Ejemplo n.º 1
0
        /// <summary>
        /// 以矢量的方式加载CAD数据
        /// </summary>
        /// <param name="mapControl">要加载的地图控件</param>
        public void AddCADByShp(AxMapControl mapControl)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Filter = "CAD(*.dwg)|*.dwg";
            openFileDialog.Title  = "打开CAD数据文件";
            openFileDialog.ShowDialog();

            string fullPath = openFileDialog.FileName;

            if (fullPath == "")
            {
                return;
            }
            //获取文件名和文件路径
            int    SubIndex = fullPath.LastIndexOf("\\");
            string fileDir  = fullPath.Substring(0, SubIndex);
            string fileName = fullPath.Substring(SubIndex + 1);

            IWorkspaceFactory workspaceFactory = new CadWorkspaceFactory();
            IFeatureWorkspace workspace        = (IFeatureWorkspace)workspaceFactory.OpenFromFile(fileDir, 0);
            IFeatureClass     feature          = workspace.OpenFeatureClass(fileName + ":polygon");
            IFeatureLayer     featureLayer     = new FeatureLayer();

            featureLayer.FeatureClass = feature;
            featureLayer.Name         = fileName;

            mapControl.AddLayer(featureLayer);
            mapControl.ActiveView.Refresh();
        }
Ejemplo n.º 2
0
        /// <summary>
        /// 作用:打开CAD文件Workspace
        /// 作者:汪建龙
        /// 编写时间:2016年11月22日12:54:02
        /// </summary>
        /// <param name="directory"></param>
        /// <returns></returns>
        public static IWorkspace OpenCADWorkSpace(string directory)
        {
            IWorkspaceFactory workspaceFactory = new CadWorkspaceFactory();
            IWorkspace        workspace        = workspaceFactory.OpenFromFile(directory, 0);

            return(workspace);
        }
        /// <summary>
        /// CAD文件作为矢量图层加载
        /// 分图层加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAddCADByLayerToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string filePath;
            string fileName;
            string filter = "CAD(*.dwg)|*.dwg";
            string title  = "打开CAD数据文件";

            outFilePathAndFileName(title, filter, out filePath, out fileName);
            if (fileName == null || filePath == null)
            {
                return;
            }

            IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactory();
            IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(filePath, 0) as IFeatureWorkspace;

            // 加载CAD文件中的线文件
            IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass(fileName + ":polyline");
            IFeatureLayer pFeatureLayer = new FeatureLayerClass();

            pFeatureLayer.Name         = fileName;
            pFeatureLayer.FeatureClass = pFeatureClass;

            // 新增删除数据
            ClearAllData();

            MainMapControl.AddLayer(pFeatureLayer);
            MainMapControl.Refresh();

            //同步鹰眼
            SynchronizeEagleEye();
        }
Ejemplo n.º 4
0
        /// <summary>
        /// 以栅格背景图的形式添加CAD数据
        /// </summary>
        /// <param name="mapControl">要添加CAD数据的地图控件</param>
        public void AddCADByRaster(AxMapControl mapControl)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Filter = "CAD(*.dwg)|*.dwg";
            openFileDialog.Title  = "打开CAD数据文件";
            openFileDialog.ShowDialog();

            string fullPath = openFileDialog.FileName;

            if (fullPath == "")
            {
                return;
            }
            //获取文件名和文件路径
            int    subIndex = fullPath.LastIndexOf("\\");
            string fileDir  = fullPath.Substring(0, subIndex);
            string fileName = fullPath.Substring(subIndex + 1);

            IWorkspaceFactory    CadWorkspaceFactory = new CadWorkspaceFactory();
            ICadDrawingWorkspace CadWorkspace        = (ICadDrawingWorkspace)CadWorkspaceFactory.OpenFromFile(fileDir, 0);
            ICadDrawingDataset   cadDrawingDataset   = CadWorkspace.OpenCadDrawingDataset(fileName);
            ICadLayer            cadLayer            = new CadLayerClass();

