Revit二次开发—修改元素的Material Color（图形颜色）

Color red = new Color(227, 23, 13);
Color orange = new Color(255, 97, 0);
Color green = new Color(50, 205, 50);
ElementId Sen1 = new ElementId(381608);
ElementId Sen2 = new ElementId(381609);
ElementId Sen3 = new ElementId(381610);
ElementId Sen4 = new ElementId(381611);
OverrideGraphicSettings ogsred = new OverrideGraphicSettings();
ogsred.SetProjectionLineColor(red);
doc.ActiveView.SetElementOverrides(Sen1, ogsred);

        //更改材质颜色的方法
        public static void ChangeColor(Document doc, Color color, Element elem)
        {
            ICollection<ElementId> ids = elem.GetMaterialIds(false);
            ElementId matid = null;
            if (ids.Count == 1)
            {
                foreach (ElementId i in ids)
                {
                    matid = i;
                    Material mat = doc.GetElement(i) as Material;
                    mat.Color = color;
                }
            }
            else
            {
                TaskDialog.Show("错误", "您的构件可能有多个材质或者没有材质！");
            }
        }
        #endregion