using System;
using System.IO;
using System.Windows.Forms;
using System.Collections;
using System.Collections.Generic;

using Autodesk.Revit;
using Autodesk.Revit.DB;
using ELEMENTSET = Autodesk.Revit.DB.ElementSet;
using PARAMETER = Autodesk.Revit.DB.Parameter;
using Autodesk.Revit.Structural.Enums;
using DocCSharp.csproj;

namespace Revit.SDK.Samples.RenumbItems.CS
{
    /// <summary>
    /// Renumber items
    /// Use Filter to pick -only- equip
    /// June 2009
    /// </summary>
    public class RenumbItems
    {
        ThisDocument m_doc; //ThisDocument data for VSTA

        /// <summary>
        /// Ctro without parameter is not allowed
        /// </summary>
        private RenumbItems()
        {
        }

        /// <summary>
        /// Ctor with ThisDocument as 
        /// </summary>
        /// <param name="hostApp">ThisDocument handler</param>
        public RenumbItems(ThisDocument hostDoc)
        {
            m_doc = hostDoc;
        }

        /// <summary>
        /// Run this sample
        /// </summary>
        public void Run()
        {
            ELEMENTSET collection = m_doc.Selection.Elements;
           
            // check user selection
            if (collection.Size < 1)
            {
                //MessageBox.Show("Please select an object to Renumber", "Renumber Doors");
                return;
            }

            bool error = true;
            try
            {
                error = true;
                int num = 1;                   //NUMBER START
                // 
                IEnumerator e = collection.GetEnumerator();
                bool MoreValue = e.MoveNext();
                while (MoreValue)
                {
                    Element comp = e.Current as Element;
                    PARAMETER p = comp.get_Parameter(Autodesk.Revit.Parameters.BuiltInParameter.DOOR_NUMBER);
                    string drno = p.AsString();
                    p.Set(drno); 
                    drno++;
                    MoreValue = e.MoveNext();
                }
                error = false;
            }
            catch
            {
                // if revit threw an exception, try to catch it
                foreach (Element c in collection)
                {
                    m_doc.Selection.Elements.Insert(c);
                }
                //MessageBox.Show("Element(s) can't be renumbered.", "Renumber Doors");
                return;
            }
            finally
            {
                // if revit threw an exception, display error and return failed
                if (error)
                {
                    //MessageBox.Show("Renumber failed.");
                }
            }

            return;
        }
    }
}