dev linechart动态加载数据
作者：互联网
图片地址：https://blog.csdn.net/qq_33459369/article/details/80060196；（盗图）
接下来是封装的代码
#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;//设置大刻度的间隔
diagram.AxisX.DateTimeScaleOptions.ScaleMode = ScaleMode.Continuous;
//diagram.AxisX.GridLines.MinorVisible = true;
//diagram.AxisX.GridLines.Visible = true;
//diagram.AxisX.Label.TextPattern = @"{A:HH:mm:ss}";
//diagram.AxisX.Title.Text = @"时间";
//diagram.AxisX.Title.Visible = 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>
/// 创建折线
/// </summary>
private Series CreateSeries(string caption, ViewType viewType)
{
Series series = new Series(caption, viewType);
//必须设置ArgumentScaleType的类型，否则显示会转换为日期格式，导致不是希望的格式显示
//也就是说，显示字符串的参数，必须设置类型为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>
/// 移除不在视图显示的Points数据
/// </summary>
/// <param name="series">曲线</param>
/// <param name="minDate">时间线</param>
public void RemovePoint(DateTime minDate, Series[] series)
{
int pointsToRemoveCount = 0;//曲线节点数据
foreach (SeriesPoint point in series[0].Points)
{
if (point.DateTimeArgument < 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
调用代码
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轴时间曲度
_lineChartHelper.RemovePoint(minDate, _series);
_lineChartHelper.SetX(chart, minDate, argument);
}
catch (Exception ex)
{
Console.Write(ex);
}
}
/// <summary>
/// 随机数
/// </summary>
private double CalculateNextValue()
{
return Math.Round(random.NextDouble() * 100.0);
}
/// <summary>
/// 间隔时间
/// </summary>
private int TimeInterval { get { return Convert.ToInt32(spnTimeInterval.EditValue); } }
直接拖入chart，选择折线图，效果如下：
未解决问题：
x轴的时间格式问题：diagram.AxisX.Label.TextPattern = "{A:HH:mm:ss}";不知道为啥这样设置不起作用，
标签：linechart,series,AxisX,chart,dev,diagram,Series,new,加载 来源： https://www.cnblogs.com/shuaimeng/p/10948655.html