ae中栅格数据转为矢量数据

ILayer pLayer = pAxMapControl.get_Layer(this.cmbLayer.SelectedIndex);
            IRasterLayer pRasterLayer = pLayer as IRasterLayer;

            IWorkspaceFactory2 pWorkspaceFactory2 = new RasterWorkspaceFactoryClass();
            IRasterWorkspace pRasterWorkspace;

            int Index = pRasterLayer.FilePath.LastIndexOf("\\");
            string filePath = pRasterLayer.FilePath.Substring(0, Index);
            string fileName = pRasterLayer.FilePath.Substring(Index + 1);

            pRasterWorkspace = (IRasterWorkspace)pWorkspaceFactory2.OpenFromFile(filePath, 0);
            IRasterDataset pRasterDataset = pRasterWorkspace.OpenRasterDataset(fileName);


            IGeoDataset pRasterGeoDataset = pRasterDataset as IGeoDataset;
            IWorkspaceFactory2 pWorkspaceFactoryShp = new ShapefileWorkspaceFactoryClass();
            //............................................................................
            IWorkspace pWorkspace = pWorkspaceFactoryShp.OpenFromFile(this.tbFolderPath.Text, 0);
            IConversionOp pConversionOp = new RasterConversionOpClass();
            ISpatialReference pSpatialReference = pRasterGeoDataset.SpatialReference;

            IGeoDataset pGeoDataset;
            //....................................................................
            pGeoDataset = pConversionOp.RasterDataToPolygonFeatureData(pRasterGeoDataset, pWorkspace, this.tbName.Text, true);

            IDataset pDataset1 = pGeoDataset as IDataset;
            IFeatureClass pFeatureClass = pDataset1 as IFeatureClass;

            IFeatureLayer pFeatureLayer = new FeatureLayerClass();
            pFeatureLayer.FeatureClass = pFeatureClass;

            pAxMapControl.ClearLayers();
            pAxMapControl.AddLayer(pFeatureLayer);
            pAxMapControl.Refresh();