topic Re: Put in a value after inserting block with attribute in .NET Forum

Put in a value after inserting block with attribute

kebby70 — Fri, 02 Apr 2021 01:39:02 GMT

I'd like to put in a value after inserting block with attribute.

Attribute is Number.

Insert 5 block, each number is automatically increasing.

Below is my code.

Inserted block is success, I'dont know how to put in a value to attribute.

[CommandMethod("uuu", CommandFlags.NoHistory)]
public void BlockSimple()
{
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acDocDb = acDoc.Database;
Editor acDocEd = acDoc.Editor;
Database workingDB = HostApplicationServices.WorkingDatabase;

string fpFile = @"C:\LIBRARY\FP_TEST.dwg";
string fpBlock = @"FP_TEST";

using (DocumentLock acLckDoc = acDoc.LockDocument())
{
using (Transaction acTrans = acDocDb.TransactionManager.StartTransaction())
{
Database db = null;
db = new Database(false, false);
db.ReadDwgFile(fpFile, System.IO.FileShare.Read, true, null);

ObjectId NewBlkId = new ObjectId();
NewBlkId = acDocDb.Insert(fpBlock, db, false);

BlockTable bt = (BlockTable)acTrans.GetObject(acDocDb.BlockTableId, OpenMode.ForWrite, true);
BlockTableRecord btr = (BlockTableRecord)acTrans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
BlockReference blkRef = new BlockReference(new Autodesk.AutoCAD.Geometry.Point3d(0, 0, 0), NewBlkId);

btr.AppendEntity(blkRef);
acTrans.AddNewlyCreatedDBObject(blkRef, true);

AcadApplication acadApp = (AcadApplication)acApplication.Application.AcadApplication;
acadApp.ActiveDocument.SendCommand("_.ATTSYNC N " + fpBlock + "\n");
acDocEd.Regen();

db.Dispose();

acTrans.Commit();
}
}

}

Re: Put in a value after inserting block with attribute

norman.yuan — Fri, 02 Apr 2021 20:50:09 GMT

Since your code create the block reference, you do not call "ATTSYNC" to add attribute. Instead, your code should create AttributeReference based on the BlockTableRecord. Following quick code does it:

[CommandMethod("UUU", ...)]

public static CreateBlock()

{

Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acDocDb = acDoc.Database;

using (acDoc.LockDocument())

{

InsertBlock(acDocDb, "C:\\LIBRARY\\BlockFile.dwg");

}

private static InsertBlock(Database docDb, string fileName)

{

// create block definition from external block file

ObjectId blockDefId=InsertBlockDefinition(docDb, fileName);

// insert block reference

using (var tran=db.TransactionManager.StartTransaction())

{

BlockTable bt = (BlockTable)acTrans.GetObject(acDocDb.BlockTableId, OpenMode.ForWrite, true);
BlockTableRecord space =

(BlockTableRecord)acTrans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);

BlockTableRecord blockDef=

(BlockTableRecord)tran.GetObject(blockDefId, OpenMode.ForRead)

// create the block reference 5 times

for int i=1; i<=5; i++)

{

var insPt=newPoint3d(0.0, i * 10.0, 0.0);

InsertBlockReference(blockDef, insPt, space, tran, i);

}

tran.Commit();

}

private ObjectId InsertBlockDefinition(Database docDb, string fileName)

{

var id=ObjectId.Null;

using (var db=new Datyabase(false, true))

{

db.ReadDwgFile(fileName,.......);

id=docDb.Insert(

System.IO.Path.GetFielNameWithoutExtension(fileName), db, false);

}

return id;

}

private static void InsertBlockReference(

BlockTableRecord blockDef, Point3d insPt, BlockTableRecord space, Transaction tran, int num)

{

var blockRef=new BlockTableRecord(insPt, blockDef.ObjectId);

blockRef.SetDatabaseDefault();

space.Append(blockRef);

tran.AddNewlyCreatedDBObject(blockRef, true);

// following code add attributereference to the block reference, based

// on block definition

foreach (ObjectId id in blockDef)

{

var att=trans.GetObject(id, OpenMode.ForRead) as AttributeDefinition;

if (att!=null && !att.Constant)

{

var attRef=new AttributeReference();

attRef.SetAttributeFromBlock(att, blockReference.BlockTransform);

if (att.Tag.ToUpper()=="NUMBER") att.TextString=num.ToString();

blockRef.AttributeCollection.Append(attRef);

tran.AddNewlyCreatedDBObject(attRef, true);

}

The code is not tested, but you get the idea.

