private string createFlag(Document doc)
{
string dbnamestr = null;
Database db = doc.Database;
DBPoint flag = null;
//创建点
using (Transaction tm = db.TransactionManager.StartTransaction())
{
flag = new DBPoint(new Point3d(0, 0, 0));
flag.Layer = "-735";
flag.Visible = false;
BlockTable bt = (BlockTable)tm.GetObject(db.BlockTableId, OpenMode.ForRead);
BlockTableRecord btr = (BlockTableRecord)tm.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite, false);
btr.AppendEntity(flag);
tm.AddNewlyCreatedDBObject(flag, true);
tm.Commit();
}
////扩展数据
Guid guid = Guid.NewGuid();
DataTable dt = new DataTable();
dt.TableName = "database flag";
dt.AppendColumn(CellType.Bool, "hasDatabase");
dt.AppendColumn(CellType.CharPtr, "databaseName");
DataCellCollection row = new DataCellCollection();
DataCell hasDatabase = new DataCell();
DataCell databaseName = new DataCell();
hasDatabase.SetBool(true);
dbnamestr = guid.ToString();
databaseName.SetString(dbnamestr);
row.Add(hasDatabase);
row.Add(databaseName);
dt.AppendRow(row, true);
using (Transaction tm = db.TransactionManager.StartTransaction())
{
Entity entity = (Entity)tm.GetObject(flag.ObjectId, OpenMode.ForWrite, false);
if (entity.ExtensionDictionary == new ObjectId())
{
entity.CreateExtensionDictionary();
}
DBDictionary extensionDic = (DBDictionary)tm.GetObject(flag.ExtensionDictionary, OpenMode.ForWrite, false);
extensionDic.SetAt("database flag", dt);
tm.AddNewlyCreatedDBObject(dt, true);
////锁定，冻结图层
LayerTable lt = (LayerTable)tm.GetObject(db.LayerTableId, OpenMode.ForRead, false);
LayerTableRecord ltr = (LayerTableRecord)tm.GetObject(lt["-735"], OpenMode.ForWrite, false);
ltr.IsFrozen = true;
tm.Commit();
}
return(dbnamestr);
}