/// <summary>/// 設置FocusedNode的背景色/// 說明：/// 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">起始背景顏色</param>/// <param name="backColor2">結束背景顏色</param>/// <param name="foreBrush">字體顏色</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);}