https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12335147#M6786 <P>maybe you're looking for BlockReference.GeometryExtentsBestFit()&nbsp; ?</P><P>that applies a transformation, otherwise you can iterate the block and get the extent of each entity.</P> Fri, 27 Oct 2023 10:14:48 GMT daniel_cadext 2023-10-27T10:14:48Z https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12335021#M6785 <P><SPAN>I am using the following code to calculate the dimensions of a block definition, but 'bounds' is always null. What could be the issue?</SPAN></P><P>&nbsp;</P><P><SPAN>The blockReference object is obtained through Editor.GetSelection()</SPAN></P><P>&nbsp;</P><LI-CODE lang="csharp">double width = 0; double height = 0; Database db = HostApplicationServices.WorkingDatabase; using (Transaction tr = db.TransactionManager.StartTransaction()) { BlockReference blockRef = blockReference.ObjectId.GetObject(AcDb.OpenMode.ForRead) as BlockReference; if (blockRef != null) { string blockName = blockRef.Name; BlockTable blockTable = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; if (blockTable.Has(blockName)) { ObjectId blockDefId = blockTable[blockName]; BlockTableRecord blockDef = tr.GetObject(blockDefId, OpenMode.ForRead) as BlockTableRecord; if (blockDef != null) { Extents3d? bounds = blockDef.Bounds; if (bounds != null) { width = bounds.Value.MaxPoint.X - bounds.Value.MinPoint.X; height = bounds.Value.MaxPoint.Y - bounds.Value.MinPoint.Y; } else { AcAp.ShowAlertDialog("Block Bounds is null.\n"); } } } tr.Commit(); } }</LI-CODE><P>&nbsp;</P><P>&nbsp;</P> Fri, 27 Oct 2023 08:59:09 GMT https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12335021#M6785 zhengyunyang2019 2023-10-27T08:59:09Z https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12335147#M6786 <P>maybe you're looking for BlockReference.GeometryExtentsBestFit()&nbsp; ?</P><P>that applies a transformation, otherwise you can iterate the block and get the extent of each entity.</P> Fri, 27 Oct 2023 10:14:48 GMT https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12335147#M6786 daniel_cadext 2023-10-27T10:14:48Z https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12342259#M6787 <LI-CODE lang="csharp">var br = new Block reference(blockdefId, Point3d.Origin); var bound = br.bound.value;</LI-CODE> Tue, 31 Oct 2023 03:19:59 GMT https://forums.autodesk.com/t5/net-forum/how-to-calculate-the-length-and-width-of-a-block-definition/m-p/12342259#M6787 cuongtk2 2023-10-31T03:19:59Z