            cadLayer.CadDrawingDataset = cadDrawingDataset;
            mapControl.AddLayer(cadLayer);
            mapControl.ActiveView.Refresh();
        }
Ejemplo n.º 5
0
 private void method1ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     System.Windows.Forms.OpenFileDialog openFileDialog =
         new System.Windows.Forms.OpenFileDialog();
     openFileDialog.Filter           = "CAD (*.dwg)|*.dwg";
     openFileDialog.FilterIndex      = 2;
     openFileDialog.RestoreDirectory = true;
     openFileDialog.Multiselect      = false;
     if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
     {
         string filename = openFileDialog.FileName;
         if (filename != "")
         {
             //axMapControl1.ClearLayers();
             IWorkspaceFactory pCadWorkspaceFactory =
                 new CadWorkspaceFactory();
             IWorkspace pWorkspace = pCadWorkspaceFactory.OpenFromFile(
                 System.IO.Path.GetDirectoryName(filename), 0);
             ICadDrawingWorkspace pCadDrawingWorkspace =
                 (ICadDrawingWorkspace)pWorkspace;
             ICadDrawingDataset pCadDataset =
                 pCadDrawingWorkspace.OpenCadDrawingDataset(
                     System.IO.Path.GetFileName(filename));
             ICadLayer pCadLayer = new CadLayerClass();
             pCadLayer.CadDrawingDataset = pCadDataset;
             axMapControl1.AddLayer(pCadLayer, 0);
         }
     }
 }
Ejemplo n.º 6
0
        // 测试导入道路
        public static Form TestCase1()
        {
            var factory2 = new CadWorkspaceFactory();
            try
            {
                var path = System.IO.Path.GetDirectoryName(@"C:\Temp\Traffic\temp.dxf");
                var ws2 = factory2.OpenFromFile(path, 0) as IFeatureWorkspace;

                var fc2 = ws2.OpenFeatureClass(System.IO.Path.GetFileName(@"C:\Temp\Traffic\temp.dxf") + ":polyline");

                var cursor = fc2.Search(null, true);
                var f = cursor.NextFeature();

                var lst = new List<IPolyline>();
                while (f != null)
                {
                    var geo = f.ShapeCopy;
                    if (!(geo is IPolyline) || geo.IsEmpty == true)
                    {
                        MessageBox.Show("当前CAD文件中包含的路线类型信息不正确,请检查。", "注意");
                        Marshal.ReleaseComObject(cursor);
                        return null;
                    }
                    else
                    {
                        lst.Add(geo as IPolyline);
                    }
                    f = cursor.NextFeature();
                }
                Marshal.ReleaseComObject(cursor);

                if (lst.Count == 0)
                {
                    MessageBox.Show("当前CAD文件中不包含路线信息,请检查。", "注意");
                    return null;
                }

                RoadMerger.FragmentThreshold = 20;
                var ls = RoadMerger.SplitLine(lst);

                var factory = new AccessWorkspaceFactory();
                var ws = factory.OpenFromFile(@"C:\Temp\Traffic\db.mdb", 0) as IFeatureWorkspace;
                var fc = ws.OpenFeatureClass("AROAD");
                var historyFC = ws.OpenFeatureClass("ROADHIS");
                var nodeFC = ws.OpenFeatureClass("NODE");

                var lines = RoadMerger.QueryIntersects(ls, fc);

                var form = new ImportRoadForm(ls, fc, historyFC, nodeFC, lines);
                return form;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "注意");
                return null;
            }
        }
        /// <summary>
        /// CAD文件作为矢量图层加载
        /// 整幅图加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAddWhileCADToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string filePath;
            string fileName;
            string filter = "CAD(*.dwg)|*.dwg";
            string title  = "打开CAD数据文件";

            outFilePathAndFileName(title, filter, out filePath, out fileName);
            if (fileName == null || filePath == null)
            {
                return;
            }
            // 打开一个CAD数据集
            IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactory();
            IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(filePath, 0) as IFeatureWorkspace;
            // 打开一个要素集
            IFeatureDataset pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);
            // IFeatureClassContainer 可以管理IFeatureDataset中的每个要素类
            IFeatureClassContainer pFeatureClassContainer = pFeatureDataset as IFeatureClassContainer;

            // 新增删除数据
            ClearAllData();

            // 对CAD文件中的要素进行遍历处理
            for (int i = 0; i < pFeatureClassContainer.ClassCount; i++)
            {
                IFeatureClass pFeatClass = pFeatureClassContainer.get_Class(i);

