RevitSdkSamples/snapshot/2011/api/AEC DevCamp/2.4 Dynamic Interaction with Revit Model/Samples/TransactionControl/Command.cs

//
// (C) Copyright 2003-2010 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notify appears in all copies and
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// documentation.
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// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
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// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

namespace TransactionControl
{
    /// <summary>
    /// Implements the Revit add-in interface IExternalCommand
    /// </summary>
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
    [Autodesk.Revit.Attributes.Journaling(Autodesk.Revit.Attributes.JournalingMode.NoCommandData)]
    public class Command : IExternalCommand
    {
        /// <summary>
        /// This command shows a form in which it allows the user to play with transactions
        /// </summary>
        public Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData, ref string message, Autodesk.Revit.DB.ElementSet elements)
        {
            try
            {
                // process data from Revit and show dialog
                using (TransactionForm transactionFrm = new TransactionForm(commandData))
                {
                    if (transactionFrm.ShowDialog() == DialogResult.OK)
                    {
                        return Autodesk.Revit.UI.Result.Succeeded;
                    }
                }
            }
            catch (Exception ex)
            {
                message = ex.Message;
                return Autodesk.Revit.UI.Result.Failed;
            }
            return Autodesk.Revit.UI.Result.Cancelled;
        }
    }
}