Deleting levels using WindowsForm

Anonymous · ‎09-24-2020

Hello all,

I am trying to write an add-in that brings up a WindowsForm that has a list of check boxes that the user can select to determine which levels (and reference planes) they want to be removed from the project. I have created an ArrayList with the Element Ids for both the levels and planes. It is listed below as ArrayList.cs. I have also listed my the class I am trying to use to delete the elements. It is labeled BasementDeleteElements.cs. I am struggling with getting the asementDeleteElements.cs to access the array and then to use the variables in the array as the Element Ids for Revit to delete. I am very new to C# and would appreciate all the help I can get.

ArrayList.cs

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

class ArrayListLevels
{

    // Main Method 
    public static void Main(String[] args)
    {


        #region Basment
        // create basement array list 
        ArrayList BasementList = new ArrayList();

        // add elements to array list
        BasementList.Add("1600991");
        BasementList.Add("1601000");
        BasementList.Add("1600999");
        BasementList.Add("1600996");
        BasementList.Add("1600997");
        BasementList.Add("1600998");
        #endregion

        #region Level one
        // create level one array list 
        ArrayList OneList = new ArrayList();

        // add elements to array list
        OneList.Add("1460");
        OneList.Add("1363089");
        OneList.Add("1534822");
        OneList.Add("1363104");
        OneList.Add("1362898");
        OneList.Add("1363074");
        #endregion

        #region Level Two
        // create level two array list 
        ArrayList TwoList = new ArrayList();

        // add elements to array list
        TwoList.Add("1287144");
        TwoList.Add("1363704");
        TwoList.Add("1534823");
        TwoList.Add("1363719");
        TwoList.Add("1363560");
        TwoList.Add("1363689");
        #endregion

        #region Level Three
        // create level three array list 
        ArrayList ThreeList = new ArrayList();

        // add elements to array list
        ThreeList.Add("1287185");
        ThreeList.Add("1364100");
        ThreeList.Add("1534824");
        ThreeList.Add("1364115");
        ThreeList.Add("1363988");
        ThreeList.Add("1364085");
        #endregion

        #region Level Four
        // create level four array list 
       ArrayList FourList = new ArrayList();

        // add elements to array list
        FourList.Add("1287204");
        FourList.Add("1671040");
        FourList.Add("1671042");
        FourList.Add("1671041");
        FourList.Add("1364404");
        FourList.Add("1671039");
        #endregion

        #region Level Five
        // create level five array list 
       ArrayList FiveList = new ArrayList();

        // add elements to array list
        FiveList.Add("1287223");
        FiveList.Add("1671045");
        FiveList.Add("1671047");
        FiveList.Add("1671046");
        FiveList.Add("1364499");
        FiveList.Add("1671044");
        #endregion

        #region Level Six
        // create level six array list 
        ArrayList SixList = new ArrayList();

        // add elements to array list
        SixList.Add("1287241");
        SixList.Add("1671050");
        SixList.Add("1671052");
        SixList.Add("1671051");
        SixList.Add("1364600");
        SixList.Add("1671049");
        #endregion

        #region Level Seven
        // create level seven array list 
       ArrayList SevenList = new ArrayList();

        // add elements to array list
        SevenList.Add("1287259");
        SevenList.Add("1671055");
        SevenList.Add("1671057");
        SevenList.Add("1671056");
        SevenList.Add("1364732");
        SevenList.Add("1671054");
        #endregion

        #region Level Eight
        // create level eight array list 
       ArrayList EightList = new ArrayList();

        // add elements to array list
        EightList.Add("1287278");
        EightList.Add("1671060");
        EightList.Add("1671062");
        EightList.Add("1671061");
        EightList.Add("1364825");
        EightList.Add("1671059");
        #endregion

        #region Roof
        // create roof array list 
        ArrayList RooftList = new ArrayList();

        // add elements to array list
        RooftList.Add("62406");
        #endregion
    }
}

BasementDeleteElements.cs

#region Namespaces
using System;
using System.Collections.Generic;
using System.Linq;
using Autodesk.Revit.DB;
#endregion

namespace LevelDeleteForm
{

    #region Basement Level


    class BasementDeleteElements
    {
            public void DeleteElement(Document doc)
        {
            Element element = FindElementByName(doc, typeof(Level), "1600991");

            using (Transaction t = new Transaction(doc, "Delete element"))
            {
                t.Start();
                doc.Delete(element.Id);
                t.Commit();
            }
        }

        public void DeleteElements(Document doc)
        {
            List<Level> levels = GetLevels(doc);
            List<ElementId> idSelection = new List<ElementId>();

            foreach (Level l in levels)
            {
                Element e = l as Element;

                idSelection.Add(e.Id);
            }
            using (Transaction t = new Transaction(doc, "Delete element"))
            {
                t.Start();
                doc.Delete(idSelection);
                t.Commit();
            }
        }


        public List<Level> GetLevels(Document doc)
        {
            FilteredElementCollector collector = new FilteredElementCollector(doc);
            ICollection<Element> Levels = collector.OfClass(typeof(Level)).ToElements();
            List<Level> List_Levels = new List<Level>();
            foreach (Level l in Levels)
            {
                List_Levels.Add(l);
            }
            return List_Levels;
        }

        public Element FindElementByName(Document doc, Type targetType, string targetName)
        {
            return new FilteredElementCollector(doc).OfClass(targetType).FirstOrDefault<Element>(e => e.Name.Equals(targetName));
        }
    }   

    #endregion 
    }

jeremytammik · ‎09-24-2020

1. Search the Internet

2. For instance, for 'access variable c# module'

3.. First hit: https://stackoverflow.com/questions/22216253/access-variable-from-another-method-in-another-class

Jeremy Tammik
Developer Technical Services
Autodesk Developer Network, ADN Open
The Building Coder