                // 如果是注记,则添加注记层
                if (pFeatClass.FeatureType == esriFeatureType.esriFTCoverageAnnotation)
                {
                    IFeatureLayer pFeatureLayer = new CadAnnotationLayerClass();
                    pFeatureLayer.Name         = pFeatClass.AliasName;
                    pFeatureLayer.FeatureClass = pFeatClass;
                    MainMapControl.AddLayer(pFeatureLayer);
                }
                // 如果是点线面则添加要素层
                else
                {
                    IFeatureLayer pFeatureLayer = new FeatureLayerClass();
                    pFeatureLayer.Name         = pFeatClass.AliasName;
                    pFeatureLayer.FeatureClass = pFeatClass;
                    MainMapControl.AddLayer(pFeatureLayer);
                }
                MainMapControl.Refresh();
            }

            // 同步鹰眼
            SynchronizeEagleEye();
        }
Ejemplo n.º 8
0
        /// <summary>
        /// 整体添加CAD数据
        /// </summary>
        /// <param name="mapControl">要添加的地图控件</param>
        public void AddWholeCAD(AxMapControl mapControl)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Filter = "CAD(*.dwg)|*.dwg";
            openFileDialog.Title  = "打开CAD数据文件";
            openFileDialog.ShowDialog();

            string fullPath = openFileDialog.FileName;

            if (fullPath == "")
            {
                return;
            }
            //获取文件名和文件路径
            int    SubIndex = fullPath.LastIndexOf("\\");
            string fileDir  = fullPath.Substring(0, SubIndex);
            string fileName = fullPath.Substring(SubIndex + 1);

            IWorkspaceFactory      workspaceFactory      = new CadWorkspaceFactory();
            IFeatureWorkspace      workspace             = (IFeatureWorkspace)workspaceFactory.OpenFromFile(fileDir, 0);
            IFeatureDataset        FeatureDataset        = workspace.OpenFeatureDataset(fileName);
            IFeatureClassContainer featureClassContainer = FeatureDataset as IFeatureClassContainer;
            IFeatureClass          featureClass;
            IFeatureLayer          featureLayer;

            for (int i = 0; i < featureClassContainer.ClassCount; i++)
            {
                featureClass = featureClassContainer.get_Class(i);
                if (featureClass.FeatureType == esriFeatureType.esriFTCoverageAnnotation)
                {
                    featureLayer = new CadAnnotationLayerClass();
                    featureLayer.FeatureClass = featureClass;
                    featureLayer.Name         = featureClass.AliasName;
                    mapControl.AddLayer(featureLayer);
                }
                else
                {
                    featureLayer = new FeatureLayerClass();
                    featureLayer.FeatureClass = featureClass;
                    featureLayer.Name         = featureClass.AliasName;
                    mapControl.AddLayer(featureLayer);
                }
                mapControl.ActiveView.Refresh();
            }
        }
Ejemplo n.º 9
0
 private void method2ToolStripMenuItem_Click(object sender, EventArgs e)
 {
     System.Windows.Forms.OpenFileDialog openFileDialog =
         new System.Windows.Forms.OpenFileDialog();
     openFileDialog.Filter           = "CAD (*.dwg)|*.dwg";
     openFileDialog.FilterIndex      = 2;
     openFileDialog.RestoreDirectory = true;
     openFileDialog.Multiselect      = false;
     if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
     {
         string filename = openFileDialog.FileName;
         if (filename != "")
         {
             //axMapControl1.ClearLayers();
             IWorkspaceFactory pCadWorkspaceFactory = new CadWorkspaceFactory();
             IFeatureWorkspace pWorkspace           = pCadWorkspaceFactory.OpenFromFile(
                 System.IO.Path.GetDirectoryName(filename), 0) as IFeatureWorkspace;
             IFeatureDataset pFeatureDataset = pWorkspace.OpenFeatureDataset(
                 System.IO.Path.GetFileName(filename));
             IFeatureClassContainer pFeatureClassContainer =
                 pFeatureDataset as IFeatureClassContainer;
             IFeatureClass pFeatureClass;
             IFeatureLayer pFeatureLayer;
             for (int i = 0; i < pFeatureClassContainer.ClassCount; i++)
             {
                 pFeatureClass = pFeatureClassContainer.get_Class(i);
                 if (pFeatureClass.FeatureType ==
                     esriFeatureType.esriFTCoverageAnnotation)
                 {
                     pFeatureLayer = new CadAnnotationLayerClass();
                 }
                 else
                 {
                     pFeatureLayer = new FeatureLayerClass();
                 }
                 pFeatureLayer.Name         = pFeatureClass.AliasName;
                 pFeatureLayer.FeatureClass = pFeatureClass;
                 axMapControl1.AddLayer(pFeatureLayer, 0);
             }
         }
     }
 }
Ejemplo n.º 10
0
 /// <summary>
 /// 获取CAD数据工作空间
 /// </summary>
 /// <param name="cadPath"></param>
 /// <returns></returns>
 public static IWorkspace GetCADWorkspcae(string cadPath)
 {
     if (string.IsNullOrWhiteSpace(cadPath) || !File.Exists(cadPath))
     {
         throw new Exception(string.Format("CAD文件不存在,文件路径:“{0}”", cadPath));
     }
     else
     {
         try
         {
             IWorkspaceFactory pWorkspaceFac = new CadWorkspaceFactory();
             IWorkspace        workspace     = pWorkspaceFac.OpenFromFile(cadPath, 0);
             return(workspace);
         }
         catch (Exception ex)
         {
             throw new Exception(string.Format("读取CAD文件失败,文件路径:“{0}”", cadPath), ex);
         }
     }
 }
        /// <summary>
        /// CAD文件作为栅格图层加载
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnAddRasterByCADToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string filePath;
            string fileName;
            string filter = "CAD(*.dwg)|*.dwg";
            string title  = "打开CAD数据文件";

