Plant SDK: Get ObjectID by PnPID

Jul 20, 2012

—

Autodesk Alumni

in AutoCAD

By Marat Mirgaleev

Issue

Is it possible to get the objectID by its PnPID or RowID?

Solution

Yes. It is a two steps process, because there is a one-to-many possibility.

PnPID and RowID are the same thing.
1. DataLinksManager.FindAcPpObjectIds(rowId) –> collection of PpObjectId
2. DataLinksManager.MakeAcDbObjectId(ppObjId) –> converts PpObjectId to ObjectId
There are various flavors of those functions. The main point to get across is that multiple AcDbObjectIds may be linked to a single RowID.

Here is a sample:

// Conversions of IDs back and forth.    //------------------------------------------------------------------    [CommandMethod("TestIds")]    public static void TestIds()    {      // Prepare to the work: Let's get some entity's ObjectId      Database db =         Application.DocumentManager.MdiActiveDocument.Database;      DataLinksManager dlm = DataLinksManager.GetManager(db);      Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;      ObjectId entId = ed.GetEntity("Pick a P&ID item: ").ObjectId;           // Now get the PnPID (i.e. PpObjectId)      //   from the selected entity's ObjectId      PpObjectId pnpId = dlm.MakeAcPpObjectId(entId);           // Now let's do an opposite action - find ObjectId(s) of the entity      int rowId1 = dlm.FindAcPpRowId(entId); // You can use ObjectId      int rowId2 = dlm.FindAcPpRowId(pnpId); //          or PpObjectId      // rowId1 and rowId2 are always equal           PpObjectIdArray ids = dlm.FindAcPpObjectIds(rowId1);      // NOTE: It returns a COLLECTION of AcPpObjectId!      //     I.e., multiple AcDbObjectIds may be linked to a single RowID           // Now find the ObjectID for each PpObjectId      foreach (PpObjectId ppid in ids)      {        ObjectId oid = dlm.MakeAcDbObjectId(ppid);        ed.WriteMessage("n oid=" + oid.ToString());      }    } // TestIds()

Comments

One response to “Plant SDK: Get ObjectID by PnPID”

Martin Buss

September 8, 2015
Can you tell me what is the background of that there can be more than one objects found for a single pnpID ? Because e.g. in the p&id drawing, there will be a rowid created for every single part that I place there.
And from the PnIDCreateSline example in the Helper class I can see the following method, which clearly assumes that there is just one objectId associated with a rowID.
```
public static ObjectId ConvertRowIdToObjectId(int iRowId)
{
// Fetch ObjectId of part.
//
var res = Helper.ActiveDataLinksManager.FindAcPpObjectIds(iRowId);
var pnidId = res.First.Value;
ObjectId pnidObjectId = Helper.ActiveDataLinksManager.MakeAcDbObjectId(pnidId);
return pnidObjectId;
}
```
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Plant SDK: Get ObjectID by PnPID

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