Дополнения для CaddZone

Немного доработал класс CaddZone, представленный здесь: добавил обработку нескольких версий AutoCAD (2007-2010; выйдет 2011, посмотрим и на нее). Фактической ценности - минимум, сделано только для собственного архива ;)

using System;
using System.Collections.Generic;
using System.Text;

using Autodesk.AutoCAD.Runtime;
using System.Runtime.InteropServices;
using Autodesk.AutoCAD.DatabaseServices;

namespace CaddZone.AutoCAD.DatabaseServices
{
  class DBUtils
  {

    // This is a managed workaround for getting a non-erased
    // SymbolTableRecord, when there are also erased ones with
    // the same name:

    public static ObjectId GetTableRecordId(ObjectId TableId, string Name)
    {
      ObjectId id = ObjectId.Null;
      using (Transaction tr = TableId.Database.TransactionManager.StartTransaction())
      {
        SymbolTable table = (SymbolTable)tr.GetObject(TableId, OpenMode.ForRead);
        if (table.Has(Name))
        {
          id = table[Name];
          if (!id.IsErased)
            return id;
          foreach (ObjectId recId in table)
          {
            if (!recId.IsErased)
            {
              SymbolTableRecord rec = (SymbolTableRecord)tr.GetObject(recId, OpenMode.ForRead);
              if (string.Compare(rec.Name, Name, true) == 0)
                return recId;
            }
          }
        }
      }
      return id;
    }

    // This is a much better/faster solution that P/Invokes
    // AcDbSymbolTableRecord::getAt() directly from managed code:

    public static class AcDbSymbolTable
    {
      // Acad::ErrorStatus AcDbSymbolTable::getAt(wchar_t const *, class AcDbObjectId &, bool)

      [System.Security.SuppressUnmanagedCodeSecurity]
      [DllImport("acdb17.dll", CallingConvention = CallingConvention.ThisCall, CharSet = CharSet.Unicode,
      EntryPoint = "?getAt@AcDbSymbolTable@@QBE?AW4ErrorStatus@Acad@@PB_WAAVAcDbObjectId@@_N@Z")]

      public static extern ErrorStatus getAt(IntPtr symbolTable, string name, out ObjectId id, bool getErased);
    }

    public static class AcDbSymbolTable18
    {
      // Acad::ErrorStatus AcDbSymbolTable::getAt(wchar_t const *, class AcDbObjectId &, bool)

      [System.Security.SuppressUnmanagedCodeSecurity]
      [DllImport("acdb18.dll", CallingConvention = CallingConvention.ThisCall, CharSet = CharSet.Unicode,
      EntryPoint = "?getAt@AcDbSymbolTable@@QBE?AW4ErrorStatus@Acad@@PB_WAAVAcDbObjectId@@_N@Z")]

      public static extern ErrorStatus getAt(IntPtr symbolTable, string name, out ObjectId id, bool getErased);
    }

    public static class AcDbSymbolTable17
    {
      // Acad::ErrorStatus AcDbSymbolTable::getAt(wchar_t const *, class AcDbObjectId &, bool)

      [System.Security.SuppressUnmanagedCodeSecurity]
      [DllImport("acdb17.dll", CallingConvention = CallingConvention.ThisCall, CharSet = CharSet.Unicode,
      EntryPoint = "?getAt@AcDbSymbolTable@@QBE?AW4ErrorStatus@Acad@@PB_WAAVAcDbObjectId@@_N@Z")]

      public static extern ErrorStatus getAt(IntPtr symbolTable, string name, out ObjectId id, bool getErased);
    }



    public static ObjectId GetSymbolTableRecordId(SymbolTable table, string name)
    {
      ObjectId id = ObjectId.Null;
      String AcadVer = Autodesk.AutoCAD.ApplicationServices.Application.Version.ToString();
      AcadVer = AcadVer.Substring(0, AcadVer.IndexOf("."));
      ErrorStatus es;
      switch (AcadVer)
      {
        case "17":
          es = AcDbSymbolTable17.getAt(table.UnmanagedObject, name, out id, false);
          break;
        case "18":
          es = AcDbSymbolTable18.getAt(table.UnmanagedObject, name, out id, false);
          break;
        default:
          es = AcDbSymbolTable17.getAt(table.UnmanagedObject, name, out id, false);
          break;
      }
      //ErrorStatus es = AcDbSymbolTable.getAt(table.UnmanagedObject, name, out id, false);
      return id;
    }

    public static ObjectId GetSymbolTableRecordId(ObjectId TableId, string name)
    {
      using (Transaction tr = TableId.Database.TransactionManager.StartTransaction())
      {
        SymbolTable table = (SymbolTable)tr.GetObject(TableId, OpenMode.ForRead);
        try
        {
          return GetSymbolTableRecordId(table, name);
        }
        finally
        {
          tr.Commit();
        }
      }
    }


  }
}