DevExpress实现自定义TreeListNode的Tooltip的方法

/// <summary>/// 为节点提供Tooltip/// 说明：/// 1.设置tree.ToolTipController属性/// 2.ToolTipController的GetActiveObjectInfo事件中使用/// 3.举例/// tlLHData.CustomNodeTooltip(e, node =>///{///  string _cabId = node.GetKeyID();///  CCabInfo _cabinfo = LHDBHelper.GetCabInfo(_cabId);///  if (_cabinfo != null)///  {///    return string.Format("核对时间:{0}/r/n在线情况:{1}/r/n最后一次活跃时间:{2}/r/n",///               _cabinfo.ChkDataTime,///               _cabinfo.CtuOnlineStatus == 1 ? "在线" : "未上线",///               _cabinfo.LastAliveTime);///  }///  return string.Empty;///});/// </summary>/// <param name="tree">TreeList</param>/// <param name="e">ToolTipControllerGetActiveObjectInfoEventArgs</param>/// <param name="builderNodeTooltipHandler">委托</param>public static void CustomNodeTooltip(this TreeList tree, ToolTipControllerGetActiveObjectInfoEventArgs e, Func<TreeListNode, string> builderNodeTooltipHandler){  if (e.SelectedControl is DevExpress.XtraTreeList.TreeList)  { TreeList _tree = (TreeList)e.SelectedControl; TreeListHitInfo _hit = _tree.CalcHitInfo(e.ControlMousePosition); if (_hit.HitInfoType == HitInfoType.Cell) {   TreeListViewInfo _viewInfo = _tree.ViewInfo;   RowInfo _rowInfo = _viewInfo.GetRowInfoByPoint(e.ControlMousePosition);   CellInfo _cellInfo = _rowInfo.Cells[_hit.Column.VisibleIndex] as CellInfo;   EditHitInfo _editHitInfo = _cellInfo.EditorViewInfo.CalcHitInfo(e.ControlMousePosition);   if (_editHitInfo.HitTest == EditHitTest.MaskBox)   { string _toolTip = builderNodeTooltipHandler(_hit.Node); if (!string.IsNullOrEmpty(_toolTip))   e.Info = new ToolTipControlInfo(_cellInfo, _toolTip);   } }  }}