grid 行色彩交替显示

grid 行颜色交替显示
大家好：
   grid控件如何能实现行颜色交替显示呀？比如奇数行背景是白色、偶数行背景色是黄色。
[解决办法]

void __fastcall TForm1::DBGridEh1DrawDataCell(TObject *Sender,const TRect &Rect, TField *Field, Gridseh::TGridDrawState State)
{
  if(Field->DataSet->RecNo%2 == 0 )
    DBGridEh1->Canvas->Brush->Color = clCream;
  else 
    DBGridEh1->Canvas->Brush->Color = clWindow;  
  DBGridEh1->DefaultDrawDataCell(Rect, Field, State); 
}

void __fastcall TForm1::DBGridEh1DrawDataCell(TObject *Sender,const TRect &Rect, TField *Field, Gridseh::TGridDrawState State)
{
  //选中单元不同颜色
  if(State.Contains(gdSelected) 
[解决办法]
 State.Contains(gdFocused)) 
    DBGridEh1->Canvas->Font->Color = clBlue;
  else
    DBGridEh1->Canvas->Font->Color = clBlack;
  DBGridEh1->DefaultDrawDataCell(Rect, Field, State); 
}