Revit API计算风管水管的总长度

通过Line的Length属性

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Text;

using  WinForm  =  System.Windows.Forms;

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

using  Autodesk.Revit.DB.Mechanical;
using  Autodesk.Revit.UI.Selection;
using  Autodesk.Revit.ApplicationServices;

using  Autodesk.Revit.DB.Structure;
using  Autodesk.Revit.DB.ExtensibleStorage;
using  Autodesk.Revit.DB.Plumbing;

using  System.Xml;

namespace  RevitCodes
{
    [TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]
     public   class  cmdLength : IExternalCommand
    {
         public  Result Execute(ExternalCommandData commandData,  ref   string  messages, ElementSet elements)
        {
            UIApplication uiApp  =  commandData.Application;
            Document doc  =  uiApp.ActiveUIDocument.Document;
            Selection sel  =  uiApp.ActiveUIDocument.Selection;

            Transaction ts  =   new  Transaction(doc,  " http://revit.5d6d.com " );
            ts.Start();
             // 遍历全部风管
            FilteredElementCollector collector  =   new  FilteredElementCollector(doc);
            collector.OfClass( typeof (Duct)).OfCategory(BuiltInCategory.OST_DuctCurves);
             double  lengthDuct  =   0 ;
             foreach  (Element el  in  collector)
            {
                Duct duct  =  el  as  Duct;
                lengthDuct  +=  getDuctLength(uiApp, duct);
            }
             // 遍历全部水管
            FilteredElementCollector collectorPipe  =   new  FilteredElementCollector(doc);
            collectorPipe.OfClass( typeof (Pipe)).OfCategory(BuiltInCategory.OST_PipeCurves);
             double  lengthPipe  =   0 ;
             foreach  (Element el  in  collectorPipe)
            {
                Pipe pipe  =  el  as  Pipe;
                lengthPipe  +=  getPipeLength(uiApp, pipe);
            }
            TaskDialog.Show( " 工程量统计 " ,
                 " 风管： "   +  collector.Count()  +   " 个\n "   +
                " 总长度： "   +  lengthDuct  +   " 毫米\n "   +
                 " 水管： "   +  collectorPipe.Count()  +   " 个\n "   +
                " 总长度： "   +  lengthPipe  +   " 毫米\n " );

            

            ts.Commit();

             return  Result.Succeeded;
        }
         // 取得风管长度
         private   double  getDuctLength(UIApplication uiApp, Duct duct)
        {
            LocationCurve ductLocation  =  duct.Location  as  LocationCurve;
            XYZ pt1  =  ductLocation.Curve.get_EndPoint( 0 );
            XYZ pt2  =  ductLocation.Curve.get_EndPoint( 1 );
            Line newDuctLine  =  uiApp.Application.Create.NewLineBound(pt1, pt2);
             return  feetToMm(newDuctLine.Length);
        }
         // 取得水管长度
         private   double  getPipeLength(UIApplication uiApp, Pipe pipe)
        {
            LocationCurve pipeLocation  =  pipe.Location  as  LocationCurve;
            XYZ pt1  =  pipeLocation.Curve.get_EndPoint( 0 );
            XYZ pt2  =  pipeLocation.Curve.get_EndPoint( 1 );
            Line newPipeLine  =  uiApp.Application.Create.NewLineBound(pt1, pt2);
             return  feetToMm(newPipeLine.Length);
        }
         // Revit内部单位feet转化为mm即毫米
         public   double  mmToFeet( double  val) {  return  val  /   304.8 ; }
         public   double  feetToMm( double  val) {  return  val  *   304.8 ; }
    }

}

from: http://revit.5d6d.com/thread-1303-1-1.html