ArcGIS Pro SDK （七）编辑 8 操作栅格字段

ArcGIS Pro SDK （七）编辑 8 操作栅格字段

目录

• [ArcGIS Pro SDK （七）编辑 8 操作栅格字段](#ArcGIS Pro SDK （七）编辑 8 操作栅格字段)
• • [1 从栅格字段读取](#1 从栅格字段读取)
  • [2 将图像写入栅格字段](#2 将图像写入栅格字段)
  • [3 将压缩图像写入栅格字段](#3 将压缩图像写入栅格字段)

环境：Visual Studio 2022 + .NET6 + ArcGIS Pro SDK 3.0

1 从栅格字段读取

QueuedTask.Run(() =>
               {
                   var sel = MapView.Active.Map.GetSelection();

                   // 从栅格字段读取栅格作为 InteropBitmap
                   // 该位图可以用作图像源或写入磁盘
                   var insp = new ArcGIS.Desktop.Editing.Attributes.Inspector();
                   insp.Load(sel.ToDictionary().Keys.First(), sel.ToDictionary().Values.First());
                   var ibmp = insp["Photo"] as System.Windows.Interop.InteropBitmap;
               });

2 将图像写入栅格字段

QueuedTask.Run(() =>
               {
                   var sel = MapView.Active.Map.GetSelection();

                   // 将图像插入栅格字段
                   // 图像将以无压缩方式写入
                   var insp = new ArcGIS.Desktop.Editing.Attributes.Inspector();
                   insp.Load(sel.ToDictionary().Keys.First(), sel.ToDictionary().Values.First());
                   insp["Photo"] = @"e:\temp\Hydrant.jpg";

                   var op = new EditOperation();
                   op.Name = "Raster Inspector";
                   op.Modify(insp);
                   op.Execute();
               });

3 将压缩图像写入栅格字段

QueuedTask.Run(() =>
               {
                   // 打开磁盘上的栅格数据集并创建压缩栅格值数据集对象
                   var dataStore = new ArcGIS.Core.Data.FileSystemDatastore(new ArcGIS.Core.Data.FileSystemConnectionPath(new System.Uri(@"e:\temp"), ArcGIS.Core.Data.FileSystemDatastoreType.Raster));
                   using (var fileRasterDataset = dataStore.OpenDataset<ArcGIS.Core.Data.Raster.RasterDataset>("Hydrant.jpg"))
                   {
                       var storageDef = new ArcGIS.Core.Data.Raster.RasterStorageDef();
                       storageDef.SetCompressionType(ArcGIS.Core.Data.Raster.RasterCompressionType.JPEG);
                       storageDef.SetCompressionQuality(90);

                       var rv = new ArcGIS.Core.Data.Raster.RasterValue();
                       rv.SetRasterDataset(fileRasterDataset);
                       rv.SetRasterStorageDef(storageDef);

                       var sel = MapView.Active.Map.GetSelection();

                       // 将栅格值对象插入栅格字段
                       var insp = new ArcGIS.Desktop.Editing.Attributes.Inspector();
                       insp.Load(sel.ToDictionary().Keys.First(), sel.ToDictionary().Values.First());
                       insp["Photo"] = rv;

                       var op = new EditOperation();
                       op.Name = "Raster Inspector";
                       op.Modify(insp);
                       op.Execute();
                   }
               });