How to receive selected object data from AutoCAD with mouse wheel enabled (PromptSelection / SendStringToExecute)

[Soojung_Kim]

Hi, I'm fairly new to writing an add-in with .NET for AutoCAD.

In this tool, I want to ask the user to select objects in the drawing and receive that object data back to my code.

I know the PromptSelection method allows that, but when I use that, I can't use the mouse wheel to move or pan. I can only zoom in and out and select. Is there a way to 'unlock' the mouse wheel function?

// Request for objects to be selected in the drawing area
PromptSelectionOptions pso = new PromptSelectionOptions();
pso.MessageForAdding = "Select Pipes";                    
PromptSelectionResult acSSPrompt = ed.GetSelection(pso);

// Allows to bring back the selected objects, but mouse wheel doesn't work for pan, only works for zoom

So I've tried SendStringToExecute method because that allows me to use the mouse wheel , but then I don't know how to get the selected data back to my code.

private void GetObject_Click(object sender, RoutedEventArgs e)
{
   try
   {
      _document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
      _document.SendStringToExecute("GETOBJECT ", false, false, true);
    }

    finally
    {
    }
            
}


[CommandMethod("GETOBJECT")]
public void GetObject()
{
   Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
   DocumentLock dl = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
   var ed = doc.Editor;
   using (Transaction ts = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
   {
      try
      {
        // Request for objects to be selected in the drawing area
        PromptSelectionOptions pso = new PromptSelectionOptions();
        pso.MessageForAdding = "Select Pipes";
        PromptSelectionResult acSSPrompt = ed.GetSelection(pso);
        // how do I use this data back in my code?

      }
    }
}

Can someone please share some ideas? 

Thanks! 

[quangpt.tric]

Hi @Soojung_Kim ,

you can add list<Entity> of your selection, and use this code:

Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ed.SetImpliedSelection(lstEnts.Select(ent => ent.ObjectId).ToArray());

[essam-salah · Accepted solution]

hi @Soojung_Kim 

public class SomeClass
    {
        ObjectId[] _currentSelection;

        private void GetObject_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                _document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
                _document.SendStringToExecute("GETOBJECT ", false, false, true);

                if (_currentSelection == null)
                    return;

                //// TO DO
                //using (var tr = _document.Database.TransactionManager.StartTransaction())
                //{
                //    foreach (var id in _currentSelection)
                //    {
                //        var obj = id.GetObject(OpenMode.ForWrite) as Line;


                //    }

                //    tr.Commit();
                //}
            }

            finally
            {
            }
        }
        [CommandMethod("GETOBJECT")]
        public void GetObject()
        {
            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            DocumentLock dl = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
            var ed = doc.Editor;
            using (Transaction ts = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
            {
                
                // Request for objects to be selected in the drawing area
                PromptSelectionOptions pso = new PromptSelectionOptions();
                pso.MessageForAdding = "Select Pipes";
                PromptSelectionResult acSSPrompt = ed.GetSelection(pso);

                // how do I use this data back in my code?

                _currentSelection = null;
                if (acSSPrompt.Status != PromptStatus.OK) 
                    return;

                _currentSelection = acSSPrompt.Value.GetObjectIds();
            }
        }


    }

[Soojung_Kim]

Thanks for the reply. I get the part where you stored the selected objects to _currentSelection. 

Now I'm having trouble with the SendStringToCommand occurring after the TO DO part. I found this thread so trying to figure out how to implement it.. https://forums.autodesk.com/t5/net/send-command-executes-after-exiting-command-method/td-p/3882929

Haven't succeeded yet, but thanks for the advice on setting the variable outside the method! 

[Soojung_Kim]

Sorry, I don't understand what you mean. Do you mean save the promptSelection output to lstEnts in your example?

[essam-salah]

Haven't succeeded yet, but thanks for the advice on setting the variable outside the method! 

you can make a new post with the specific problem part you have. 

[Soojung_Kim]

Thanks, I just made a new post regarding the issue I'm having! https://forums.autodesk.com/t5/net/question-re-send-command-executes-after-exiting-command-method/td...