Axis Class

Definition

Namespace:

System.Web.UI.DataVisualization.Charting

Assembly:

System.Web.DataVisualization.dll

Provides methods and properties that manage axes in the Chart control.

public ref class Axis : System::Web::UI::DataVisualization::Charting::ChartNamedElement, System::Web::UI::DataVisualization::Charting::IChartMapArea

public class Axis : System.Web.UI.DataVisualization.Charting.ChartNamedElement, System.Web.UI.DataVisualization.Charting.IChartMapArea

type Axis = class
    inherit ChartNamedElement
    interface IChartMapArea

Public Class Axis
Inherits ChartNamedElement
Implements IChartMapArea

Inheritance

Object

ChartElement

ChartNamedElement

Axis

Implements

IChartMapArea

Remarks

This class encapsulates all the functionality for axes in the Chart control, and is exposed by the AxisX, AxisY, AxisX2 and AxisY2 properties of ChartArea objects.

For all charts - except bar, stacked bar, pie and doughnut - the primary and secondary axes are as follows:

Axis Type	Description
Primary X-Axis	Bottom horizontal axis.
Secondary X-Axis	Top horizontal axis.
Primary Y-Axis	Left vertical axis.
Secondary Y-Axis	Right vertical axis.

Bar and stacked-bar charts have their axes rotated 90 degrees clockwise, so the primary X axis for these two chart types is the left-vertical axis.

Note There can be only one set of axes - two vertical and two horizontal - for each ChartArea object.

The Axis class also contains several methods that can be used to convert axis values to absolute pixel coordinates, which are useful for 2D custom drawing, or to relative coordinates, which are useful for 3D custom drawing. Absolute and relative coordinates can also be converted to axis values.

The following are the most important axis elements exposed by the Axis class:

Axis Element	Description
Axis Labels	The labels of an axis, and their associated properties.
Grid Lines	The major and minor grid lines of an axis.
Tick Marks	The major and minor tick marks of an axis.
Strip Lines	Strip lines.

Constructors

Axis()	Initializes a new instance of the Axis class.
Axis(ChartArea, AxisName)	Initializes a new instance of the Axis class with the specified ChartArea and axisTypeName values.

Properties

ArrowStyle	Gets or sets the arrow style of a two-dimensional (2D) axis; this style is not applied to three-dimensional (3D) chart areas.
AxisName	Gets the name of the axis, which can be either X, Y, X2 or Y2.
Crossing	Gets or sets the location at which an axis is crossed by its associated axis.
CustomLabels	Gets a CustomLabelsCollection object used to store CustomLabel objects.
Enabled	Gets or sets a value that indicates whether an axis is enabled.
InterlacedColor	Gets or sets the color of interlaced strip lines.
Interval	Gets or sets the interval of an axis.
IntervalAutoMode	Gets or sets a flag that determines if a fixed number of intervals is used on the axis, or if the number of intervals depends on the axis size.
IntervalOffset	Gets or sets the interval offset of an axis.
IntervalOffsetType	Gets or sets the interval offset type of an axis.
IntervalType	Gets or sets the interval type of an axis.
IsInterlaced	Gets or sets a flag that determines if interlaced strip lines are displayed for an axis.
IsLabelAutoFit	Gets or sets a flag that determines whether axis labels are automatically fitted.
IsLogarithmic	Gets or sets a flag which indicates whether the axis is logarithmic. Zeros or negative data values are not allowed on logarithmic charts.
IsMarginVisible	Gets or sets a flag that determines whether an axis margin will be used.
IsMarksNextToAxis	Gets or sets a flag that determines whether tick marks and axis labels move with an axis if the crossing point of an axis changes.
IsReversed	Gets or sets a flag which indicates whether the axis is reversed.
IsStartedFromZero	Gets or sets a flag which indicates whether the minimum value of the axis will be automatically set to zero if all data point values are positive. If there are negative data point values, the minimum value of the data points will be used.
LabelAutoFitMaxFontSize	Gets or sets the maximum font size that can be used by the label auto-fitting algorithm.
LabelAutoFitMinFontSize	Gets or sets the minimum font size that can be used by the label auto-fitting algorithm.
LabelAutoFitStyle	Gets or sets the allowable label changes that can be made to enable the label to be fit along an axis.
LabelStyle	Gets or sets the LabelStyle properties of an axis.
LineColor	Gets or sets the line color of an axis.
LineDashStyle	Gets or sets the line style of an axis.
LineWidth	Gets or sets the line width of an axis, in pixels.
LogarithmBase	Gets or sets a value for the logarithm base for the logarithmic axis.
MajorGrid	Gets or sets a Grid object used to set the major grid line properties for an axis.
MajorTickMark	Gets or sets a TickMark object used to set the major tick mark properties of an axis.
MapAreaAttributes	Gets or sets the map area attributes of an axis.
Maximum	Gets or sets the maximum value of an axis.
MaximumAutoSize	Gets or sets the maximum size of the axis, measured as a percentage of the chart area. This value is used by the automatic layout algorithm.
Minimum	Gets or sets the minimum value of an axis.
MinorGrid	Gets or sets a Grid object used to specify the minor grid lines attributes of an axis.
MinorTickMark	Gets or sets a TickMark object used to set the minor tick mark properties of an axis.
Name	Gets or sets the name of the axis.
PostBackValue	Gets or sets the postback value that can be processed on a Click event.
ScaleBreakStyle	Gets or sets the axis automatic scale break style.
ScaleView	Gets or sets the view of an axis.
StripLines	Gets a StripLinesCollection collection object, which stores all StripLine objects for an axis.
Tag	Gets or sets an object associated with this chart element. (Inherited from ChartElement)
TextOrientation	Gets or sets the orientation of the text in the axis title.
Title	Gets or sets the title of the axis.
TitleAlignment	Gets or sets the alignment of an axis title.
TitleFont	Gets or sets the title font properties of an axis.
TitleForeColor	Gets or sets the text color of an axis title.
ToolTip	Gets or sets the tooltip used for the axis.
Url	Gets or sets the URL target of the axis.

Methods

Dispose()	Releases the resources used by the ChartElement. (Inherited from ChartElement)
Dispose(Boolean)	Releases unmanaged and, optionally, managed resources.
Equals(Object)	Determines whether the specified Object is equal to the current ChartElement. (Inherited from ChartElement)
GetHashCode()	Returns a hash function for a particular type. (Inherited from ChartElement)
GetPosition(Double)	Converts an axis value to a relative position (0-100%). If an axis is logarithmic, the value is converted to a linear scale.
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
PixelPositionToValue(Double)	Converts an absolute pixel position along an axis to an axis value. This method only works in paint events.
PositionToValue(Double)	Converts a relative coordinate along an axis to an axis value. This method only works in paint events.
RoundAxisValues()	Automatically rounds axis values.
ToString()	Returns a string that represents the current Object. (Inherited from ChartElement)
ValueToPixelPosition(Double)	Converts an axis value to an absolute coordinate along an axis. Measured in pixels. This method only works in paint events.
ValueToPosition(Double)	Converts an axis value to its relative position (0-100%). If an axis has a logarithmic scale, the value is converted to a linear scale. This method only works in paint events.