public void AfterExpand(UltraTreeNode node, ImageList.ImageCollection images)
{
if (!ChildrenDic.ContainsKey(node.Key) || ChildrenDic[node.Key].IsNullOrEmpty())
{
return;
}
node.Nodes.Clear();
BuildSubTree(node, ChildrenDic[node.Key], images);
}
/// <summary>
/// 更新字典中缓存内容
/// </summary>
/// <param name="key"></param>
/// <param name="getChildren"></param>
protected void UpdateDic(string key, Func <List <T> > getChildren)
{
var model = ParentsToBeUpdated?.Find(key);
if (model != null)
{
ParentsToBeUpdated.Remove(model);
if (ChildrenDic.ContainsKey(key))
{
ChildrenDic[key] = getChildren();
}
}
if (!ChildrenDic.ContainsKey(key))
{
ChildrenDic.Add(key, getChildren());
}
}
/// <summary>
/// 获取子类集合
/// </summary>
/// <param name="selectedNodes">选中的树节点集合</param>
/// <param name="getChildren"></param>
public List <T> GetChildren(SelectedNodesCollection selectedNodes, Func <List <T> > getChildren = null)
{
var children = new List <T>();
foreach (var node in selectedNodes)
{
if (ChildrenDic.ContainsKey(node.Key) && ChildrenDic[node.Key].IsNotNullorEmpty())
{
children.AddRange(ChildrenDic[node.Key]);
}
else if (getChildren != null && getChildren().IsNotNullorEmpty())
{
ChildrenDic.Add(node.Key, getChildren());
}
}
return(children);
}