 获取曲线的回归线
        /// </summary>
        public RegressionLine GetRegressionLine(Series series)
        {
            if (series != null)
            {
                SwiftPlotSeriesView swiftPlotView = series.View as SwiftPlotSeriesView;
                if (swiftPlotView != null)
                {
                    Console.Write(swiftPlotView.Indicators);
                    foreach (Indicator indicator in swiftPlotView.Indicators)
                    {
                        RegressionLine regressionLine = indicator as RegressionLine;
                        if (regressionLine != null)
                            return regressionLine;
                    }
                }
            }
            return null;
        }
        #endregion

Calling code

        private readonly Random random = new Random();
        private Series[] _series;
        private LineChartHelper _lineChartHelper;
        private int _num = 0;

        public frmRealtimeLineChart()
        {
            InitializeComponent();

        }

        private void frmRealtimeLineChart_Load(object sender, EventArgs e)
        {
            Init();
        }

        private void Init()
        {
            _lineChartHelper = new LineChartHelper(chart);
            List<string> names = new List<string>() { "曲线一", "折线二", "数字三" };
            _series = _lineChartHelper.CreateSeries(chart, names);
            _num = names.Count();
            chart.SeriesSerializable = _series;

            XYDiagram diagram = (XYDiagram)chart.Diagram;
            diagram.AxisX.GridLines.MinorVisible = true;
            diagram.AxisX.GridLines.Visible = true;
            //diagram.AxisX.Label.TextPattern = "@{A:HH:mm:ss}";
            diagram.AxisX.Title.Font = new System.Drawing.Font("Tahoma", 9F);
            diagram.AxisX.Title.Text = @"时间(分)";
            diagram.AxisX.Title.Visible = true;
            diagram.AxisX.VisibleInPanesSerializable = "-1";

            diagram.AxisX.WholeRange.Auto = true;
            diagram.AxisX.WholeRange.SideMarginsValue = 1;
            diagram.AxisX.Interlaced = true;
            diagram.AxisY.WholeRange.AlwaysShowZeroLevel = false;

            diagram.AxisY.Title.Font = new System.Drawing.Font("Tahoma", 9F);
            diagram.AxisY.Title.Text = @"随机数";
            diagram.AxisY.Title.Visible = true;
            diagram.AxisY.VisibleInPanesSerializable = "-1";
        }

        private void timer_Tick(object sender, EventArgs e)
        {
            RealtimeChart();
        }

        private void RealtimeChart()
        {
            try
            {
                DateTime argument = DateTime.Now;//x轴
                for (int i = 0; i < _num; i++)
                {
                    _lineChartHelper.AddPoints(_series[i], argument.ToString(), CalculateNextValue());
                }
                DateTime minDate Argument.AddSeconds = (-TimeInterval); // X-axis curvature time 
                _lineChartHelper.RemovePoint (the minDate, _series); 
                _lineChartHelper.SetX (Chart, the minDate, argument); 
            } 
            the catch (Exception EX) 
            { 
                Console.Write (EX); 
            } 
        } 

        ///  <Summary> 
        /// random number
         ///  </ Summary> 
        Private  Double CalculateNextValue () 
        { 
            return Math.Round (random.NextDouble () * 100.0 ); 
        } 

        ///  <Summary> 
        /// Intervals
        /// </summary>
        private int TimeInterval { get { return Convert.ToInt32(spnTimeInterval.EditValue); } }

Chart drag directly, select line chart, the following effects:

Unresolved issues:

Problems x-axis time format: diagram.AxisX.Label.TextPattern = "{A: HH: mm: ss}"; do not know why such setting does not work,