private void ConvertDwgToShp()

        {

            DwgReader pDwgReader = new DwgReader(@"D:\app\CAD\test.dwg");

            DxfModel pDxf = pDwgReader.Read();

            DxfEntityCollection xx = pDxf.Entities;

            //为写入shp文件做准备

            WriteDestShpFile wSHP = new WriteDestShpFile();

            //在遍历CAD要素时 筛选唯一图层，创建shp用

            List<string> pLayerList = new List<string>();

            //创建shp文件时，字段集合

            List<string> pDwgFieldList = new List<string>();

            //写入shp时，字段与值 的键值对

            Dictionary<string,string> pDic = new Dictionary<string,string>();

            IWorkspaceFactory pWFactory = new ShapefileWorkspaceFactoryClass();

            IFeatureWorkspace pFWorkspace = pWFactory.OpenFromFile("C:/test",0) as IFeatureWorkspace;

            DelegateTest delegateTest = null;

            foreach (DxfEntity item in xx)

            {

                //当前要素的类型（点线面）

                string GeoType = GetEntityType.GetitemType(item);

                //当前要素将要存入的图层名称

                string DesLayerName = string.Format("{0}_{1}", item.Layer.Name, GeoType);

                //扩展属性

                DxfExtendedDataCollection pDxfDataCol = item.ExtendedDataCollection;

                pDic.Clear();

                pDwgFieldList.Clear();

                foreach (DxfExtendedData ExData in pDxfDataCol)

                {

                    //AppID.Name 字段名

                    pDwgFieldList.Add(ExData.AppId.Name);

                    string values = "";

                    for (int j = 0; j < ExData.Values.Count; j++)

                    {

                        values += ExData.Values[j];

                    }

                    pDic.Add(ExData.AppId.Name, values);

                }

                if (!pLayerList.Contains(DesLayerName))

                {

                    pLayerList.Add(DesLayerName);    
　　　　　　　　　　　　//此处为根据要素类类型，名称，字段及路径的一个创建shp文件的方法（需要方法联系,下有联系方式）

                    CreateDestShpFile.CreateShpFile(GeoType, DesLayerName, pDwgFieldList, "C:/test");

                }

                switch (item.GetType().Name)

                {

                    case "DxfLwPolyline":

                        delegateTest = new DelegateTest((new ConvertDxfLwPolyline()).ConvertToshp);

                        break;

                    case "DxfLwPoint":

                        delegateTest = new DelegateTest((new ConvertDxfPoint()).ConvertToshp);

                        break;

                    case "DxfCircle":

                        delegateTest = new DelegateTest((new ConvertDxfCircle()).ConvertToshp);

                        break;

                    case "DxfPolyline2D":

                        delegateTest = new DelegateTest((new ConvertDxfPolyline2D()).ConvertToshp);

                        break;

                    default:

                        Console.WriteLine(item.GetType().Name);

                        break;

                }

                IGeometry pGeometry = delegateTest.Invoke(item);

                IFeatureClass pFeatureClass = pFWorkspace.OpenFeatureClass(DesLayerName);

                wSHP.WriteDestFeature(pFeatureClass, pGeometry,pDic);

            }

        }

 1 public  IGeometry ConvertToshp(DxfEntity item)

 2         {

 3             //CAD 获取点集合

 4             DxfLwPolyline pPointColl = item as DxfLwPolyline;

 5

 6             IGeometry pGeometry = null;

 7             if (pPointColl.Closed)

 8             {

 9                 IPointCollection pPoints = new PolygonClass();

10                 foreach (var point in pPointColl.Vertices)

11                 {

12                     IPoint pPoint = new PointClass() { X = point.X, Y = point.Y };

13                     pPoints.AddPoint(pPoint);

14                 }

15                 pPoints.AddPoint(pPoints.get_Point(0));

16                 pGeometry = pPoints as IPolygon;

17             }

18             else

19             {

20                 IPointCollection pPoints = new PolylineClass();

21                 foreach (var point in pPointColl.Vertices)

22                 {

23                     IPoint pPoint = new PointClass() { X = point.X, Y = point.Y };

24                     pPoints.AddPoint(pPoint);

25                 }

26                 pGeometry = pPoints as IPolyline;

27             }

28             return pGeometry;

29         }