这个示例展示了如何让系列点标签显示自定义信息，特别是根据系列点的取值。

C#	复制代码
using System; using System.Windows.Forms; using DevExpress.XtraCharts; // ... private void chartControl1_CustomDrawSeriesPoint(object sender, CustomDrawSeriesPointEventArgs e) { if(e.SeriesPoint.Values[0] > 1) { e.LabelText = "Critical value"; } }

复制代码

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void chartControl1_CustomDrawSeriesPoint(object sender, 
CustomDrawSeriesPointEventArgs e) {
    if(e.SeriesPoint.Values[0] > 1) {
        e.LabelText = "Critical value";
    }
}

Visual Basic	复制代码
Imports System Imports System.Windows.Forms Imports DevExpress.XtraCharts ' ... Private Sub chartControl1_CustomDrawSeriesPoint(ByVal sender As Object, _ ByVal e As CustomDrawSeriesPointEventArgs) Handles chartControl1.CustomDrawSeriesPoint If e.SeriesPoint.Values(0) > 1 Then e.LabelText = "Critical value" End If End Sub

Visual Basic

复制代码

Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ...

Private Sub chartControl1_CustomDrawSeriesPoint(ByVal sender As Object, _ 
ByVal e As CustomDrawSeriesPointEventArgs) Handles chartControl1.CustomDrawSeriesPoint
    If e.SeriesPoint.Values(0) > 1 Then
        e.LabelText = "Critical value"
    End If
End Sub

在下面的插图中显示了结果。

参阅