C#Arcengine不使用gp服务，在GDB数据库中复制一个图层

您好！要在C# ArcEngine中复制GDB数据库中的一个图层，可以使用以下步骤：

1. 创建一个新的工作空间对象，指定GDB数据库的路径。

IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactory();
IWorkspace workspace = workspaceFactory.OpenFromFile(@"C:\Data\MyGDB.gdb", 0);

2. 打开要复制的原始图层。

IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;
IFeatureClass sourceFeatureClass = featureWorkspace.OpenFeatureClass("SourceLayer");

3. 创建一个新的要素数据集和要素类对象，设置它们的名称和空间参考.

IWorkspace2 workspace2 = (IWorkspace2)workspace;
ISpatialReference spatialReference = sourceFeatureClass.ShapeCopy.SpatialReference;
IFeatureDataset featureDataset = workspace2.CreateFeatureDataset("MyFeatureDataset", spatialReference);
IFeatureClassDescription featureClassDescription = new FeatureClassDescriptionClass();
IObjectClassDescription objectClassDescription = (IObjectClassDescription)featureClassDescription;
IFields fields = sourceFeatureClass.Fields;
IFieldChecker fieldChecker = objectClassDescription.CreateFieldChecker();
IEnumFieldError enumFieldError = null;
IFields validatedFields = null;
fieldChecker.ValidateWorkspace = workspace;
fieldChecker.Validate(fields, out enumFieldError, out validatedFields);
IFeatureClass targetFeatureClass = featureDataset.CreateFeatureClass("TargetLayer", validatedFields, objectClassDescription.InstanceCLSID, objectClassDescription.ClassExtensionCLSID, esriFeatureType.esriFTSimple, "Shape", "");

4. 使用ITableSort接口将源图层中的要素复制到新的目标图层中

ITableSort tableSort = new TableSortClass();
tableSort.Fields = "OBJECTID";
tableSort.set_Ascending("OBJECTID", true);
tableSort.Table = sourceFeatureClass as ITable;
tableSort.QueryFilter = new QueryFilterClass();
tableSort.Sort(null);
ICursor cursor = tableSort.Rows;
IFeatureBuffer featureBuffer = targetFeatureClass.CreateFeatureBuffer();
IFeatureCursor insertCursor = targetFeatureClass.Insert(true);
while ((featureBuffer = cursor.NextFeature() as IFeatureBuffer) != null)
{
    insertCursor.InsertFeature(featureBuffer);
}
insertCursor.Flush();
System.Runtime.InteropServices.Marshal.ReleaseComObject(cursor);
System.Runtime.InteropServices.Marshal.ReleaseComObject(insertCursor);

以上代码可以复制GDB数据库中的一个图层到另一个图层，您可以根据需要进行修改。