DevExpress实现禁用TreeListNode CheckBox的方法

/// <summary>
/// 禁用CheckBox
/// 说明
/// 在CustomDrawNodeCheckBox事件中使用
/// </summary>
/// <param name="tree">TreeList</param>
/// <param name="conditionHanlder">委托</param>
/// <param name="e">CustomDrawNodeCheckBoxEventArgs</param>
public static void DisabledCheckBox(this TreeListNode tree, Predicate<TreeListNode> conditionHanlder, CustomDrawNodeCheckBoxEventArgs e)
{
  if (conditionHanlder(e.Node))
  {
 e.ObjectArgs.State = ObjectState.Disabled;
  }
}
/// <summary>
/// 禁止操作节点CheckBox
/// 说明
/// 在BeforeCheckNode事件中使用
/// </summary>
/// <param name="tree">TreeListNode</param>
/// <param name="conditionHanlder">委托</param>
/// <param name="e">CheckNodeEventArgs</param>
public static void DisabledSetCheckBox(this TreeListNode tree, Predicate<TreeListNode> conditionHanlder, CheckNodeEventArgs e)
{
  if (conditionHanlder(e.Node))
  {
 e.CanCheck = false;
  }
}

/// <summary>
/// CustomDrawNodeCheckBox事件
/// </summary>
void LHTree_CustomDrawNodeCheckBox(object sender, CustomDrawNodeCheckBoxEventArgs e)
{
  e.Node.DisabledCheckBox(DisableNodeCheckBoxRule, e);
}
/// <summary>
/// BeforeCheckNode事件
/// </summary>
void LHTree_BeforeCheckNode(object sender, CheckNodeEventArgs e)
{
  e.Node.DisabledSetCheckBox(DisableNodeCheckBoxRule, e);
}
/// <summary>
/// Disable TreeListNode规则
/// </summary>
/// <param name="node"></param>
/// <returns></returns>
private bool DisableNodeCheckBoxRule(TreeListNode node)
{
  bool _disable = false;
  if (OpLampCfgList.Count > 0)
  {
 string _cabId = OpLampCfgList[0].CabID;
 NodeType _curType = node.GetNodeType();
 if (_curType == NodeType.Lamp)//当节点是灯类型且父节点KEYID等于_cabId时候，屏蔽Checkbox
 {
   _disable = node.ParentNode.ParentNode.GetKeyID().Equals(_cabId);
 }
 if (_curType == NodeType.Pole)//当节点是杆类型且父节点KEYID等于_cabId时候，屏蔽Checkbox
 {
   _disable = node.ParentNode.GetKeyID().Equals(_cabId);
 }
 if (_curType == NodeType.Cab && node.GetKeyID().Equals(_cabId))//当节点是箱类型KEYID等于_cabId时候，屏蔽Checkbox
 {
   _disable = true;
 }
 if (_curType == NodeType.Area || _curType == NodeType.CabsGroupRoot)//当节点类型等于地域或者根节点时候，屏蔽Checkbox
 {
   _disable = true;
 }
  }
  return _disable;
}