HOW TO
This code sample shows how to change the fill and outline color of features in an ArcGIS Server feature service using an ArcMap add-in. The changes can persist in ArcMap by saving the ArcMap document.
using System; using System.Collections.Generic; using System.Text; using System.IO; using ESRI.ArcGIS.esriSystem; using ESRI.ArcGIS.ArcMapUI; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Display; namespace Add_FeatureService_to_ArcMap { public class Add_FeatureService_to_ArcMap : ESRI.ArcGIS.Desktop.AddIns.Button { public Add_FeatureService_to_ArcMap() { } protected override void OnClick() { IMxDocument pMx = ArcMap.Application.Document as IMxDocument; //You may replace this url with your own feature service url. In my case, I have an ArcGIS Server feature service that contains polygon features at the URL shown below: string url = "http://localhost:6080/arcgis/rest/services/FC1_Polygons/FeatureServer"; IPropertySet pFeatServProp = new PropertySet(); pFeatServProp.SetProperty("DATABASE", url); IWorkspaceFactory pFeatWorkspaceFact = new FeatureServiceWorkspaceFactory() as IWorkspaceFactory; IFeatureWorkspace pFeatureWorkspace = pFeatWorkspaceFact.Open(pFeatServProp, 0) as IFeatureWorkspace; IFeatureClass pfeatClass = pFeatureWorkspace.OpenFeatureClass("0") as IFeatureClass; // "0" corresponds to the first layer with index/id 0, similarly, "1", "2" refer to layer id 1 // and id 2, you may check the service rest end point to have a valid parameter in the OpenFeatureClass. IFeatureLayer pfeatLayer = new FeatureLayer(); pfeatLayer.FeatureClass = pfeatClass; pfeatLayer.Name = "Sami_FC1"; IGroupLayer pGroupLayer = new GroupLayer(); pGroupLayer.Name = "GroupLayerName"; // -------------------------------- RENDERER --------------------------------------------------- // Creating RGB Colors by pulling values from a Microsoft Color object System.Drawing.Color c = System.Drawing.Color.FromName("SlateBlue"); IRgbColor rgbColor_Fill = CreateRgbColor(c); System.Drawing.Color c2 = System.Drawing.Color.FromName("Red"); IRgbColor rgbColor_Outline = CreateRgbColor(c2); ISimpleLineSymbol simpleLineSymbol_Outline = new SimpleLineSymbol(); simpleLineSymbol_Outline.Color = rgbColor_Outline; simpleLineSymbol_Outline.Width = 3.0; ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbol(); simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; simpleFillSymbol.Color = rgbColor_Fill; simpleFillSymbol.Outline = simpleLineSymbol_Outline; ISimpleRenderer simpleRenderer = new SimpleRenderer(); simpleRenderer.Label = "Simple Renderer"; simpleRenderer.Symbol = simpleFillSymbol as ISymbol; IFeatureRenderer featureRenderer = simpleRenderer as IFeatureRenderer; IGeoFeatureLayer geoFeatureLayer = pfeatLayer as IGeoFeatureLayer; geoFeatureLayer.Renderer = featureRenderer; //-------------------------------- END RENDERER --------------------------------------------------- pGroupLayer.Add(pfeatLayer); pMx.FocusMap.AddLayer(pGroupLayer); ArcMap.Application.CurrentTool = null; } // Method used to extract RGB components out of the Microsoft Color object (a structure) protected static IRgbColor CreateRgbColor(System.Drawing.Color c) { // Note that c is a Microsoft color object, which has 4 components: alpha, R, G, B // The R, G, B components of the System.Drawing.Color object are assigned to the the ArcObjects IRgbColor object IRgbColor rgb = new RgbColorClass(); rgb.Red = c.R; rgb.Green = c.G; rgb.Blue = c.B; rgb.UseWindowsDithering = false; return rgb; } } }
Article ID: 000013843
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