How to get all blocks from current drawing using .NET

[Anonymous]

I'm new in ObjectARX. Please give me simple code and some explanations on how to get all blocks and their attributes from current drawing using .NET (in my case C#). Great thanks!

[Arrowstick]

I'm not sure, if you still need it, but this is a possible way:

// get the working database
Database db = HostApplicationServices.WorkingDatabase;
// Start a transaction.
using (Transaction trans = db.TransactionManager.StartTransaction())
{

// Get Block Table and Block Table Record
BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
BlockTableRecord btrMS = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead);
// Now iterate through ModelSpace (means through btrMS)
foreach (ObjectId id in btrMS)
{
// Fetch the entity
Entity ent = (Entity)trans.GetObject(id, OpenMode.ForRead, false);
// Test if the entity is a BlockReference
if (ent.GetType() == typeof(BlockReference))
{
// It's a BlockReference... cast it:
BlockReference blRef = (BlockReference)ent;
// Now you can acces attributes via the AttributeCollection
// Do Something with:
blRef.AttributeCollection;
}
}
// commit Transaction
trans.Commit();

} Edited by: Arrowstick on Nov 12, 2008 3:24 PM

[Anonymous]

Thanks for posting a commented example! I see a lot
of code posted here with no supporting comments.

John

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"Arrowstick" wrote in message
href="news:6070458@discussion.autodesk.com">news:6070458@discussion.autodesk.com...

I'm
not sure, if you still need it, but this is a possible way:

// get the
working database
Database db = HostApplicationServices.WorkingDatabase;

// Start a transaction.
using (Transaction trans =
db.TransactionManager.StartTransaction())
{

// Get Block Table and Block Table Record
BlockTable bt =
(BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);

BlockTableRecord btrMS =
(BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace],
OpenMode.ForRead);
// Now iterate through ModelSpace (means through
btrMS)
foreach (ObjectId id in btrMS)
{
// Fetch the entity

Entity ent = (Entity)trans.GetObject(id, OpenMode.ForRead, false);
//
Test if the entity is a BlockReference
if (ent.GetType() ==
typeof(BlockReference))
{
// It's a BlockReference... cast it:

BlockReference blRef = (BlockReference)ent;
// Now you can acces
attributes via the AttributeCollection
// Do Something with:

blRef.AttributeCollection;
}
}
// commit Transaction

trans.Commit();

} Edited by: Arrowstick on Nov 12, 2008
3:24 PM