ArrowHeadKey Property

In This Topic

Gets and sets the arrowhead key for the respective arrow head marker from the DefaultArrowStyleName

Syntax

C#
Visual Basic (Declaration)

public string ArrowHeadKey {get; set;}

Public Property ArrowHeadKey As String

Exceptions

Exception	Description
System.InvalidOperationException

Remarks

Supported arrowhead keys are in the DefaultArrowHeadKeys collection. The arrowhead key controls the style of arrowhead to be created. Currently arrowhead keys are limited to the arrowhead keys found in DefaultArrowStyleName. The arrowhead automatically defaults to DefaultArrowHeadKey unless it is set to a different value (from the DefaultArrowHeadKeys list). Attempting to set ArrowHeadKey to a key value not within the DefaultArrowHeadKeys collection will throw an System.InvalidOperationException

Example

Create Arrow Graphic

//Must be on QueuedTask.Run(() => { ...

//Build geometry
List<Coordinate2D> plCoords = new List<Coordinate2D>();
plCoords.Add(new Coordinate2D(1, 8.5));
plCoords.Add(new Coordinate2D(1.66, 9));
plCoords.Add(new Coordinate2D(2.33, 8.1));
plCoords.Add(new Coordinate2D(3, 8.5));
Polyline linePl = PolylineBuilderEx.CreatePolyline(plCoords);

//Set up the arrow info
var arrowInfo = new ArrowInfo()
{
  ArrowHeadKey = ArrowInfo.DefaultArrowHeadKeys[1],
  ArrowOnBothEnds = true,
  ArrowSizePoints = 30,
  LineWidthPoints = 15
};

var graphic = GraphicFactory.Instance.CreateArrowGraphic(linePl, arrowInfo);

//Make an element to add to GraphicsLayer or Layout
//var ge = ElementFactory.Instance.CreateGraphicElement(
//  container, graphic, "Arrow Line", false);

Create Line Arrow Element

//Must be on QueuedTask.Run(() => { ...

//Build geometry
List<Coordinate2D> plCoords = new List<Coordinate2D>();
plCoords.Add(new Coordinate2D(1, 8.5));
plCoords.Add(new Coordinate2D(1.66, 9));
plCoords.Add(new Coordinate2D(2.33, 8.1));
plCoords.Add(new Coordinate2D(3, 8.5));
Polyline linePl = PolylineBuilderEx.CreatePolyline(plCoords);

var arrowInfo = new ArrowInfo()
{
  ArrowHeadKey = ArrowInfo.DefaultArrowHeadKeys[8],
  ArrowOnBothEnds = true,
  ArrowSizePoints = 24,
  LineWidthPoints = 12
};

//Create and add element to layout
GraphicElement lineElm = ElementFactory.Instance.CreateArrowGraphicElement(
  container, linePl, arrowInfo, "Arrow Line", true, 
                            new ElementInfo() { Rotation = 15.0 });
//lineElm.SetName("New Line");

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

ArrowInfo Class
ArrowInfo Members

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