/// <summary>

 剔除栅格块

 /// /// </summary>

 public void ImageSieveFilte ()

 {

    FrmImageSieveFilter frmImageSieveFilter = new FrmImageSieveFilter();

    if (frmImageSieveFilter.ShowDialog() != System.Windows.Forms.DialogResult.OK) return;

 IRasterDataset dataset = DatasetFactory.OpenRasterDataset(frm.Exchange_info.InputFile, OpenMode.ReadOnly);

     if (dataset == null) return;

     ImageSieveFilter_Exchange_info info = new ImageSieveFilter_Exchange_info();//得到生成实体文件用这种方法

     info = frm.Exchange_info;

     //ImageSieveFilterDataset_Exchange_info info = new ImageSieveFilterDataset_Exchange_info();//生成缓存数据集或者该别原数据集

     //info.BModifyOriginal = false;

     //info.InputRasterDataset = dataset;

     //info.MinArea = frm.Exchange_info.MinArea;

     ISystemAlgo algo = AlgoFactory.Instance().CreateAlgo("PIE.CommonAlgo.dll", "PIE.CommonAlgo.ImageSieveFilterAlgo");

     if (algo == null) return;

     algo.Params = info;

     bool result = AlgoFactory.Instance().ExecuteAlgo(algo);

     //info = algo.Params as ImageSieveFilterDataset_Exchange_info;//得到执行后的结果输出栅格数据集,算法执行完后把结果存在   OutputRasterDataset,需要重新获取一下

     if (result)

     {

         // ILayer layer = LayerFactory.CreateDefaultRasterLayer(info.OutputRasterDataset) as ILayer;

         ILayer layer = LayerFactory.CreateDefaultLayer(info.OutputFile);

         if (layer == null) return;

         mapControlMain.ActiveView.FocusMap.AddLayer(layer);

         mapControlMain.ActiveView.PartialRefresh(ViewDrawPhaseType.ViewAll);

     }

 }