HTH.

Re: Put in a value after inserting block with attribute

kebby70 — Fri, 02 Apr 2021 22:41:02 GMT

Thanks a lot for your code.

I tested and found that the first block is missing attribute value.

[CommandMethod("UUU", CommandFlags.NoHistory)]
public void CreateBlock()
{
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acDocDb = acDoc.Database;

using (acDoc.LockDocument())
{
InsertBlock(acDocDb, @"C:\LIBRARY\FP_J02-019.dwg");
}
}

private void InsertBlock(Database acDocDb, string fileName)
{
// create block definition from external block file
ObjectId blockDefId = InsertBlockDefinition(acDocDb, fileName);

// insert block reference
using (var acTrans = acDocDb.TransactionManager.StartTransaction())
{
BlockTable bt = (BlockTable)acTrans.GetObject(acDocDb.BlockTableId, OpenMode.ForWrite, true);
BlockTableRecord space = (BlockTableRecord)acTrans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
BlockTableRecord blockDef = (BlockTableRecord)acTrans.GetObject(blockDefId, OpenMode.ForWrite);

// create the block reference 5 times
for (int i = 1; i <= 5; i++)
{
var insPt = new Point3d(-20.0, i * 20.0, 0.0);
InsertBlockReference(blockDef, insPt, space, acTrans, i);
}
acTrans.Commit();
}
}

private ObjectId InsertBlockDefinition(Database docDb, string fileName)
{
var id = ObjectId.Null;

using (var db = new Database(false, true))
{
db.ReadDwgFile(fileName, System.IO.FileShare.Read, true, null);
id = docDb.Insert(System.IO.Path.GetFileNameWithoutExtension(fileName), db, false);
}

return id;
}

private static void InsertBlockReference(BlockTableRecord blockDef, Point3d insPt, BlockTableRecord space, Transaction acTrans, int num)
{
var blockRef = new BlockReference(insPt, blockDef.ObjectId);

blockRef.SetDatabaseDefaults();
space.AppendEntity(blockRef);
acTrans.AddNewlyCreatedDBObject(blockRef, true);

// following code add attributereference to the block reference, based
// on block definition
foreach (ObjectId id in blockDef)
{
var att = acTrans.GetObject(id, OpenMode.ForWrite) as AttributeDefinition;

if (att != null && !att.Constant)
{
var attRef = new AttributeReference();

attRef.SetAttributeFromBlock(att, blockRef.BlockTransform);

if (att.Tag.ToUpper() == "LOC") att.TextString = num.ToString();
if (att.Tag.ToUpper() == "INST") att.TextString = "ITB";

blockRef.AttributeCollection.AppendAttribute(attRef);

acTrans.AddNewlyCreatedDBObject(attRef, true);
}
}
}

Re: Put in a value after inserting block with attribute

norman.yuan — Sat, 03 Apr 2021 00:40:04 GMT

Well, if you step through the code in debug with break point in the method InsertBlockReference(), it would be quite easy to find out why the fifth block's attributes are not added, or added but its TextString not set.

Re: Put in a value after inserting block with attribute

kebby70 — Sat, 03 Apr 2021 02:34:21 GMT

Thanks....I've resolved..

Changed to attRef

if (attRef.Tag.ToUpper() == "LOC") attRef.TextString = num.ToString();
if (attRef.Tag.ToUpper() == "INST") attRef.TextString = "ITB";