DevExpress ChartControl ToolTipPointPattern和ToolTipSeriesPattern

原本只是想改一下鼠标放到曲线上的tip显示的小数点位数
然后就发现他这个属性还挺多，多到有点看不懂
然后就写了小demo测试

demo代码

// Create a series and add points to it. Series series1 = new Series("Series 1", ViewType.Line);series1.Points.Add(new SeriesPoint("A", new double[] { 4.1111 }));series1.Points.Add(new SeriesPoint("B", new double[] { 2.2222 }));series1.Points.Add(new SeriesPoint("C", new double[] { 17.7777 }));series1.Points.Add(new SeriesPoint("D", new double[] { 4.4444 }));series1.Points.Add(new SeriesPoint("E", new double[] { 17.7777 }));series1.Points.Add(new SeriesPoint("F", new double[] { 12.2222 }));series1.Points.Add(new SeriesPoint("G", new double[] { 15.5555 }));// Add the series to the chart. chartControl.Series.Add(series1); Disable a crosshair cursor. chartControl.CrosshairEnabled = DefaultBoolean.True; Enable chart tooltips.  chartControl.ToolTipEnabled = DefaultBoolean.True;  Specify the tooltip point pattern. series1.ToolTipPointPattern = "ToolTipPoint: {A}:{V:F2}";series1.ToolTipSeriesPattern = "ToolTipSeries: {A}:{V:F2}";series1.CrosshairLabelPattern = "CrosshairLabel: {A}:{V:F2}";

demo效果

demo结论

结论就很明显了，ToolTipPoint是鼠标放到点上才会显示出来的tip，CrosshairLabel是鼠标放到图上，它会十字线找到点，再显示出来。而最后ToolTipSeriesPattern是干嘛用的，怎样显示出来，我也还没摸清。

Pattern

附上官方的文档和例程

https://documentation.devexpress.com/WindowsForms/18052/Controls-and-Libraries/Chart-Control/Examples/End-User-Interaction/How-to-Use-Chart-Tooltips

using DevExpress.XtraCharts;
using System;
using System.Windows.Forms;
using DevExpress.Utils;namespace TooltipCustomization {public partial class Form1 : Form {public Form1() {InitializeComponent();}private void Form1_Load(object sender, EventArgs e) {// Create an empty chart. ChartControl chartControl = new ChartControl();// Add the chart to the form. chartControl.Dock = DockStyle.Fill;this.Controls.Add(chartControl);// Create a series and add points to it. Series series1 = new Series("Series 1", ViewType.Bar);series1.Points.Add(new SeriesPoint("A", new double[] { 4 }));series1.Points.Add(new SeriesPoint("B", new double[] { 2 }));series1.Points.Add(new SeriesPoint("C", new double[] { 17 }));series1.Points.Add(new SeriesPoint("D", new double[] { 4 }));series1.Points.Add(new SeriesPoint("E", new double[] { 17 }));series1.Points.Add(new SeriesPoint("F", new double[] { 12 }));series1.Points.Add(new SeriesPoint("G", new double[] { 15 }));// Add the series to the chart. chartControl.Series.Add(series1);// Disable a crosshair cursor. chartControl.CrosshairEnabled = DefaultBoolean.False;// Enable chart tooltips.  chartControl.ToolTipEnabled = DefaultBoolean.True;// Show a tooltip's beak ToolTipController controller = new ToolTipController();chartControl.ToolTipController = controller;controller.ShowBeak = true;// Change the default tooltip mouse position to relative position. ToolTipRelativePosition relativePosition = new ToolTipRelativePosition();chartControl.ToolTipOptions.ToolTipPosition = relativePosition;// Specify the tooltip relative position offsets.   relativePosition.OffsetX = 2;relativePosition.OffsetY = 2;// Specify the tooltip point pattern. series1.ToolTipPointPattern = "Bar Series: {A}:{V}";}}
}

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