Is there any way to set polygon features fill color and outline programmatically?

Question

By some process I am creating a polygon feature layer. Before adding the layer in the map, I want to set polygon's fill color to no color and set polygon's outline color and width. I am working with C#.

Is there a way to set polygon feature layer's fill color or outline in ArcObjects?

Answer 1

You need to set the renderer for your layer. Since you want to use the same symbology for all, you will have to use a ISimpleRenderer

Using an IFillSymbol, you can set the border and the color for your polygons. Set this as the symbol for your ISimpleRenderer and set that as the FetureRenderer on your IFeatureLayer.

Also have a look at this article: How to define a renderer for your layer

Answer 2

Here:

public void RenderLayer_color(IFeatureLayer pFeatureLayer, IRgbColor pMamau)
        { 
            IGeoFeatureLayer pGeoFeatureLayer;
            pGeoFeatureLayer = (IGeoFeatureLayer)pFeatureLayer;
            IFeatureRenderer pFeatureRender;
            pFeatureRender = (IFeatureRenderer) new SimpleRenderer();                        
            IFillSymbol pFillSymbol;
            pFillSymbol = (IFillSymbol) new SimpleFillSymbol();            
            pFillSymbol.Color = pMamau;

            ISimpleRenderer pSimpleRenderer;
            pSimpleRenderer = new SimpleRenderer();            
            pSimpleRenderer.Symbol = (ISymbol) pFillSymbol;

            pGeoFeatureLayer.Renderer =  IFeatureRenderer)pSimpleRenderer;            
        }