            outFilePathAndFileName(title, filter, out filePath, out fileName);
            if (fileName == null || filePath == null)
            {
                return;
            }
            IWorkspaceFactory    pWorkspaceFactory    = new CadWorkspaceFactory();
            IWorkspace           pWorkspace           = pWorkspaceFactory.OpenFromFile(filePath, 0);
            ICadDrawingWorkspace pCadDrawingWorkspace = pWorkspace as ICadDrawingWorkspace;
            // 获取CAD数据集
            ICadDrawingDataset pCadDrawingDataset = pCadDrawingWorkspace.OpenCadDrawingDataset(fileName);
            ICadLayer          pCadLayer          = new CadLayerClass();

            pCadLayer.CadDrawingDataset = pCadDrawingDataset;
            MainMapControl.AddLayer(pCadLayer);
            MainMapControl.Refresh();
        }
Ejemplo n.º 12
0
        // // 添加CAD,dxf,dgn图层
        public static bool AddCADLayer(ref IBasicMap pBasicMap, string vPath, List <IFeatureLayer> pSelectedCln, bool blnAddData)
        {
            bool functionReturnValue = false;

            //WHFErrorHandle.clsErrorHandle pdisplayinfo = new WHFErrorHandle.clsErrorHandle();
            IWorkspaceFactory pFact             = default(IWorkspaceFactory);
            IWorkspace        pWorkSpace        = default(IWorkspace);
            IFeatureWorkspace pFeatureWorkspace = default(IFeatureWorkspace);
            IFeatureLayer     pFtLyr            = default(IFeatureLayer);
            IFeatureClass     pFtCls            = default(IFeatureClass);
            string            pFile             = null;

            pFact             = new CadWorkspaceFactory();
            pWorkSpace        = pFact.OpenFromFile(vPath, 0);
            pFeatureWorkspace = (IFeatureWorkspace)pWorkSpace;
            int             i          = 0;
            int             j          = 0;
            IFeatureDataset pFtDataset = default(IFeatureDataset);

            for (j = 1; j <= pSelectedCln.Count; j++)
            {
                pFile      = (string)pSelectedCln[j].Name;
                pFtDataset = pFeatureWorkspace.OpenFeatureDataset(pFile);
                IFeatureClassContainer pFtClsContainer = default(IFeatureClassContainer);
                pFtClsContainer = (IFeatureClassContainer)pFtDataset;

