Annotation Class

Reference

Definition

Namespace:: System.Windows.Forms.DataVisualization.Charting

Assembly:: System.Windows.Forms.DataVisualization.dll

Important

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Defines properties and methods common to all annotations. This is an abstract class.

public ref class Annotation abstract : System::Windows::Forms::DataVisualization::Charting::ChartNamedElement

public abstract class Annotation : System.Windows.Forms.DataVisualization.Charting.ChartNamedElement

type Annotation = class
    inherit ChartNamedElement

Public MustInherit Class Annotation
Inherits ChartNamedElement

Inheritance: Object

ChartElement

ChartNamedElement
Annotation

Derived: System.Windows.Forms.DataVisualization.Charting.AnnotationGroup

System.Windows.Forms.DataVisualization.Charting.ArrowAnnotation

System.Windows.Forms.DataVisualization.Charting.ImageAnnotation

System.Windows.Forms.DataVisualization.Charting.LineAnnotation

System.Windows.Forms.DataVisualization.Charting.PolylineAnnotation

More…

Remarks

Annotations are commonly used to comment or elaborate on chart elements such as data points. Annotations can also be used to draw custom shapes.

By default, annotations are positioned using relative coordinates, with (0,0) representing the top-left corner, and (100,100) representing the bottom-right corner of the chart image. It is also possible to switch from this relative coordinate system to a system that uses axis values. With an axis coordinate system, X and Y, which represent the position of the top-left corner of an annotation, are set using X axis and Y axis values, instead of values that range from 0-100.

There are two ways to use axis values when you specify the position and size of an annotation:

Set the AxisX, AxisY or both of these annotation properties to the AxisX and AxisY property values of a ChartArea object.
Use the AnchorDataPoint property to anchor the annotation to a data point. In this case, its positioning is automatically calculated.

All annotations are derived from the Annotation class, which can be used to set attributes common to all Annotation objects, such as color, position, anchoring and so forth.

Constructors

Annotation()

Initializes a new instance of the Annotation class. This is the parameterless constructor and should not be used.

Properties

Alignment	Gets or sets the content alignment of an annotation.
AllowAnchorMoving	Gets or sets a flag that specifies whether the end user is allowed to move the annotation anchor using a mouse.
AllowMoving	Gets or sets a flag that specifies whether the end user is allowed to move an annotation using a mouse.
AllowPathEditing	Gets or sets a flag that specifies whether the end user is allowed to move the points of a polygon annotation using a mouse.
AllowResizing	Gets or sets a flag that specifies whether the end user is allowed to resize an annotation using a mouse.
AllowSelecting	Gets or sets a flag that specifies whether the end user is allowed to select an annotation using a mouse.
AllowTextEditing	Gets or sets a flag that specifies whether the text in an annotation may be edited when the end user double clicks the text.
AnchorAlignment	Gets or sets the alignment of an annotation to the anchor point.
AnchorDataPoint	Gets or sets the data point to which an annotation is anchored.
AnchorDataPointName	Gets or sets the name of a data point to which an annotation is anchored.
AnchorOffsetX	Gets or sets the offset from the anchor point for the X position of an annotation.
AnchorOffsetY	Gets or sets the offset from the anchor point for the Y position of an annotation.
AnchorX	Gets or sets the X coordinate to which the annotation is anchored.
AnchorY	Gets or sets the Y coordinate to which the annotation is anchored.
AnnotationGroup	Gets the group, if any, to which the annotation belongs.
AnnotationType	Gets or sets an annotation's type name.
AxisX	Gets or sets the X axis to which an annotation is attached.
AxisXName	Gets or sets the name of the X axis to which an annotation is attached.
AxisY	Gets or sets the Y axis to which an annotation is attached.
AxisYName	Gets or sets the name of the Y axis which an annotation is attached to.
BackColor	Gets or sets the color of an annotation background.
BackGradientStyle	Gets or sets the gradient style of an annotation background.
BackHatchStyle	Gets or sets the hatching style of an annotation background.
BackSecondaryColor	Gets or sets the secondary color of an annotation background.
Bottom	Gets or sets the bottom boundary of an annotation position.
ClipToChartArea	Gets or sets the name of the chart area to which an annotation is clipped.
Font	Gets or sets the font to use for the text of an annotation.
ForeColor	Gets or sets the text color of an annotation.
Height	Gets or sets the height of an annotation.
IsSelected	Gets or sets a flag that determines if an annotation is selected.
IsSizeAlwaysRelative	Gets or sets a flag that specifies whether the size of an annotation is always defined in relative chart coordinates.
LineColor	Gets or sets the line color of an annotation.
LineDashStyle	Gets or sets the line style of an annotation.
LineWidth	Gets or sets the line width of an annotation.
Name	Gets or sets the unique name of an annotation.
Right	Gets or sets the right boundary position of an annotation.
ShadowColor	Gets or sets the color of an annotation's shadow.
ShadowOffset	Gets or sets the size of an annotation's shadow.
SmartLabelStyle	Gets or sets the smart label style of an annotation.
Tag	Gets or sets an object associated with this chart element. (Inherited from ChartElement)
TextStyle	Gets or sets the text style of an annotation.
ToolTip	Gets or sets the tooltip text for an annotation.
Visible	Gets or sets a flag that specifies whether an annotation is visible.
Width	Gets or sets the width, in pixels, of an annotation.
X	Gets or sets the X coordinate of an annotation.
Y	Gets or sets the Y coordinate of the annotation.
YAxisName	Gets or sets the name of the Y axis to which an annotation is attached.

Methods

BeginPlacement()	Begins the end user placement of an annotation using the mouse.
BringToFront()	Brings an annotation to the front of all annotations.
Dispose()	Releases the resources used by the ChartElement. (Inherited from ChartElement)
Dispose(Boolean)	Releases unmanaged resources and, optionally, managed resources.
EndPlacement()	Ends the end user placement of an annotation.
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)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ResizeToContent()	Resizes an annotation according to its content size.
SendToBack()	Sends an annotation to the back of all the annotations.
SetAnchor(DataPoint, DataPoint)	Anchors an annotation to two data points.
SetAnchor(DataPoint)	Anchors an annotation to the specified data point.
ToString()	Returns a string that represents the current Object. (Inherited from ChartElement)

Applies to

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