XtraCharts > 示例 > 如何：有条件地隐藏系列标签

这个示例展示了如何有条件地隐藏图表的系列标签。要这样做，则应接管 ChartControl.CustomDrawSeriesPoint 事件，然后可以修改 CustomDrawSeriesPointEventArgs.LabelText 参量的值。

注意
对于 WebChartControl，应该接管 WebChartControl.CustomDrawSeriesPoint 事件来完成此任务。

C#	复制代码
using System; using System.Windows.Forms; using DevExpress.XtraCharts; // ... private void chart_CustomDrawSeriesPoint (object sender, CustomDrawSeriesPointEventArgs e) { // If the value is less than 1, hide the point's label. if(e.SeriesPoint[0] < 1) { e.LabelText = ""; } }

复制代码

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

private void chart_CustomDrawSeriesPoint (object sender, CustomDrawSeriesPointEventArgs e) {
    // If the value is less than 1, hide the point's label.
    if(e.SeriesPoint[0] < 1) {
        e.LabelText = "";
    }
}

Visual Basic	复制代码
Imports System Imports System.Windows.Forms Imports DevExpress.XtraCharts ' ... Private Sub chart_CustomDrawSeriesPoint (ByVal sender As Object, _ ByVal e As CustomDrawSeriesPointEventArgs) ' If the value is less than 1, hide the point's label. If e.SeriesPoint(0) < 1 Then e.LabelText = "" End If End Sub

Visual Basic

复制代码

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

Private Sub chart_CustomDrawSeriesPoint (ByVal sender As Object, _
ByVal e As CustomDrawSeriesPointEventArgs)
    ' If the value is less than 1, hide the point's label.
    If e.SeriesPoint(0) < 1 Then
        e.LabelText = ""
    End If
End Sub

Show Me
在 DevExpress Code Central 数据库中可以找到完整的示例项目，网址是 http://www.devexpress.com/example=E452。取决于目标平台类型 (ASP.NET、WinForms 等)，可以在线运行本示例，或者下载自动可执行的示例。

参阅