C#+AE 用MapControl加载栅格格式文件

 System.Windows.Forms.OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "*.bmp|*.bmp|*.jpg|*.jpg|*.tif|*.tif";
            ofd.ShowDialog();


           

string filePath = ofd.FileName;

//此两个路径和文件名作为参数：

  string pathName = System.IO.Path.GetDirectoryName(filePath);
            string fileName = System.IO.Path.GetFileName(filePath);

 

//定义工作空间工厂并实例化：

            IWorkspaceFactory pWSF;
            pWSF = new RasterWorkspaceFactoryClass();

//

            IWorkspace pWS;
            pWS = pWSF.OpenFromFile(pathName,0);

            IRasterWorkspace pRWS;
            pRWS = pWS as IRasterWorkspace;


            IRasterDataset pRasterDataset;
            pRasterDataset = pRWS.OpenRasterDataset(fileName);

            //影像金字塔的判断与创建
            IRasterPyramid pRasPyrmid;
            pRasPyrmid = pRasterDataset as IRasterPyramid;

            if(pRasPyrmid!=null)
            {
                if(!(pRasPyrmid.Present))
                {
                    pRasPyrmid.Create();
                }
            }

            IRaster pRaster;
            pRaster = pRasterDataset.CreateDefaultRaster();

            IRasterLayer pRasterLayer;
            pRasterLayer = new RasterLayerClass();
            pRasterLayer.CreateFromRaster(pRaster);

            ILayer pLayer = pRasterLayer as ILayer;
            axMapControl1.AddLayer(pLayer,0);