Topic: Block Handle

[cadpro]

Hi,

Is is possible to get the block handle from an attribute reference? I get the attribute reference from a previously stored attribute collection. I did try attref.BlockId.Handle.Value.ToString(), but it gives a different value, not the block's id.

Thanks

[cadpro]

Any hints please???

Thanks

[Jeff H]

attref.BlockId.Handle will give you the Handle for the Space it is inserted in.
So Model Space's handle if inserted in  Model Space.
 
If you are wanting to get the BlockTableRecord(Block or Block Definition) Handle for the BlockReference that contains the AttributeReference in it's AttributeCollection Property then
 
You should be able to get the BlockReference from the AttributeReference.OwnerId property then
use the BlockReference.BlockTableRecord to get the Block and get its Handle.
 
 

[Jeff H]

Vb and C# code
 

Code: [Select]

        [CommandMethod("AttRefBlockName")]
         public void AttRefBlockName()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Editor ed = doc.Editor;
            Database db = doc.Database;
 
            PromptNestedEntityOptions pno = new PromptNestedEntityOptions("\nSelect a Attribute reference:");
            PromptNestedEntityResult pner = ed.GetNestedEntity(pno);
 
            if (pner.ObjectId.ObjectClass != RXClass.GetClass(typeof(AttributeReference)))
            {
                ed.WriteMessage("\nNot a Attribute Reference");
            }
 
            using (Transaction trx = db.TransactionManager.StartTransaction())
            {
 
                AttributeReference attRef = (AttributeReference)trx.GetObject(pner.ObjectId, OpenMode.ForRead);
                BlockReference bref = (BlockReference)trx.GetObject(attRef.OwnerId, OpenMode.ForRead);
                BlockTableRecord btr = (BlockTableRecord)trx.GetObject(bref.BlockTableRecord, OpenMode.ForRead);
 
                ed.WriteMessage("\nBlock Name: {0}     Handle: {1}", btr.Name, btr.Handle.ToString());
 
                trx.Commit();

            }
       
        }


Code: [Select]

        <CommandMethod("AttRefBlockNameVb")> _
        Public Sub AttRefBlockNameVb()
            Dim doc As Document = Application.DocumentManager.MdiActiveDocument
            Dim ed As Editor = doc.Editor
            Dim db As Database = doc.Database
 
            Dim pno As New PromptNestedEntityOptions(vbLf & "Select a Attribute reference:")
            Dim pner As PromptNestedEntityResult = ed.GetNestedEntity(pno)
 
            If pner.ObjectId.ObjectClass <> RXClass.GetClass(GetType(AttributeReference)) Then
                ed.WriteMessage(vbLf & "Not a Attribute Reference")
            End If
 
            Using trx As Transaction = db.TransactionManager.StartTransaction()
                Dim attRef As AttributeReference = trx.GetObject(pner.ObjectId, OpenMode.ForRead)
                Dim bref As BlockReference = trx.GetObject(attRef.OwnerId, OpenMode.ForRead)
                Dim btr As BlockTableRecord = trx.GetObject(bref.BlockTableRecord, OpenMode.ForRead)
 
                ed.WriteMessage("{0}Block Name: {1}     Handle: {2}", Environment.NewLine, btr.Name, btr.Handle.ToString())
 
                trx.Commit()

            End Using
        End Sub