revit 二次开发 如何修改元素的表面颜色

1、获取填充图案

 FilteredElementCollector fillPatternElementFilter = new FilteredElementCollector(doc);
                fillPatternElementFilter.OfClass(typeof(FillPatternElement));
                //获取实体填充
                FillPatternElement fillPatternElement = fillPatternElementFilter.First(f => (f as FillPatternElement).GetFillPattern().IsSolidFill) as FillPatternElement;

2、修改图元的填充图案与颜色并应用于当前视图  312116是某个元素的id

OverrideGraphicSettings overrideGraphicSettings = new OverrideGraphicSettings();
                overrideGraphicSettings = doc.ActiveView.GetElementOverrides(new ElementId(312116));
                overrideGraphicSettings.SetProjectionFillPatternId(fillPatternElement.Id);
                overrideGraphicSettings.SetProjectionFillColor(new Autodesk.Revit.DB.Color(255, 255, 0));
                doc.ActiveView.SetElementOverrides(new ElementId(312116), overrideGraphicSettings);