[DevExpress]利用TreeListOperation获取勾选的节点集合

public class TreeListCheckedNodesOperation : TreeListOperation
{
private IDictionary<TreeListNode, IList<TreeListNode>> _checkedNodes = null;
public TreeListCheckedNodesOperation()
{
_checkedNodes = new Dictionary<TreeListNode, IList<TreeListNode>>();
}
public override void Execute(TreeListNode node)
{
if (node.Checked)
SaveNodeRelationship(node);
}
private void SaveNodeRelationship(TreeListNode _currentNode)
{
if (_currentNode == null) return;
NodeType _nodeType = (NodeType)_currentNode.Tag;
lock (((ICollection)_checkedNodes).SyncRoot)
{
if (_nodeType == NodeType.Ch)//若为子节点
ProcessChildNode(_currentNode);
if (_nodeType == NodeType.Cab)//若为父节点
ProcessParentNode(_currentNode);
}
}
private void ProcessParentNode(TreeListNode _currentNode)
{
if (!_checkedNodes.ContainsKey(_currentNode))
_checkedNodes.Add(_currentNode, new List<TreeListNode>());
}
private void ProcessChildNode(TreeListNode _currentNode)
{
TreeListNode _parentNode = _currentNode.ParentNode;
if (_parentNode != null)
{
IList<TreeListNode> _childNodes = null;
if (_checkedNodes.ContainsKey(_parentNode))
{
_childNodes = _checkedNodes[_parentNode];
if (_childNodes == null)
_childNodes = new List<TreeListNode>();
}
else
{
_childNodes = new List<TreeListNode>();
}
_childNodes.Add(_currentNode);
_checkedNodes[_parentNode] = _childNodes;
}
}
public IDictionary<TreeListNode, IList<TreeListNode>> CheckedNodes
{
get
{
return _checkedNodes;
}
}
}

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