我要评论本文实例展示了devexpress实现自定义treelistnode的tooltip的方法，具体方法如下所示：
主要功能代码如下：
/// <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);
}
}
}
}
代码运行效果如下：
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