RevitSdkSamples/SDK/Samples/NewPathReinforcement/CS/Command.cs

//
// (C) Copyright 2003-2019 by Autodesk, Inc.
//
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// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
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using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using System.Drawing;
using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB.Structure;

namespace Revit.SDK.Samples.NewPathReinforcement.CS
{
    /// <summary>
    /// The entrance of this example, implement the Execute method of 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
    {
        #region IExternalCommand Members Implementation
        ///<summary>
        /// Implement this method as an external command for Revit.
        /// </summary>
        /// <param name="commandData">An object that is passed to the external application 
        /// which contains data related to the command, 
        /// such as the application object and active view.</param>
        /// <param name="message">A message that can be set by the external application 
        /// which will be displayed if a failure or cancellation is returned by 
        /// the external command.</param>
        /// <param name="elements">A set of elements to which the external application 
        /// can add elements that are to be highlighted in case of failure or cancellation.</param>
        /// <returns>Return the status of the external command. 
        /// A result of Succeeded means that the API external method functioned as expected. 
        /// Cancelled can be used to signify that the user cancelled the external operation 
        /// at some point. Failure should be returned if the application is unable to proceed with 
        /// the operation.</returns>
        public Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData,
            ref string message, Autodesk.Revit.DB.ElementSet elements)
        {
            try
            {
                Wall wall = null;
                Floor floor = null;

                ElementSet elems = new ElementSet();
                foreach (ElementId elementId in commandData.Application.ActiveUIDocument.Selection.GetElementIds())
                {
                   elems.Insert(commandData.Application.ActiveUIDocument.Document.GetElement(elementId));
                }
                #region selection handle -- select one Slab (or Structure Wall)
                //if user had some wrong selection, give user an Error message
                string errorMessage = 
                    "Please select one Slab (or Structure Wall) to create PathReinforcement.";
                if (1 != elems.Size)
                {
                    message = errorMessage;
                    return Autodesk.Revit.UI.Result.Cancelled;
                }

                Autodesk.Revit.DB.Element selectElem = null;
                IEnumerator iter = elems.GetEnumerator();
                iter.Reset();
                if (iter.MoveNext())
                {
                    selectElem = (Autodesk.Revit.DB.Element)iter.Current;
                }

                if (selectElem is Wall)
                {
                    wall = selectElem as Wall;
                    if (null == wall.GetAnalyticalModel())
                    {
                        message = errorMessage;
                        return Autodesk.Revit.UI.Result.Cancelled;
                    }
                }
                else if (selectElem is Floor)
                {
                    floor = selectElem as Floor;
                    if (null == floor.GetAnalyticalModel())
                    {
                        message = errorMessage;
                        return Autodesk.Revit.UI.Result.Cancelled;
                    }
                }
                else
                {
                    message = errorMessage;
                    return Autodesk.Revit.UI.Result.Cancelled;
                }
                #endregion
                try
                {
                    if (null != wall)
                    {
                        ProfileWall profileWall = new ProfileWall(wall, commandData);
                        NewPathReinforcementForm newPathReinforcementForm = 
                            new NewPathReinforcementForm(profileWall);
                        newPathReinforcementForm.ShowDialog();
                    }
                    else if (null != floor)
                    {
                        ProfileFloor profileFloor = new ProfileFloor(floor, commandData);
                        NewPathReinforcementForm newPathReinforcementForm = 
                            new NewPathReinforcementForm(profileFloor);
                        newPathReinforcementForm.ShowDialog();
                    }
                }
                catch (Exception ex)
                {
                    message = ex.Message;
                    return Autodesk.Revit.UI.Result.Cancelled;
                }

                return Autodesk.Revit.UI.Result.Succeeded;
            }
            catch (Exception e)
            {
                message = e.Message;
                return Autodesk.Revit.UI.Result.Failed;
            }
        }
        #endregion
    }
}