如何在ArcMap / C＃中从Windows剪贴板获取选定的要素/几何？

我在ArcMap 10中有一个自定义工具。工作流如下：

• 使用“按矩形选择要素”工具在图层中选择要素
• 使用STRG + c将功能部件复制到剪贴板
• 选择自定义工具
• 该工具检查剪贴板。如果在剪贴板中找到复制的功能，则工作流程会更改

我在http://kiwigis.blogspot.com/2011/07/how-to-create-drop-target-for-layers-in.html上找到了一个示例，其中使用拖放实现了类似的内容。

按照并修改示例，并尝试使用STRG + c将ArcMap中的TOC中的图层复制到剪贴板对我来说是可行的：

//Get the Data from the Clipboard
IDataObject clipBoardDataObject = Clipboard.GetDataObject();

//The format of the object data is "ESRI Layers" (this can be checked using clipBoardDataObject.GetFormats();) 
MemoryStream geomStream = clipBoardDataObject.GetData("ESRI Layers") as MemoryStream;                
byte[] bytes = geomStream.ToArray();

IMemoryBlobStreamVariant memoryBlobStreamVariant = new MemoryBlobStreamClass();
memoryBlobStreamVariant.ImportFromVariant(bytes);
IMemoryBlobStream2 memoryBlobStream = memoryBlobStreamVariant as IMemoryBlobStream2;
IStream stream = memoryBlobStream as IStream;
IObjectStream objectStream = new ObjectStreamClass();
objectStream.Stream = stream;

byte pv;
uint cb = sizeof(int);
uint pcbRead;

objectStream.RemoteRead(out pv, cb, out pcbRead);
int count = Convert.ToInt32(pv);

//Guid you find in the ESRI ILayer Interface
Guid iLayerGuid = new Guid("34C20002-4D3C-11D0-92D8-00805F7C28B0");

for (int i = 0; i < count; i++)
{
  object o = objectStream.LoadObject(ref iLayerGuid, null);
  ILayer layer = o as ILayer;      
}

我可以将对象投射到ILayer，这可以正常工作！

尝试使用复制的功能实现相同效果对我来说不起作用，至少我真的不知道该怎么做。

//Get the Data from the Clipboard
IDataObject clipBoardDataObject = Clipboard.GetDataObject();

MemoryStream geomStream = clipBoardDataObject.GetData("ESRI Geometry List") as MemoryStream;                
byte[] bytes = geomStream.ToArray();

IMemoryBlobStreamVariant memoryBlobStreamVariant = new MemoryBlobStreamClass();
memoryBlobStreamVariant.ImportFromVariant(bytes);
IMemoryBlobStream2 memoryBlobStream = memoryBlobStreamVariant as IMemoryBlobStream2;
IStream stream = memoryBlobStream as IStream;
IObjectStream objectStream = new ObjectStreamClass();
objectStream.Stream = stream;

byte pv;
uint cb = sizeof(int);
uint pcbRead;

objectStream.RemoteRead(out pv, cb, out pcbRead);
int count = Convert.ToInt32(pv);

//What to do next? What object do I need to unpack to?

您会在此处看到对象格式为“ ESRI几何列表”（我无法在线找到任何信息）。那么如何才能“拆开”这个物体呢？IFeatureSelection，IFeature，IGeometry不起作用。

有任何想法吗？

我已经完成了与您的工具/工作流程类似的操作。我也无法弄清楚如何以自动方式将复制的要素定向到适当的图层。就我的情况而言，我在编辑会话中使用ArcMap命令“复制和粘贴”将选定的要素从一层移动到另一层。用户只需要执行手动步骤并定义目标层即可。