Hello again,
I've come up with the following code for redefining dynamic blocks:
- Redefine dynamic block (not in code).
- Store dynamic property values of each block reference.
- Reset each block reference to 'apply' the newly redefined block.
- Set the stored dynamic property values.
* Calling ResetBlock and Setting dynamic property values in a single transaction results in strange behavior, so multiple transactions are required.
If anyone knows a better/more efficient way, please let me know. Thank you,
Test code:
[CommandMethod("AnalyzeDyn", CommandFlags.Session)]
public void AnalyzeDyn()
{
Document objDocument;
Database objDatabase;
DocumentLock objDocumentLock;
Transaction objTransaction;
BlockTable objBlockTable;
BlockTableRecord objBlockTableRecord;
string strMsg = "";
BlockReference objBlockReference;
Dictionary<string, object> objDictionary = new Dictionary<string, object>();
List<ObjectId> oidList = new List<ObjectId>();
double dblValue;
try
{
objDocument = CADS.Application.DocumentManager.MdiActiveDocument;
objDatabase = objDocument.Database;
using (objDocumentLock = objDocument.LockDocument())
{
using (objTransaction = objDocument.TransactionManager.StartTransaction())
{
// Get the blocktable of the database.
objBlockTable = objTransaction.GetObject(objDatabase.BlockTableId, OpenMode.ForRead) as BlockTable;
// 1: Add all blocktablerecord id's to a list.
// Then loop this list.
// You can't loop 'objBlockTable' directly because it will be altered inside the loop.
// (I think by 'ResetBlock') That will result in an endless loop.
// Reset will create a new anonymous block.
// 2: Calling 'ResetBlock' and editing dynamic properties in the same transaction causes strange results.
oidList.Clear();
foreach (ObjectId oidBlockTableRecord in objBlockTable)
{
oidList.Add(oidBlockTableRecord);
}
}
// Get each ObjectID in the blocktable.
foreach (ObjectId oidBlockTableRecord in oidList)
{
// Check if the ObjectID is anonymous.
using (objTransaction = objDocument.TransactionManager.StartTransaction())
{
objBlockTableRecord = objTransaction.GetObject(oidBlockTableRecord, OpenMode.ForRead) as BlockTableRecord;
}
if (objBlockTableRecord.IsAnonymous)
{
// Get all block references.
foreach (ObjectId oidBlockReference in objBlockTableRecord.GetBlockReferenceIds(false, false))
{
objDictionary.Clear();
if (strMsg.Length > 0) { strMsg += System.Environment.NewLine; }
using (objTransaction = objDocument.TransactionManager.StartTransaction())
{
objBlockReference = objTransaction.GetObject(oidBlockReference, OpenMode.ForWrite) as BlockReference;
// Get all properties.
foreach (DynamicBlockReferenceProperty objItem in objBlockReference.DynamicBlockReferencePropertyCollection)
{
strMsg += objItem.PropertyName.ToString();
strMsg += " = " + objItem.Value.ToString();
strMsg += " (" + objItem.Value.GetType().ToString() + ").";
// Only add items that are not readonly.
if (!objItem.ReadOnly && !objDictionary.ContainsKey(objItem.PropertyName))
{ objDictionary.Add(objItem.PropertyName, objItem.Value); }
}
// Reset.
objBlockReference.ResetBlock();
// Commit.
objTransaction.Commit();
}
using (objTransaction = objDocument.TransactionManager.StartTransaction())
{
objBlockReference = objTransaction.GetObject(oidBlockReference, OpenMode.ForWrite) as BlockReference;
foreach (DynamicBlockReferenceProperty objItem in objBlockReference.DynamicBlockReferencePropertyCollection)
{
if (!objItem.ReadOnly && objDictionary.ContainsKey(objItem.PropertyName))
{
dblValue = (double)objDictionary[objItem.PropertyName];
dblValue += 100;
objItem.Value = dblValue;
}
}
// Commit.
objTransaction.Commit();
}
}
}
}
}
//MessageBox.Show(strMsg, "Dynamic block properties.");
}//try
catch (CADR.Exception Ex)
{
MessageBox.Show("Error analyzing dynamic blocks: " + Ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
