FeatureLayer.SelectFeature() - Polygon fill symbol (Colorize the area of a polygon)

[OliverBrandt2]

Hi all,

how can I fill the whole polygone after selecting it on a featureLayer? FeatureLayer supports only to highlight the lines of the polygon by default. In ArcMap it is possible to set a selection symbol, which allows to color the included area.

Do anybody have an idea to solve this?

Thank you guys!

[AnttiKajanus1 · Accepted solution]

Hi Oliver,

I think that you need to copy the feature as a graphic to GraphicsOverlay and define your custom selection symbol as a symbol for that one. Also you might want to hide the selected feature from the FeatureLayer using featureLayer.SetVisibility method. There is a bit more code involved with this approach but it gives you full control what is shown with what symbols and when.

[OliverBrandt2]

Hi Antti,

thanks for your response. Taking the geometry and creating a graphic out of it, is an good approach. I'll try this.

[Anonymous User]

Hi Oliver,

The following VBA sample is able to set the selection symbol to be solid green:

Public Sub SetSeleSymbol()

    Dim pMxDoc As IMxDocument

    Set pMxDoc = ThisDocument

    Dim pMap As IMap

    Set pMap = pMxDoc.FocusMap

    Dim pFeatLayer As IFeatureLayer

    Set pFeatLayer = pMap.Layer(0)

    Dim featSel As IFeatureSelection

    Set featSel = pFeatLayer

    Dim polySym As ISimpleFillSymbol

    Set polySym = New SimpleFillSymbol

    Dim pColor1 As IRgbColor

    Set pColor1 = New RgbColor

    pColor1.Red = 0

    pColor1.Green = 250

    pColor1.Blue = 0

    Dim pcolor2 As IRgbColor

    Set pcolor2 = New RgbColor

    pcolor2.Red = 0

    pcolor2.Green = 0

    pcolor2.Blue = 250

    Dim pLineSym As ILineSymbol

    Set pLineSym = New SimpleLineSymbol

    pLineSym.Color = pcolor2

    pLineSym.Width = 2

    polySym.Color = pColor1

    polySym.Outline = pLineSym

    featSel.SetSelectionSymbol = True

    Set featSel.SelectionSymbol = polySym

End Sub

Results will be like this:

[OliverBrandt2]

Thank you! This is an very interesting example, but we are using ArcGIS runtime for .NET.

I worked with Antti's approach.

My Code is:

var color = Color.FromArgb(150,140,235,240);

var selectionColor = new SimpleFillSymbol

            {

                Color = color

            };

var selectedPolygon = GeodatabaseFeature.AsGraphic();

selectedPolygon.Symbol = selectionColor;

_MapView.GraphicsOverlays[PolygonGraphicsOverlayKey].Graphics.Add(selectedPolygon);

At my clearSelection method I clear the PolygonGraphicsOverlay as well. This works very good for me.