arcgis二次开发加载道路的C#代码

以下是一个简单的示例代码，演示如何在 ArcMap 中加载道路数据并进行二次开发：

using ESRI.ArcGIS.ADF;
using ESRI.ArcGIS.ADF.Connection.Local;
using ESRI.ArcGIS.ADF.Geometry;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Geodatabase;
using System;

namespace RoadLoader
{
    class Program
    {
        static void Main(string[] args)
        {
            // Open the local geodatabase
            IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactory();
            IWorkspace workspace = workspaceFactory.OpenFromFile(@"C:\data\roads.gdb", 0);

            // Get the road feature class
            IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;
            IFeatureClass roadFeatureClass = featureWorkspace.OpenFeatureClass("roads");

            // Create a new map document
            IMapDocument mapDocument = new MapDocumentClass();
            mapDocument.New(@"C:\data\map.mxd");

            // Get the map from the map document
            IMap map = mapDocument.Map[0];

            // Create a new layer from the road feature class
            IFeatureLayer roadLayer = new FeatureLayerClass();
            roadLayer.FeatureClass = roadFeatureClass;
            roadLayer.Name = "Roads";

            // Add the road layer to the map
            map.AddLayer(roadLayer);

            // Refresh the map to display the new layer
            mapDocument.ActiveView.Refresh();

            // Close the map document and release resources
            mapDocument.Close();
            ComReleaser.ReleaseCOMObject(mapDocument);
            ComReleaser.ReleaseCOMObject(map);
            ComReleaser.ReleaseCOMObject(workspace);
            ComReleaser.ReleaseCOMObject(workspaceFactory);
            ComReleaser.ReleaseCOMObject(featureWorkspace);
            ComReleaser.ReleaseCOMObject(roadFeatureClass);
            ComReleaser.ReleaseCOMObject(roadLayer);
        }
    }
}

这个示例代码演示了如何使用 ArcObjects API 加载一个名为“roads”的要素类，并将其添加为地图文档中的一个新图层。需要注意的是，这个示例代码仅用于演示用途，实际情况中可能需要根据具体需求进行修改和优化。