Entities Successfully Added to Group But Not Visible in screen
@rampseeker wrote:
I created entity objects in another function, then opened a transaction to add these objects to a Group.
You should also show the other function code because it might not be a good practice to get or create objects in a transaction and use these objects outside of the scope of this transaction.
You can either use the same transaction or use the ObjectIds of these objects.
Adding objects to a transaction is mainly a way to ensure the newly created objects to be disposed when the transaction is disposed.
You can avoid transactions by using the "Obsolete" ObjectId.Open() method and using statements, but I'm not sure that this makes a significant improvement.
#pragma warning disable 0618
static void LargeGroupTest(int numGroups)
{
var db = HostApplicationServices.WorkingDatabase;
var groups = new List<(ObjectId, ObjectId)>();
using (var modelSpace = (BlockTableRecord)SymbolUtilityServices.GetBlockModelSpaceId(db).Open(OpenMode.ForWrite))
{
for (int i = 0; i < numGroups; i++)
{
using (var polyline = new Polyline())
using (var text = new DBText())
{
polyline.AddVertexAt(0, new Point2d(i * 10, 0), 0, 0, 0);
polyline.AddVertexAt(1, new Point2d(i * 10 + 5, 0), 0, 0, 0);
polyline.AddVertexAt(2, new Point2d(i * 10 + 5, 5), 0, 0, 0);
polyline.AddVertexAt(3, new Point2d(i * 10, 5), 0, 0, 0);
polyline.Closed = true;
polyline.ColorIndex = 2;
var plineId = modelSpace.AppendEntity(polyline);
text.Position = new Point3d(i * 10 + 2.5, 2.5, 0);
text.Height = 1.0;
text.TextString = $"ID {i}";
var textId = modelSpace.AppendEntity(text);
groups.Add((plineId, textId));
}
}
}
using (var goupDict = (DBDictionary)db.GroupDictionaryId.Open(OpenMode.ForWrite))
{
for (int i = 0; i < groups.Count; i++)
{
string groupName = $"Large_Group_Example_{i + 1}";
(var plineId, var textId) = groups[i];
using (var group = new Group(groupName, true))
{
group.Append(plineId);
group.Append(textId);
goupDict.SetAt(groupName, group);
}
}
}
}
#pragma warning restore 0618
From the tests I did, the way you purpose is slightly slower than the one I posted. Opening the group dictionary at each iteration has certainly some overhead.
It also seems to me that creating all entities in a first time and all groups in a second one is a little faster than creating the entities and the group at each iteration (below, the method I compared to the one given above).
static void LargeGroupTest1(int numGroups)
{
var db = HostApplicationServices.WorkingDatabase;
using (var modelSpace = (BlockTableRecord)SymbolUtilityServices.GetBlockModelSpaceId(db).Open(OpenMode.ForWrite))
using (var goupDict = (DBDictionary)db.GroupDictionaryId.Open(OpenMode.ForWrite))
{
for (int i = 0; i < numGroups; i++)
{
ObjectId plineId, textId;
using (var polyline = new Polyline())
using (var text = new DBText())
{
polyline.AddVertexAt(0, new Point2d(i * 10, 0), 0, 0, 0);
polyline.AddVertexAt(1, new Point2d(i * 10 + 5, 0), 0, 0, 0);
polyline.AddVertexAt(2, new Point2d(i * 10 + 5, 5), 0, 0, 0);
polyline.AddVertexAt(3, new Point2d(i * 10, 5), 0, 0, 0);
polyline.Closed = true;
polyline.ColorIndex = 2;
plineId = modelSpace.AppendEntity(polyline);
text.Position = new Point3d(i * 10 + 2.5, 2.5, 0);
text.Height = 1.0;
text.TextString = $"ID {i}";
textId = modelSpace.AppendEntity(text);
}
string groupName = $"Large_Group_Example_{i + 1}";
using (var group = new Group(groupName, true))
{
group.Append(plineId);
group.Append(textId);
goupDict.SetAt(groupName, group);
}
}
}
}
