Export DWG to SDF using Autodesk.Gis.Map.ImportExport.Exporter API

By Partha Sarkar

In Exporting DWG to SDF using *.epf file using Map 3D API I showed how to use *.epf file and Map 3D API to export DWG file to SDF file. In this example, I tried to explore how we can export DWG data to SDF (Spatial Data File) using AutoCAD Map 3D API without using a *.epf file.  This sample code uses Map 3D Autodesk.Gis.Map.ImportExport.Exporter class and exports the entities from a specific layer in the DWG file to GeometryType.Line. To find out what all GeometryType you can export, you need to explore the Autodesk:: Gis:: Map:: ImportExport:: GeometryType Enumeration. Details of these are available in the Map 3D SDK API reference documents. Here is the code snippet :

Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
    try
    {
        Exporter myExporter = null;
        MapApplication mapApp = HostMapApplicationServices.Application;
        myExporter = mapApp.Exporter;
 
        myExporter.Init("FDO_SDF", @"C:TempTest.sdf");
        myExporter.ClassMappingType = ExportClassMappingType.ByLayer;
        myExporter.ClosedPolylinesAsPolygons = true;
 
        string sSourceName = "Line"; // Source DWG file should have a Layer Named "Line"
        string sSchemaName = "ADNSchema";
        string sFeatureClassName = "LineFC";
 
        ExportClassMapping mapping = ExportClassMapping.Create(sSourceName, sSchemaName, sFeatureClassName);
        mapping.AddPropertyMapping(".COLOR", "Color");
        mapping.AddPropertyMapping(".LAYER", "Layer");
        mapping.AddPropertyMapping(".LENGTH", "Length");
 
        myExporter.AddClassMapping(mapping);
        myExporter.SetGeometryTypeForClass(sSchemaName, sFeatureClassName, GeometryType.Line);
        myExporter.TargetCoordinateSystem = "LL84";
        myExporter.ExportAll = true;
        myExporter.Export(true);
        ed.WriteMessage("nExport Completed !");
 
    }
    catch (Autodesk.Gis.Map.MapImportExportException e)
    {
        ed.WriteMessage("Exception thrown. Error Code = " + e.ErrorCode);
    }

And here is the resulted output SDF file in Map 3D :