操作方法
此代码示例显示了如何使用 ArcMap 加载项更改 ArcGIS Server 要素服务中要素的填充和轮廓颜色。 通过保存 ArcMap 文档,可以在 ArcMap 中保留更改。
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; //您可以将此 URL 替换为自己的要素服务 URL。 在我的案例中,ArcGIS Server 要素服务在如下所示的 URL 中包含面要素: 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”对应于索引/ID 为 0 的第一个图层,同理,“1”和“2”指的是图层 ID 1 // 和 ID 2,您可以查看服务 REST 端点以确保 OpenFeatureClass 中的参数有效。 IFeatureLayer pfeatLayer = new FeatureLayer(); pfeatLayer.FeatureClass = pfeatClass; pfeatLayer.Name = "Sami_FC1"; IGroupLayer pGroupLayer = new GroupLayer(); pGroupLayer.Name = "GroupLayerName"; // -------------------------------- RENDERER --------------------------------------------------- // 通过从 Microsoft 颜色对象提取值来创建 RGB 颜色 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; } // 用于从 Microsoft 颜色对象(结构)中提取 RGB 组件的方法 protected static IRgbColor CreateRgbColor(System.Drawing.Color c) { // 请注意 c 为 Microsoft 颜色对象,它具有 4 个组件:alpha、R、G、B // System.Drawing.Color 对象的 R、G、B 组件分配至 ArcObjects IRgbColor 对象 IRgbColor rgb = new RgbColorClass(); rgb.Red = c.R; rgb.Green = c.G; rgb.Blue = c.B; rgb.UseWindowsDithering = false; return rgb; } } }
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