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SymbolUtilityServices.GetBlockModelSpaceId

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Kerry:
From my Saturday reading ..

public sealed class SymbolUtilityServices
Name: Autodesk.AutoCAD.DatabaseServices.SymbolUtilityServices
Assembly: acdbmgd, Version=17.1.0.0

has a Method
public static ObjectId GetBlockModelSpaceId(Database databasePointer);

In the past , to open Modelspace for Write, I've used something like the following, in one of several variations

--- Code: ---            ObjectId objId = new ObjectId();

            Database Db = HostApplicationServices.WorkingDatabase;
            AcDb.TransactionManager Tm = Db.TransactionManager;
            using (Transaction tr = Tm.StartTransaction())
            {
                BlockTable tb = (BlockTable)Tm.GetObject
                  (Db.BlockTableId, OpenMode.ForRead, false);
                objId = ((BlockTableRecord)Tm.GetObject
                  (tb[BlockTableRecord.ModelSpace], OpenMode.ForWrite, false)).AppendEntity(ent);
                Tm.AddNewlyCreatedDBObject(entToWriteToDataBase, true);
                tr.Commit();
            }
--- End code ---

however, using SymbolUtilityServices.GetBlockModelSpaceId seems a little easier ..


--- Code: ---            ObjectId objId = new ObjectId();
            Database Db = HostApplicationServices.WorkingDatabase;
            AcDb.TransactionManager Tm = Db.TransactionManager;
            using (Transaction tr = Tm.StartTransaction())
            {
                objId = ((BlockTableRecord)Tm.GetObject(AcDb.SymbolUtilityServices.GetBlockModelSpaceId(Db),
                        OpenMode.ForWrite, false)).AppendEntity(ent);
                Tm.AddNewlyCreatedDBObject(ent, true);
                tr.Commit();
            }
--- End code ---

edit for fatFingerSpelling

Kerry:
So, an Entity extension Class ( similar to previously posted by Daniel M )


--- Code: ---// CodeHimBelongaKwb ©  Dec 2007
// D:\Development\Visual Studio 2008\CAD Projects\Sat1215\Sat1215\EntityExtensions.cs
using System;

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;

using AcadApp = Autodesk.AutoCAD.ApplicationServices.Application;
using AcDb = Autodesk.AutoCAD.DatabaseServices;

namespace Sat1215
{
    public static partial class EntityExtensions
    {
        internal static ObjectId AddToModelSpace(this Entity ent)
        {
            ObjectId objId = new ObjectId();
            Database Db = HostApplicationServices.WorkingDatabase;
            AcDb.TransactionManager Tm = Db.TransactionManager;
            using (Transaction tr = Tm.StartTransaction())
            {
                objId = ((BlockTableRecord)Tm.GetObject(AcDb.SymbolUtilityServices.GetBlockModelSpaceId(Db),
                        OpenMode.ForWrite, false)).AppendEntity(ent);
                Tm.AddNewlyCreatedDBObject(ent, true);
                tr.Commit();
            }
            return objId;
        }

        internal static ObjectId AddToModelSpace(this Entity ent , Database Db)
        {
            ObjectId objId = new ObjectId();
            AcDb.TransactionManager Tm = Db.TransactionManager;
            using (Transaction tr = Tm.StartTransaction())
            {
                objId = ((BlockTableRecord)Tm.GetObject( AcDb.SymbolUtilityServices.GetBlockModelSpaceId(Db),
                        OpenMode.ForWrite, false)).AppendEntity(ent);
                Tm.AddNewlyCreatedDBObject(ent, true);
                tr.Commit();
            }
            return objId;
        }
    }
}
--- End code ---

and to Test it ....


--- Code: ---// CodeHimBelongaKwb ©  Dec 2007
// D:\Development\Visual Studio 2008\CAD Projects\Sat1215\Sat1215\Commands.cs
using System;

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;

using AcadApp = Autodesk.AutoCAD.ApplicationServices.Application;
using AcDb = Autodesk.AutoCAD.DatabaseServices;

 [assembly: CommandClass(typeof(Sat1215.Commands))]

namespace Sat1215
{
    class Commands
    {
        [CommandMethod("test")]
        static public void cmdtest()
        {
            Line ln = new Line(new Point3d(0, 0, 0), new Point3d(100, 100, 0));
            ln.AddToModelSpace();

            Database Db = HostApplicationServices.WorkingDatabase;
            ln = new Line(new Point3d(100, 100, 0), new Point3d(100, 200, 0));
            ln.AddToModelSpace(Db);
        }
    }
}
--- End code ---


The partial classes are irrelevant to the use of the Method, I'm just playing with them here..

MP:
I'll be getting back into C# down the road, so I'm thanking you, Daniel ... in advance, for surely this stuff will be useful to me.

Kerry:
and a piccy of some of the OTHER Methods and Properties available

Kerry:
Though, thinking of extension classes ...

This is pretty efficient  AND cool ..


--- Code: ---       internal static ObjectId ModelSpaceId(this Database Db)
        {
            return SymbolUtilityServices.GetBlockModelSpaceId(Db);
        }
--- End code ---

Piccy Added ..

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