ArcGIS 栅格数据已加载后的获取

using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.SpatialAnalystTools;
using ESRI.ArcGIS.Geodatabase;//IRaster
using ESRI.ArcGIS.Display;//IRasterLayer

if (DHmapcontrol.LayerCount == 0)//DHmapcontrol为mapcontrol控件
{
MessageBox.Show("请添加栅格图层");
}
else
{
string layername = DHmapcontrol.Map.Layer[0].Name; MessageBox.Show(layername);//图层名称

IRasterLayer rasterlayer = new RasterLayerClass();
rasterlayer = (IRasterLayer)DHmapcontrol.Map.Layer[0];
IRaster raster = rasterlayer.Raster;
IRasterProps rasterprops = (IRasterProps)raster;
int height = rasterprops.Height;//栅格行
int width = rasterprops.Width;//栅格列
long cont = height * width;//栅格总数
MessageBox.Show(Convert.ToString(cont));

}