C#Arcengine不使用gp服务，从一个GDB数据库中复制一个图层，然后粘贴到另一个GDB数据库

您可以使用C# ArcObjects来实现从一个GDB数据库中复制一个图层，然后粘贴到另一个GDB数据库，以下是示例代码：

// 打开源GDB数据库
IWorkspaceFactory sourceWorkspaceFactory = new FileGDBWorkspaceFactory();
IWorkspace sourceWorkspace = sourceWorkspaceFactory.OpenFromFile("C:\\data\\source.gdb", 0);

// 打开目标GDB数据库
IWorkspaceFactory targetWorkspaceFactory = new FileGDBWorkspaceFactory();
IWorkspace targetWorkspace = targetWorkspaceFactory.OpenFromFile("C:\\data\\target.gdb", 0);

// 获取源图层
IFeatureWorkspace sourceFeatureWorkspace = (IFeatureWorkspace)sourceWorkspace;
IFeatureClass sourceFeatureClass = sourceFeatureWorkspace.OpenFeatureClass("source_layer");

// 获取目标工作区
IFeatureWorkspace targetFeatureWorkspace = (IFeatureWorkspace)targetWorkspace;

// 创建目标图层
IFeatureClass targetFeatureClass = targetFeatureWorkspace.CreateFeatureClass("target_layer", sourceFeatureClass.Fields, sourceFeatureClass.CLSID, sourceFeatureClass.EXTCLSID, sourceFeatureClass.FeatureType, sourceFeatureClass.ShapeFieldName, "");

// 复制数据
IGeoDataset sourceGeoDataset = (IGeoDataset)sourceFeatureClass;
ITransferSource transferSource = new TransferSourceClass();
transferSource.SpatialReference = sourceGeoDataset.SpatialReference;
transferSource.AddLayer(sourceFeatureClass, "", "");

ITransferDestination transferDestination = new TransferDestinationClass();
transferDestination.AddLayer(targetFeatureClass, "", "");

ITransfer transfer = new TransferClass();
transfer.Transfer(transferSource, transferDestination);

// 保存目标图层
IDataset targetDataset = (IDataset)targetFeatureClass;
targetDataset.Workspace = targetWorkspace as IWorkspace;
targetFeatureClass = targetDataset as IFeatureClass;
((IDataset)targetFeatureClass).AlterSpatialReference(sourceGeoDataset.SpatialReference);
((IDataset)targetFeatureClass).Rename("target_layer");

上述代码中，首先打开源GDB数据库和目标GDB数据库，然后获取源图层和目标工作区。接着创建目标图层并复制数据到目标图层，最后保存目标图层。