过滤器的使用

 public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            Document revitDoc = commandData.Application.ActiveUIDocument.Document;  //取得文档
            UIApplication uiApp = commandData.Application;
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application revitApp = commandData.Application.Application;             //取得应用程序
            FilteredElementCollector elementcollects = new FilteredElementCollector(revitDoc );//创建一个收集器
             //创建一个过滤器
 **ElementCategoryFilter elementCategoryFilter = new ElementCategoryFilter(BuiltInCategory.OST_Walls);            
 elementcollects = elementcollects.WherePasses(elementCategoryFilter);**
	            MessageBox.Show(elementcollects.Count().ToString());
	            foreach (Element  item in elementcollects)
	            {
	                MessageBox.Show(item.Name);
	            }

  	 return Result.Succeeded;
	   }

以上是筛选出了 组类型和族实例 注意 墙体没有族实例

 public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            Document revitDoc = commandData.Application.ActiveUIDocument.Document;  //取得文档
            UIApplication uiApp = commandData.Application;
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application revitApp = commandData.Application.Application;             //取得应用程序
            **FilteredElementCollector elementcollects = new FilteredElementCollector(revitDoc );//创建一个收集器
                                                                                               //创建一个过滤器
            ElementClassFilter elementClassFilter = new ElementClassFilter(typeof(Wall));**

            elementcollects = elementcollects.WherePasses(elementClassFilter);
                                                                                  /*.OfClass(typeof(FamilyInstance));*/
            MessageBox.Show(elementcollects.Count().ToString());
            foreach (Element  item in elementcollects)
            {
                MessageBox.Show(item.Name);
            }

            return Result.Succeeded;
        }

上面只是筛选出了墙的“实例”

namespace ClassLibrary1
{
    [Transaction(TransactionMode.Manual)]
    public class Command : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            Document revitDoc = commandData.Application.ActiveUIDocument.Document;  //取得文档
            UIApplication uiApp = commandData.Application;
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application revitApp = commandData.Application.Application;             //取得应用程序
            FilteredElementCollector elementcollects = new FilteredElementCollector(revitDoc );//创建一个收集器
                    //创建一个过滤器
            **ElementCategoryFilter elementCategoryFilter = new ElementCategoryFilter(BuiltInCategory.OST_StructuralFraming);
            elementcollects = elementcollects.WherePasses(elementCategoryFilter);**/*.OfClass(typeof(FamilyInstance));*/
            MessageBox.Show(elementcollects.Count().ToString());
            foreach (Element  item in elementcollects)
            {
                MessageBox.Show(item.Name);
            }
            return Result.Succeeded;
        }
    }
}

以上筛选出了族类型 和族实例

namespace ClassLibrary1
{
    [Transaction(TransactionMode.Manual)]
    public class Command : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            Document revitDoc = commandData.Application.ActiveUIDocument.Document;  //取得文档
            UIApplication uiApp = commandData.Application;
            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application revitApp = commandData.Application.Application;             //取得应用程序
            FilteredElementCollector elementcollects = new FilteredElementCollector(revitDoc );//创建一个收集器
                                                                                       //创建一个过滤器
            **ElementCategoryFilter elementCategoryFilter = new ElementCategoryFilter(BuiltInCategory.OST_StructuralFraming);
            elementcollects = elementcollects.WherePasses(elementCategoryFilter).OfClass(typeof(FamilyInstance));**
            MessageBox.Show(elementcollects.Count().ToString());
            foreach (Element  item in elementcollects)
            {
                MessageBox.Show(item.Name);
            }

            return Result.Succeeded;
        }
    }

以上就是筛选出了 所有的梁的族实例