Changing the color of annotation

By Joe Ye

Issue

How can I change the color of an annotation symbol  through Revit API?

Solution

View.ProjColorOverrideByElement can be used to change a set of individual elements' color in the caller view.Here is the code fragment to change selected annotation in active view.

    UIApplication uiApp = commandData.Application;

    Application app = uiApp.Application;

    Document doc = uiApp.ActiveUIDocument.Document;

 

    Color color = app.Create.NewColor();

    color.Blue = (byte)150;

    color.Red = (byte)200;

    color.Green = (byte)200;

 

    Selection sel = uiApp.ActiveUIDocument.Selection;

    Reference ref1 = sel.PickObject(ObjectType.Element,

      "Pick an Annotation");

    Element elem = ref1.Element;

 

    List<ElementId> ids = new List<ElementId>();

    ids.Add(elem.Id);

 

    Transaction trans = new Transaction(doc);

    trans.Start("ChangeColor");

    doc.ActiveView.set_ProjColorOverrideByElement(ids, color);

    trans.Commit();