Revit二次开发之“显示或隐藏视图中未选中的元素”

方法是先隐藏全部元素，再显示选中的。 
转自：http://revit.5d6d.com/thread-1094-1-1.html

//显示或隐藏视图中未选中的元素
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
//[Journaling(JournalingMode.NoCommandData)]
public class HideUnHideUnSelectInView : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
    {
        UIDocument uiDoc = commandData.Application.ActiveUIDocument;
        Selection selection = uiDoc.Selection;
        Autodesk.Revit.DB.View view = uiDoc.Document.ActiveView;

        Transaction ts = new Transaction(uiDoc.Document, "HideUnHide");
        ts.Start();

        //先把所有可隐藏的元素隐藏，再把选中的元素显示
        ElementSet elementSet = new ElementSet();
        //遍历风管
        FilteredElementCollector collectorDuct = new FilteredElementCollector(uiDoc.Document);
        collectorDuct.OfClass(typeof(Duct)).OfCategory(BuiltInCategory.OST_DuctCurves);//风管，直接用类名
        foreach (Element el in collectorDuct)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历墙
        FilteredElementCollector collectorWall = new FilteredElementCollector(uiDoc.Document);
        collectorWall.OfClass(typeof(Wall)).OfCategory(BuiltInCategory.OST_Walls);//墙，直接用类名
        foreach (Element el in collectorWall)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历窗
        FilteredElementCollector collectorWindow = new FilteredElementCollector(uiDoc.Document);
        collectorWindow.OfClass(typeof(FamilyInstance)).OfCategory(BuiltInCategory.OST_Windows);//窗，类型是FamilyInstance
        foreach (Element el in collectorWindow)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历门
        FilteredElementCollector collectorDoor = new FilteredElementCollector(uiDoc.Document);
        collectorDoor.OfClass(typeof(FamilyInstance)).OfCategory(BuiltInCategory.OST_Doors);//门，类型是FamilyInstance
        foreach (Element el in collectorDoor)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        view.Hide(elementSet);

        //判断在此视图下是否可以隐藏
        foreach (Element el in selection.Elements)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Clear();
                elementSet.Insert(el);
                view.Unhide(elementSet);
            }
        }

        ts.Commit();
        return Result.Succeeded;
    }
}

//显示全部元素
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
//[Journaling(JournalingMode.NoCommandData)]
public class ShowAllInView : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
    {
        UIDocument uiDoc = commandData.Application.ActiveUIDocument;
        Selection selection = uiDoc.Selection;
        Autodesk.Revit.DB.View view = uiDoc.Document.ActiveView;

        Transaction ts = new Transaction(uiDoc.Document, "HideUnHide");
        ts.Start();

        //先把所有可隐藏的元素隐藏，再把选中的元素显示
        ElementSet elementSet = new ElementSet();
        //遍历风管
        FilteredElementCollector collectorDuct = new FilteredElementCollector(uiDoc.Document);
        collectorDuct.OfClass(typeof(Duct)).OfCategory(BuiltInCategory.OST_DuctCurves);//风管，直接用类名
        foreach (Element el in collectorDuct)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历墙
        FilteredElementCollector collectorWall = new FilteredElementCollector(uiDoc.Document);
        collectorWall.OfClass(typeof(Wall)).OfCategory(BuiltInCategory.OST_Walls);//墙，直接用类名
        foreach (Element el in collectorWall)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历窗
        FilteredElementCollector collectorWindow = new FilteredElementCollector(uiDoc.Document);
        collectorWindow.OfClass(typeof(FamilyInstance)).OfCategory(BuiltInCategory.OST_Windows);//窗，类型是FamilyInstance
        foreach (Element el in collectorWindow)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        //遍历门
        FilteredElementCollector collectorDoor = new FilteredElementCollector(uiDoc.Document);
        collectorDoor.OfClass(typeof(FamilyInstance)).OfCategory(BuiltInCategory.OST_Doors);//门，类型是FamilyInstance
        foreach (Element el in collectorDoor)
        {
            if (el.CanBeHidden(view) == true)
            {
                elementSet.Insert(el);
            }
        }
        view.Unhide(elementSet);

        ts.Commit();
        return Result.Succeeded;
    }
}