corelibraries-devexpress-dot-xtracharts-dot-axislabelitembase-f701f97f.md
Provides access to the axis to which an axis label item belongs.
Namespace : DevExpress.XtraCharts
Assembly : DevExpress.XtraCharts.v25.2.dll
NuGet Package : DevExpress.Charts
[XtraChartsLocalizableCategory(XtraChartsCategory.Misc)]
public AxisBase Axis { get; }
<XtraChartsLocalizableCategory(XtraChartsCategory.Misc)>
Public ReadOnly Property Axis As AxisBase
| Type | Description |
|---|---|
| AxisBase |
An AxisBase descendant, which identifies the axis.
|
An axis label item is the specific instance of the AxisLabelItem class, obtained in the ChartControl.CustomDrawAxisLabel (or WebChartControl.CustomDrawAxisLabel) event handler.
For more information, refer to Axis Labels.
Apart from the capability to customize the overall appearance of axis labels, you can obtain individual axis labels at runtime. Then, it’s possible to apply all the options available for axis labels to them, individually. For example, based on some criteria (e.g. an axis value threshold), you can apply different formatting to axis labels.
For this, the special ChartControl.CustomDrawAxisLabel event is introduced. Handle it to obtain axis labels.
Note
For the WebChartControl you should handle its WebChartControl.CustomDrawSeries event to implement this task.
The following code demonstrates one possible implementation of this capability.
private void chartControl1_CustomDrawAxisLabel(object sender, CustomDrawAxisLabelEventArgs e) {
AxisBase axis = e.Item.Axis;
if (axis is AxisY || axis is AxisY3D || axis is RadarAxisY) {
double axisValue = (double)e.Item.AxisValue;
if (axisValue < 0) {
e.Item.TextColor = Color.Red;
}
else if (axisValue > 0) {
e.Item.Text = "+" + e.Item.Text;
e.Item.TextColor = Color.Green;
}
else if (axisValue == 0) {
e.Item.Text = "Zero";
}
}
}
Private Sub chartControl1_CustomDrawAxisLabel(sender As Object, e As CustomDrawAxisLabelEventArgs)
Dim axis As AxisBase = e.Item.Axis
If TypeOf axis Is AxisY Or TypeOf axis Is AxisY3D Or TypeOf axis Is RadarAxisY Then
Dim axisValue As Double = CDbl(e.Item.AxisValue)
If axisValue < 0 Then
e.Item.TextColor = Color.Red
Else
If axisValue > 0 Then
e.Item.Text = "+" + e.Item.Text
e.Item.TextColor = Color.Green
Else
If axisValue = 0 Then
e.Item.Text = "Zero"
End If
End If
End If
End If
End Sub
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Axis property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
winforms-charts-how-to-individually-customize-axis-labels/CS/CustomAxisLabels/Form1.cs#L13
private void chartControl1_CustomDrawAxisLabel(object sender, CustomDrawAxisLabelEventArgs e) {
AxisBase axis = e.Item.Axis;
if (axis is AxisY || axis is AxisY3D || axis is RadarAxisY) {
winforms-charts-how-to-individually-customize-axis-labels/VB/CustomAxisLabels/Form1.vb#L16
Private Sub chartControl1_CustomDrawAxisLabel(ByVal sender As Object, ByVal e As CustomDrawAxisLabelEventArgs)
Dim axis As AxisBase = e.Item.Axis
If TypeOf axis Is AxisY OrElse TypeOf axis Is AxisY3D OrElse TypeOf axis Is RadarAxisY Then
See Also