DevExpress设置FocusedNode背景色的方法

/// <summary>
/// 设置focusednode的背景色
/// 说明：
/// 在customdrawnodecell事件中使用
/// 示例：
/// _curtree.setfocusednodebackcolor(color.green, color.peachpuff, color.black, e);
/// </summary>
/// <param name="tree">treelist</param>
/// <param name="backcolor1">起始背景颜色</param>
/// <param name="backcolor2">结束背景颜色</param>
/// <param name="forebrush">字体颜色</param>
/// <param name="e">customdrawnodecelleventargs</param>
public static void setfocusednodebackcolor(this treelist tree, color backcolor1, color backcolor2, color forebrush, customdrawnodecelleventargs e)
{
  if (e.node == tree.focusednode)
  {
 brush _backbrush, _forebrush;
 _backbrush = new lineargradientbrush(e.bounds, backcolor1, backcolor2, lineargradientmode.horizontal);
 _forebrush = new solidbrush(forebrush);
 e.graphics.fillrectangle(_backbrush, e.bounds);
 e.graphics.drawstring(e.celltext, e.appearance.font, _forebrush, e.bounds, e.appearance.getstringformat());
 e.handled = true;
  }
}

private void tllhdata_customdrawnodecell(object sender, customdrawnodecelleventargs e)
{
  treelist _curtree = sender as treelist;
  _curtree.setfocusednodebackcolor(color.orange, color.peachpuff, color.black, e);
}