How to add an alert label to the chart?
Scenario: In a chart, you want to show a label with an alert every time a value surpasses a defined threshold.
Solution: Replicate the procedure in the previous section, using the function:
private void ChangeLabelText(object sender, DevExpress.XtraCharts.CustomDrawSeriesPointEventArgs e) {
var value = Convert.ToDouble(e.SeriesPoint.Values[0]);
e.LabelText = "";
if(value>80)
{
e.SeriesDrawOptions.Color = Color.FromArgb(4, 110, 4);
e.LabelText = "Yeah!";
}
}
The output will be:
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