Revit二次开发之“遍历材质判断材质类别的新方法”BuiltInParameter.PHY_MATERIAL_PARAM_CLASS

老版本API的方法：

if (material is MaterialSteel)
新版本API的方法：

Parameter curPara = material.get_Parameter(BuiltInParameter.PHY_MATERIAL_PARAM_CLASS);

if (curPara.AsInteger()==(int)StructuralMaterialType.Steel)
全部代码如下：

[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class cmdMaterial : IExternalCommand
{
    public Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet elements)
    {
        UIDocument uiDoc = cmdData.Application.ActiveUIDocument;
        FilteredElementCollector collector = new FilteredElementCollector(uiDoc.Document);
        collector.OfClass(typeof(Material));
        FilteredElementIterator materialItr = collector.GetElementIterator();
        materialItr.Reset();
        int i = 0;
        #region 新方法
        while (materialItr.MoveNext())
        {
            Material material = materialItr.Current as Material;
            Parameter curPara = material.get_Parameter(BuiltInParameter.PHY_MATERIAL_PARAM_CLASS);
            switch (curPara.AsInteger())
            {
                case (int)StructuralMaterialType.Steel:
                    TaskDialog.Show("新方法", material.Name);
                    break;
            }
        }
        #endregion
        #region 过时的方法
        materialItr.Reset();
        while (materialItr.MoveNext())
        {
            i = i + 1;
            Material material = materialItr.Current as Material;

            if (material is MaterialSteel)//steel金属
            {
                MaterialSteel steelMa = material as MaterialSteel;
                TaskDialog.Show("steel", steelMa.Name);
            }
        }
        #endregion
        TaskDialog.Show("count", i + "");

        return Result.Succeeded;
    }
}

from:http://revit.5d6d.com/thread-1253-1-1.html