Jeremy,
You can use the AddOverlay method to display a graphic on a 2D map by providing a geometry and a symbol.
This method is available from either the MapView or a MapTool.
The following example displays the vertices of a selected polyline as a graphic.
protected override void OnClick()
{
//Run on MCT
QueuedTask.Run(() =>
{
//get selected polyline
var selectedFeatures = ArcGIS.Desktop.Mapping.MapView.Active.Map.GetSelection();
var insp = new ArcGIS.Desktop.Editing.Attributes.Inspector();
insp.Load(selectedFeatures.Keys.First(), selectedFeatures.Values.First());
var polyLine = insp.Shape as ArcGIS.Core.Geometry.Polyline;
//mp builder
var multiPointBuilder = new ArcGIS.Core.Geometry.MultipointBuilder();
multiPointBuilder.Add(polyLine.Points);
//add overlay
var markerSymbol = ArcGIS.Desktop.Mapping.SymbolFactory.ConstructMarker(ColorFactory.Red, 11.0, SimpleMarkerStyle.Diamond);
var ptSymbol = SymbolFactory.ConstructPointSymbol(markerSymbol);
var vertexGraphics = MapView.Active.AddOverlay(multiPointBuilder.ToGeometry(), ptSymbol.MakeSymbolReference());
//vertexGraphics.Dispose(); //to clear the overlay
});
}Note that this works differently from the ArcMap graphics container as the graphic is referenced by the returned IDisposable variable. This is usually managed within the lifetime of a tool.
