Revit API获得材质参数值

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 System.Xml;



namespace RevitCodes

{

    [TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]

    public class cmdMaterial : 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.");

            ts.Start();



            //选中一个窗户

            Element element = doc.GetElement(sel.PickObject(ObjectType.Element, "请选择个对象"));

            FamilyInstance fi = element as FamilyInstance;



            GetMaterial(doc, fi);



            ts.Commit();



            return Result.Succeeded;

        }

        public void GetMaterial(Document document, FamilyInstance familyInstance)

        {

            Materials materials = document.Settings.Materials;

            string str = "";

            foreach (Parameter pa in familyInstance.Symbol.Parameters)//通过族符号

            {

                Definition definition = pa.Definition;//参数的基类

                //过滤参数

                if (definition.ParameterGroup == BuiltInParameterGroup.PG_MATERIALS &&

                        definition.ParameterType == ParameterType.Material)

                {

                    Material ma = materials.get_Item(pa.AsElementId());//得到材料参数值的方法

                    str += definition.Name + ":" + ma.Name + "\n";

                }

            }

            TaskDialog.Show("材质信息", str);

        }

    }



}