AxisScaleChangedEventArgs.Axis Property

Returns the axis whose scale mode, measure unit, grid alignment or grid spacing has been changed.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v22.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

public AxisBase Axis { get; }

VB.NET

Public ReadOnly Property Axis As AxisBase

Property Value

Type	Description
AxisBase	The axis whose scale parameters have been changed.

Example

Use the ChartControl.AxisScaleChanged (WebChartControl.AxisScaleChanged) event to obtain the axis‘ automatically calculated grid alignment and measurement unit values, when the scale mode is automatic. Moreover the event arguments contains the axis itself. This event is raised when the scale mode, measure unit, grid alignment or grid spacing of the axis scale has been changed.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-obtain-values-calculated-for-automatic-axis-date-time-scale-modes-e1529

Form1.cs

private void Form1_Load(object sender, EventArgs e) {
    chartControl1.AxisScaleChanged += OnChartAxisScaleChanged;
}

private void OnChartAxisScaleChanged(object sender, AxisScaleChangedEventArgs e) {
    AxisX axisX = e.Axis as AxisX;
    if (axisX == null) return;
    // In this event, you can access the properties of the corresponding axis, and
    // obtain the automatically calculated value for the axis date-time grid alignment and measure unit.
    axisX.Title.Visibility = DefaultBoolean.True;
    axisX.Title.Text = String.Format(
        "The Axis Grid Alignment Unit is {0} \r\nThe Axis Measure Unit is {1}", 
        e.Axis.DateTimeScaleOptions.GridAlignment.ToString(),
        e.Axis.DateTimeScaleOptions.MeasureUnit.ToString()
    );
}

Form1.vb

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    AddHandler chartControl1.AxisScaleChanged, AddressOf OnChartAxisScaleChanged
End Sub

Private Sub OnChartAxisScaleChanged(ByVal sender As Object, ByVal e As AxisScaleChangedEventArgs)
    Dim axisX As AxisX = TryCast(e.Axis, AxisX)
    If axisX Is Nothing Then
        Return
    End If
    ' In this event, you can access the properties of the corresponding axis, and
    ' obtain the automatically calculated value for the axis date-time grid alignment and measure unit.
    axisX.Title.Visibility = DefaultBoolean.True
    axisX.Title.Text = String.Format("The Axis Grid Alignment Unit is {0} " & ControlChars.CrLf & "The Axis Measure Unit is {1}", e.Axis.DateTimeScaleOptions.GridAlignment.ToString(), e.Axis.DateTimeScaleOptions.MeasureUnit.ToString())
End Sub

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references 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.

C#

winforms-dashboards-how-to-use-custom-axis-grid-settings-in-the-chart-item-t597206/CS/DesignerSample/Form1.cs#L32

{
    if (e.Axis is SecondaryAxisY)
    {

how-to-obtain-values-calculated-for-automatic-axis-date-time-scale-modes-e1529/CS/MainForm.cs#L17

private void OnAxisScaleChanged(object sender, AxisScaleChangedEventArgs e) {
    AxisX axis = e.Axis as AxisX;
    DateTimeScaleChangedEventArgs args = e as DateTimeScaleChangedEventArgs;

VB.NET

winforms-dashboards-how-to-use-custom-axis-grid-settings-in-the-chart-item-t597206/VB/DesignerSample/Form1.vb#L28

Private Sub ChartControl_AxisScaleChanged(ByVal sender As Object, ByVal e As AxisScaleChangedEventArgs)
    If TypeOf e.Axis Is SecondaryAxisY Then
        If e.GridSpacingChange.NewValue<1 Then

how-to-obtain-values-calculated-for-automatic-axis-date-time-scale-modes-e1529/VB/MainForm.vb#L19

Private Sub OnAxisScaleChanged(ByVal sender As Object, ByVal e As AxisScaleChangedEventArgs) Handles chartControl.AxisScaleChanged
    Dim axis As AxisX = TryCast(e.Axis, AxisX)
    Dim args As DateTimeScaleChangedEventArgs = TryCast(e, DateTimeScaleChangedEventArgs)