topic Re: Insert Multiple Blocks Within One DWG in .NET Forum

Insert Multiple Blocks Within One DWG

Hugh_Compton — Fri, 01 Jun 2012 11:55:49 GMT

I'm trying to get a routine that creates and inserts a copy of all the block entities in a DWG. For some reason the code causes CAD to hang? See attachment for code.

Re: Insert Multiple Blocks Within One DWG

Alfred.NESWADBA — Fri, 01 Jun 2012 12:32:31 GMT

Hi,

you scan all BlockTableRecords, and within them for all Blockreferences.

Eg. if ModelSpace has a BlockReference included you insert a new BlockReference based on the current one and so you have an endless loop.

With other words:

we start with ModelSpace having 1 BlockReference
You found it and insert this one in ModelSpace
Now you have two BlockRefences in Modelspace
Next you make as step forward in your loop and find your second BlockReference
From that you create a third one
and so on .... endless

Back to the roots, what should this code do?

If you want to make a list of all blockdefinitions then just go through your BlockTable, and each BlockTableRecord, that is not of type layout, create a BlockReference in ModelSpace.

- alfred -

Re: Insert Multiple Blocks Within One DWG

Hugh_Compton — Fri, 01 Jun 2012 13:05:31 GMT

Thanks for the hints. I've tried to get the block obejct IDs first and then do the inserting afterwards (see attached) but CAD still hangs 😞

Re: Insert Multiple Blocks Within One DWG

Hugh_Compton — Fri, 01 Jun 2012 13:44:39 GMT

I've attached another attempt, using someone elses code for a block inserting sub but it still doesn't work...... very confused.....

Re: Insert Multiple Blocks Within One DWG

Alfred.NESWADBA — Fri, 01 Jun 2012 15:08:07 GMT

Hi,

can you first try to explain what you like to do?

- alfred -

Re: Insert Multiple Blocks Within One DWG

Hugh_Compton — Fri, 01 Jun 2012 15:13:16 GMT

Hi Alfred

I do schematic drawings that have blocks representing valves / fittings etc. Once the blocks are in position it is useful to create a legend. To create the legend I have to insert one of each block in the schematic and then annotate what the block is (I have a tagging routine for the annotations that works well).

I need a routine that will grab one instance of each of the blocks in modelspace and reinsert at a new location selected by me.

Re: Insert Multiple Blocks Within One DWG

chiefbraincloud — Fri, 01 Jun 2012 16:57:57 GMT

In your revision code, you were still adding items to the blockTableRecord while looping through it.

In Attempt 3, all I see is that the dictionary entries are required to be unique. I am assuming that you have more than one of each block in modelspace, so the second time you find the same block, you are getting a duplicate key exception.

you need to test the dictionary contents before adding each Id/name pair.

if not dict.ContainsKey(id) then dict.add(id,name)

If you are using 2009 or newer AutoCAD, then you could also benefit from using ObjectID.ObjectClass.Name to type test the objects before opening them, instead of opening everything.

Re: Insert Multiple Blocks Within One DWG

David125 — Thu, 06 Dec 2018 19:12:35 GMT

Super easy, no lisp required. Xref all blocks in at one time on same coordinates and bind them afterward. I do it frequently.