C# + AE 一组线融合成面的问题

C# + AE 一组线融合成面的问题

请教各位大虾。我手上有一份由CAD转换生成的shp文件。转换完成后，有些本来应该是面的地方却是由一根根线组成的【比如一块绿地，转换完成后却是由一系列线围成，而不是一个面，可能是因为在最初CAD编辑时候的问题】。
现在问题就是，怎么样才能做到，我在地图上选中这些线，然后将这些线融合成一个面。
要用到那些接口，最好能有些代码来参考参考。谢谢！

问题基本已经解决，下面把代码贴出来：

不过 还有个问题就是由线转换得到的面有时候得到多个面，而不是一个面（比如两条相交的线转换出来就是两个面），这个是什么原因啊？怎么只得到一个面？


        private void creatpolygonfromlinr(IFeatureClass getpolygon_fc, IFeatureLayer fromline_fl)
        {
            //判断getpolygon_fc是否为面
            if (getpolygon_fc.ShapeType != esriGeometryType.esriGeometryPolygon)
                return;
            //得到选择的Feature的指针
            IFeatureSelection pFeatureSelection = fromline_fl as IFeatureSelection;
            ISelectionSet pSelectionSet = pFeatureSelection.SelectionSet;
            ICursor pCursor;
            pSelectionSet.Search(null, false, out pCursor);
            IFeatureCursor pFeatureCursor = pCursor as IFeatureCursor;
            IGeoDataset pGeoDataset = getpolygon_fc as IGeoDataset;
            IEnvelope pEnvelope = pGeoDataset.Extent;
            IInvalidArea pInvalidArea = new InvalidAreaClass();
            IFeatureConstruction pFeatureConstruction = new FeatureConstructionClass();
            IDataset pDataset = getpolygon_fc as IDataset;
            IWorkspace pWorkspace = pDataset.Workspace;
            IWorkspaceEdit pWorkspaceEdit = pWorkspace as IWorkspaceEdit;
            if (pWorkspaceEdit.IsBeingEdited() != true)
            {
                pWorkspaceEdit.StartEditing(true);
                pWorkspaceEdit.StartEditOperation();
            }
            //开始
            try
            {
                pFeatureConstruction.ConstructPolygonsFromFeaturesFromCursor(null, getpolygon_fc, pEnvelope, true, false, pFeatureCursor, pInvalidArea, -1, null);
                pWorkspaceEdit.StopEditOperation();
                pWorkspaceEdit.StopEditing(true);
            }
            catch
            {
                pWorkspaceEdit.AbortEditOperation();
            }
        }

评论

1 楼 JMS_Exception 2012-07-01