AutoCAD command in Managed C++/CLI

By Balaji Ramamoorthy

Here is a very simple example of an AutoCAD command using Managed C++. The buildable project is attached.

#pragma once
 
using namespace System;
using namespace Autodesk::AutoCAD::Runtime;
using namespace Autodesk::AutoCAD::ApplicationServices;
using namespace Autodesk::AutoCAD::EditorInput;
using namespace Autodesk::AutoCAD::DatabaseServices;
 
namespace MgdCpp 
{
    public ref class MyClass
    {
        public:
 
        MyClass()
        {
        }
 
        [CommandMethod("MyCommand")]
        static void MyCommand()
        {
            DocumentCollection ^ docMgr 
                    = Application::DocumentManager;
            Document ^ doc 
                    = docMgr->MdiActiveDocument;
            Database ^ db 
                    = doc->Database;
            Editor ^ ed = doc->Editor;
 
            PromptEntityResult ^per 
                    = ed->GetEntity("Select an entity : ");
            if (per->Status != PromptStatus::OK)
                return;
 
            ObjectId oid = per->ObjectId;
 
            Transaction ^tr 
                = db->TransactionManager->StartTransaction();
 
            Entity ^ent 
                = (Entity ^)tr->GetObject(oid, OpenMode::ForRead);
 
            ed->WriteMessage(ent->GetRXClass()->Name);
 
            tr->Commit();
            tr->~Transaction();
        }
    };
}
 
[assembly: CommandClass(MgdCpp::MyClass::typeid)];

Download MgdCpp