                //检查当前目录是否是cad工作空间
                if (pFtClsContainer == null | pFtClsContainer.ClassCount == 0)
                {
                    //pdisplayinfo.DisplayInformation("CAD文件:" + pFile + "不存在数据层", false);
                    MessageBoxEx.Show("CAD文件:" + pFile + "不存在数据层", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    functionReturnValue = false;
                    return(functionReturnValue);
                }

                for (i = 0; i <= pFtClsContainer.ClassCount - 1; i++)
                {
                    pFtCls = pFtClsContainer.get_Class(i);
                    if (pFtCls.FeatureType == esriFeatureType.esriFTSimple)
                    {
                        pFtLyr = new CadFeatureLayerClass();
                        pFtLyr.FeatureClass = pFtCls;
                        pFtLyr.Name         = pFile + ":" + pFtCls.AliasName;

                        pSelectedCln.Add(pFtLyr);
                        functionReturnValue = true;
                    }
                    else if (pFtCls.FeatureType == esriFeatureType.esriFTAnnotation)
                    {
                        pFtLyr = new CadAnnotationLayerClass();
                        pFtLyr.FeatureClass = pFtCls;

                        pFtLyr.Name = pFile + " " + pFtCls.AliasName;

                        pSelectedCln.Add(pFtLyr);

                        functionReturnValue = true;
                    }
                }
            }
            return(functionReturnValue);
        }
Ejemplo n.º 13
0
        /// <summary>
        /// 导入CAD文件
        /// </summary>
        public void Import()
        {
            OpenFileDialog openDwg = new OpenFileDialog();
            openDwg.Filter = "CAD file(*.DWG)|*.DWG|CAD DGN file(*.DGN)|*.DGN|CAD DXF file(*.DXF)|*.DXF";
            openDwg.Title = "DWG格式数据的输入";
            if (openDwg.ShowDialog() == DialogResult.OK)
            {
                string dwgfileName = openDwg.FileName;
                string fileName = dwgfileName.Substring(dwgfileName.LastIndexOf(@"\") + 1);
                string filePath = dwgfileName.Substring(0, dwgfileName.Length - fileName.Length - 1);
                IFeatureLayer pFeatureLayer;
                //打开CAD数据集
                IWorkspaceFactory2 pWorkspaceFactory = new CadWorkspaceFactory() as IWorkspaceFactory2;
                IFeatureWorkspace pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);
                //打开一个要素集
                IFeatureDataset pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);
                //IFeaturClassContainer可以管理IFeatureDataset中的每个要素类
                IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;
                //对CAD文件中的要素进行遍历处理
                IEnvelope envelope = new Envelope() as IEnvelope;
                for (int i = 0; i < pFeatureClassContainer.ClassCount; i++)
                {
                    try
                    {
                        IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i);
                        if (pFeatureClass.FeatureType == esriFeatureType.esriFTAnnotation)
                        {
                            //如果是注记,则添加注记层
                            pFeatureLayer = new CadAnnotationLayer() as IFeatureLayer;
                        }
                        else//如果是点、线、面,则添加要素层
                        {
                            pFeatureLayer = new FeatureLayer() as IFeatureLayer;
                        }
                        pFeatureLayer.Name = pFeatureClass.AliasName;
                        pFeatureLayer.FeatureClass = pFeatureClass;
                        this.AxMapControl.Map.AddLayer(pFeatureLayer);

                        //

                        IQueryFilter queryFilter = new QueryFilter() as IQueryFilter;
                        queryFilter.WhereClause = "";
                        IFeatureCursor featureCursor = pFeatureLayer.FeatureClass.Search(queryFilter, true);
                        IFeature feature = featureCursor.NextFeature();
                        while (feature != null)
                        {
                            IGeometry geometry = feature.Shape;
                            IEnvelope featureExtent = geometry.Envelope;
                            envelope.Union(featureExtent);
                            System.Runtime.InteropServices.Marshal.ReleaseComObject(feature);
                            feature = featureCursor.NextFeature();
                        }
                    }
                    catch (Exception ex)
                    {
                        continue;
                    }

