我在改变构件的颜色时发现当我修改一个构件时，同一种材料的构件的颜色都被改变了，于是查找问题，答案如下：

    （1）通过材料属性更改构件颜色

    通过材料属性更改构件颜色主要关注点是材料的”材质“，而不是构件，所以不同构件只要材质相同，在修改它颜色时，文档中所有相同材质构件都会被修改。通过材质修改颜色是修改下图中着色中的颜色，修改后的颜色属性值可以通过Lookup查到。

    代码：

      Element ele = doc.GetElement(sel.PickObject(ObjectType.Element, "选择元素"));          
      Transaction ts = new Transaction(doc, "12");
      ts.Start();
      Color color = new Color(250,200,100);
      Material material = doc.GetElement(ele.GetMaterialIds(false).First()) as Material;
     material.Color = color;
     ts.Commit();

    （2）直接改变构件的颜色

    直接改变构件的颜色是通过OverrideGraphicSettings类来设置覆盖视图中元素的显示。不会修改构件材质，其修改的颜色通过Lookup查找不到，可以通过OverrideGraphicSettings.ProjectionFillColor属性来获取修改的颜色值。

    代码：

      //1.修改构件颜色
     Element ele = doc.GetElement(sel.PickObject(ObjectType.Element, "选择元素"));
 FilteredElementCollector fillPatternElementFilter = new FilteredElementCollector(doc);
     fillPatternElementFilter.OfClass(typeof(FillPatternElement));
     //获取实体填充
    Element ele = doc.GetElement(sel.PickObject(ObjectType.Element, "选择元素"));          
    Transaction ts = new Transaction(doc, "12");
    ts.Start();       
    FillPatternElement fillPatternElement = fillPatternElementFilter.First(f =>
            (f as FillPatternElement).GetFillPattern().IsSolidFill) as FillPatternElement;
    OverrideGraphicSettings overrideGraphicSettings = new    OverrideGraphicSettings();
     overrideGraphicSettings = doc.ActiveView.GetElementOverrides(ele.Id);            overrideGraphicSettings.SetSurfaceForegroundPatternId(fillPatternElement.Id);      overrideGraphicSettings.SetSurfaceForegroundPatternColor(new Autodesk.Revit.DB.Color(250, 50, 10));  uidoc.ActiveView.SetElementOverrides(ele.Id, overrideGraphicSettings);
           string red = overrideGraphicSettings.ProjectionFillColor.Red.ToString();
            string blue = overrideGraphicSettings.ProjectionFillColor.Blue.ToString();
            string green = overrideGraphicSettings.ProjectionFillColor.Green.ToString();
  TaskDialog.Show("1", red + "," + blue + "," + green);
   ts.Commit();

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