DevExpress实现TreeList父子节点CheckState状态同步的方法

本文实例展示了devexpress实现treelist父子节点checkstate状态同步的方法，在项目开发中有一定的应用价值，具体实现方法如下：

主要功能代码如下：

/// <summary>
///同步父子节点勾选状态
///说明
///在afterchecknode事件中使用代码
///eg:e.node.syncnodecheckstate(e.node.checkstate);
/// </summary>
/// <param name="node">需要同步的节点</param>
/// <param name="check">节点当前勾选状态</param>
public static void syncnodecheckstate(this treelistnode node, checkstate check) { syncnodecheckstate_child(node, check); syncnodecheckstate_parent(node, check); }

private static void syncnodecheckstate_child(treelistnode node, checkstate check)
{
  if (node != null)
  {
 node.downrecursivenode(n => n.checkstate = check);
  }
}
private static void syncnodecheckstate_parent(treelistnode node, checkstate check)
{
  if (node.parentnode != null)
  {
 bool _cked = false;
 checkstate _ckstate;
 foreach (treelistnode cn in node.parentnode.nodes)
 {
   _ckstate = cn.checkstate;
   if (check != _ckstate)
   {
 _cked = !_cked;
 break;
   }
 }
 node.parentnode.checkstate = _cked ? checkstate.indeterminate : check;
 syncnodecheckstate_parent(node.parentnode, check);
  }
}
/// <summary>
/// 向下递归treelistnode节点
/// </summary>
/// <param name="node">需要向下递归的节点</param>
/// <param name="conditionhanlder">委托</param>
public static void downrecursivenode(this treelistnode node, action<treelistnode> conditionhanlder)
{
  foreach (treelistnode _childnode in node.nodes)
  {
 conditionhanlder(_childnode);
 downrecursivenode(_childnode, conditionhanlder);
  }
}

代码运行效果如下图所示：