                }
                this.AxMapControl.ActiveView.Refresh();
            }
        }
Ejemplo n.º 14
0
        private void btnAddRoad_Click(object sender, EventArgs e)
        {
            this.operateMode = OperateMode.None;
            var dialog = new OpenFileDialog { Title = "请选择需要导入的CAD文件", Filter = "DXF文件 (*.dxf)|*.dxf" };
            if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.Cancel) return;

            var factory = new CadWorkspaceFactory();
            try
            {
                var path = System.IO.Path.GetDirectoryName(dialog.FileName);
                var ws = factory.OpenFromFile(path, 0) as IFeatureWorkspace;

                var fc = ws.OpenFeatureClass(System.IO.Path.GetFileName(dialog.FileName) + ":polyline");

                var cursor = fc.Search(null, true);
                var f = cursor.NextFeature();

                var lst = new List<IPolyline>();
                while(f!= null)
                {
                    var geo = f.ShapeCopy;
                    if (!(geo is IPolyline) || geo.IsEmpty == true)
                    {
                        MessageBox.Show("当前CAD文件中包含的路线类型信息不正确,请检查。", "注意");
                        Marshal.ReleaseComObject(cursor);
                        return;
                    }
                    else
                    {
                        lst.Add(geo as IPolyline);
                    }
                    f = cursor.NextFeature();
                }
                Marshal.ReleaseComObject(cursor);

                if (lst.Count == 0)
                {
                    MessageBox.Show("当前CAD文件中不包含路线信息,请检查。", "注意");
                    return;
                }

                ImportRoad(lst);
            }
            catch(Exception ex)
            {
                MessageBox.Show("打开CAD文件错误,请检查CAD文件。\r\n详情:" + ex, "注意");
            }
        }
Ejemplo n.º 15
0
        /// <summary>
        /// 导入CAD文件
        /// </summary>
        public void Import()
        {
            OpenFileDialog openDwg = new OpenFileDialog();

            openDwg.Filter = "CAD file(*.DWG)|*.DWG|CAD DGN file(*.DGN)|*.DGN|CAD DXF file(*.DXF)|*.DXF";
            openDwg.Title  = "DWG格式数据的输入";
            if (openDwg.ShowDialog() == DialogResult.OK)
            {
                string        dwgfileName = openDwg.FileName;
                string        fileName    = dwgfileName.Substring(dwgfileName.LastIndexOf(@"\") + 1);
                string        filePath    = dwgfileName.Substring(0, dwgfileName.Length - fileName.Length - 1);
                IFeatureLayer pFeatureLayer;
                //打开CAD数据集
                IWorkspaceFactory2 pWorkspaceFactory = new CadWorkspaceFactory() as IWorkspaceFactory2;
                IFeatureWorkspace  pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);
                //打开一个要素集
                IFeatureDataset pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);
                //IFeaturClassContainer可以管理IFeatureDataset中的每个要素类
                IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;
                //对CAD文件中的要素进行遍历处理
                IEnvelope envelope = new Envelope() as IEnvelope;
                for (int i = 0; i < pFeatureClassContainer.ClassCount; i++)
                {
                    try
                    {
                        IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i);
                        if (pFeatureClass.FeatureType == esriFeatureType.esriFTAnnotation)
                        {
                            //如果是注记,则添加注记层
                            pFeatureLayer = new CadAnnotationLayer() as IFeatureLayer;
                        }
                        else//如果是点、线、面,则添加要素层
                        {
                            pFeatureLayer = new FeatureLayer() as IFeatureLayer;
                        }
                        pFeatureLayer.Name         = pFeatureClass.AliasName;
                        pFeatureLayer.FeatureClass = pFeatureClass;
                        this.AxMapControl.Map.AddLayer(pFeatureLayer);

                        //

                        IQueryFilter queryFilter = new QueryFilter() as IQueryFilter;
                        queryFilter.WhereClause = "";
                        IFeatureCursor featureCursor = pFeatureLayer.FeatureClass.Search(queryFilter, true);
                        IFeature       feature       = featureCursor.NextFeature();
                        while (feature != null)
                        {
                            IGeometry geometry      = feature.Shape;
                            IEnvelope featureExtent = geometry.Envelope;
                            envelope.Union(featureExtent);
                            System.Runtime.InteropServices.Marshal.ReleaseComObject(feature);
                            feature = featureCursor.NextFeature();
                        }
                    }
                    catch (Exception ex)
                    {
                        continue;
                    }
                }
                this.AxMapControl.ActiveView.Refresh();
            }
        }