ArcEngine保存栅格数据至rastercatalog

　　将栅格数据（IRasterDataset）直接保存到数据库中很常见，但是保存到栅格目录下就比较少见，好不容易才找到，在这里记录一下。

　　

        public void saveRasterDs2Catalog(IRasterDataset rasterDs, IRasterCatalog rasterCatalog)
        {
            //保存前先设置rasterCatalog的坐标系，不然保存的栅格数据坐标系为空
            IRasterProps rProps = rasterDs.CreateDefaultRaster() as IRasterProps;
            rasterCatalog.AlterRasterSpatialReference(rProps.SpatialReference);

            IFeatureClass featureclass = rasterCatalog as IFeatureClass;
            IFeature feature = featureclass.CreateFeature();

            IRasterValue rValue = new RasterValueClass();
            rValue.RasterDataset = rasterDs;
            feature.set_Value(rasterCatalog.RasterFieldIndex, rValue);
            //如果栅格目录里还有其他属性，也可以在这里设置
            feature.Store();
        }

        /// <summary>
        /// 把一个文件夹里的栅格数据都保存到rastercatalog中
        /// </summary>
        /// <param name="propertySet">数据库的连接属性</param>
        /// <param name="catalogName">rastercatalog的名称</param>
        /// <param name="rasterFolder">包含有栅格数据的文件夹</param>
        public void loadDir2Catalog(IPropertySet propertySet,String catalogName,String rasterFolder)
        {
            //IWorkspaceFactory wkspFactory = new SdeWorkspaceFactoryClass();
            //IWorkspace wksp = wkspFactory.Open(propertySet, 0);
            //IRasterWorkspaceEx rasterWkspEx = wksp as IRasterWorkspaceEx;
            //IRasterCatalog rasterCatalog = rasterWkspEx.OpenRasterCatalog(catalogName);

            ITrackCancel pTrackCancel = new TrackCancel();
            IRasterCatalogLoader rCatalogLoader = new RasterCatalogLoaderClass();
            rCatalogLoader.ConnectionProperties = propertySet;
            rCatalogLoader.Load(catalogName, rasterFolder, pTrackCancel);
        }