Add point to created layer C#

BenasGircys — Sun, 01 Dec 2013 19:44:29 GMT

Hi, I developing a tool to create new layer and save points in this layer when clicked to map. Now I can create new layer or add point, both not working and I am wondering, maybe someone could help me.
My code:
here I get coordinates and draw point.

  ESRI.ArcGIS.Display.IDisplayTransformation displayTransformation = screenDisplay.DisplayTransformation;             ESRI.ArcGIS.Geometry.IPoint point = displayTransformation.ToMapPoint(x, y);             screenDisplay.DrawPoint(point);

then I create element, layer, add element to layer and add layer to map.

        IElement elem = null;         elem = point as IElement;         IMap map = activeView.FocusMap;          IGraphicsLayer graphicsLayer;         graphicsLayer = new CompositeGraphicsLayerClass();         ((ILayer)graphicsLayer).Name = "New Layer";         (graphicsLayer as IGraphicsContainer).AddElement(elem, 0);         map.AddLayer(graphicsLayer as ILayer);

I have example code which do the same but create polygon.

ESRI.ArcGIS.Display.IRubberBand rubberBand = new ESRI.ArcGIS.Display.RubberPolygonClass();             ESRI.ArcGIS.Geometry.IGeometry geometry = rubberBand.TrackNew(screenDisplay, symbol);             screenDisplay.SetSymbol(symbol);             screenDisplay.DrawPolygon(geometry);             screenDisplay.FinishDrawing();              IElement elem = null;             IPolygonElement polygonElement = new PolygonElementClass();             elem = polygonElement as IElement;             elem.Geometry = geometry as ESRI.ArcGIS.Geometry.IGeometry;              IMap map = activeView.FocusMap;              IGraphicsLayer graphicsLayer;             if (map.LayerCount == 0)             {                 graphicsLayer = new CompositeGraphicsLayerClass();                 ((ILayer)graphicsLayer).Name = "New Layer";                 (graphicsLayer as IGraphicsContainer).AddElement(elem, 0);                 map.AddLayer(graphicsLayer as ILayer);             }             else             {                 ILayer layer = map.get_Layer(0);                 graphicsLayer = layer as IGraphicsLayer;                 (graphicsLayer as IGraphicsContainer).AddElement(elem, 0);             }              activeView.Refresh();

So maybe someone knows how to solve my problem?

Re: Add point to created layer C#

ModyBuchbinder — Mon, 02 Dec 2013 04:10:16 GMT

Hi

If you need to save it into a feature class you must create a feature class (there is a snippet for this) and use cursor to add the point.
If you need a graphic I do not think the line: "elem = point as IElement;" works (elem will be null).
It should be
IElement elem = new MarkerElementClass();
elem.geometry = point;

ArcMap have a default symbol but you better set a marker symbol too for the element.
Have Fun
Mody

Re: Add point to created layer C#

BenasGircys — Mon, 02 Dec 2013 17:14:11 GMT

Hi

If you need to save it into a feature class you must create a feature class (there is a snippet for this) and use cursor to add the point.
If you need a graphic I do not think the line: "elem = point as IElement;" works (elem will be null).
It should be
IElement elem = new MarkerElementClass();
elem.geometry = point;

ArcMap have a default symbol but you better set a marker symbol too for the element.
Have Fun
Mody

Thanks a lot! It works 🙂

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Add point to created layer C#

Re: Add point to created layer C#

Re: Add point to created layer C#