Select element faces using a Form

[Anonymous]

Hi All, 

I'm trying to achieve the selection of element faces using a custom form. The procedure is as follows:

1.- When the user starts the script, the form pops up with different buttons to select different things.

2.- In this selection of elements and parameter, the user sets up the info that the code will use to perform certain tasks.

3.- When the user hits "OK" button, the code starts to make the operations and after some time it gets the result.

Simple as that.

The issue is this. When I start the code, the form pops up but when I press the button to select the element faces the form stays on the screen and is blocking the user to pick these objects.

This es my Command.cs:

#region Namespaces
using System;
using System.Collections.Generic;
using System.Diagnostics;
using dBox = System.Windows.Forms;
using System.Windows.Forms;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Structure;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;
#endregion

namespace BarraHorPAPA
{
    [Transaction(TransactionMode.Manual)]
    public class Command : IExternalCommand
    {
        public Result Execute(
          ExternalCommandData commandData,
          ref string message,
          ElementSet elements)
        {
            UIApplication uiapp = commandData.Application;
            UIDocument uidoc = uiapp.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application app = uiapp.Application;
            Document doc = uidoc.Document;

            frmHorPAPA f = new frmHorPAPA(uiapp);

            try
            {
                if (f.ShowDialog() == DialogResult.OK)
                {
                    //Llama al formulario para la obtención de datos.            
                    List<ElementId> ids = f.getCaras();
                    List<Element> lstCaras = new List<Element>();

                    using (Transaction tx = new Transaction(doc))
                    {
                        tx.Start("Seleccionar Caras.");

                        foreach (ElementId eid in ids)
                        {
                            Element ele = doc.GetElement(eid);
                            lstCaras.Add(ele);
                        }

                        tx.Commit();

                        TaskDialog.Show("test", lstCaras.Count.ToString());
                    }

                }
            }
            catch (Exception ex)
            {
                TaskDialog.Show(" Info ", ex.GetType().Name + " " + ex.Message);
            }

            return Result.Succeeded;
        }
    }
}

and this is my form:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Structure;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;

namespace BarraHorPAPA
{
    public partial class frmHorPAPA : System.Windows.Forms.Form
    {
        List<ElementId> lstCaras;
        UIApplication uiapp;
        UIDocument uidoc;
        Autodesk.Revit.ApplicationServices.Application app;
        Document doc;

        // se trae UIApplication desde el Command - que posee CommandData.
        public frmHorPAPA(UIApplication uiApp)
        {
            InitializeComponent();
            uiapp = uiApp;
            uidoc = uiApp.ActiveUIDocument;
            app = uiapp.Application;
            doc = uidoc.Document;
        }
        
        private void frmHorPAPA_Load(object sender, EventArgs e)
        {
            lstCaras = null;
        }

        private void btnCaras_Click(object sender, EventArgs e)
        {
            IList<Reference> caras = uidoc.Selection.PickObjects(ObjectType.Face, "Selecciona las caras de los limites");
            List<ElementId> ids = (from Reference r in caras select r.ElementId).ToList();
            foreach (ElementId eid in ids)
            {
                lstCaras.Add(eid);
            }
        }

        #region MÉTODOS PARA EL ENVIO DE VARIABLES AL COMMAND

        public List<ElementId> getCaras()
        {
            return lstCaras;
        }

        #endregion

        private void btnOK_Click(object sender, EventArgs e)
        {

        }
    }
}

What would you recommend to do in this case, to achieve what I'm trying to do?

Thanks in advance!

[BardiaJahan · Accepted solution]

You are using a modal form. The command shows the form in a modal way waiting for the form to report back DialogResult.Ok and your form does not do that upon clicking on that button. In this case, I would use a modeless form. See:

http://thebuildingcoder.typepad.com/blog/2011/09/modeless-forms-in-revit.html

[Anonymous]

Thanks @BardiaJahan! I'll follow your directions.

Cheers!