/// <summary>
/// 10万级别UI线程直接加载方式
//目前是100万个1.5秒左右
/// </summary>
/// <param name="orgs"></param>
private void LoadOrgsSync(List <NodeInfoFromDB> orgs)
{
var dd = TreeUtil.ImageRescource;
List <TreeNodeModel> roots = new List <TreeNodeModel>();
var orgDicts = orgs.ToDictionary(c => c.Index, c => c);
foreach (var org in orgs)
{
//获取org对应节点
TreeNodeModel orgNode = GetOrCreateCacheOrgsNode(org);
//获取父节点
//1、判断当前节点是否为根节点（根节点的父节点组织信息是不存在的
if (!orgDicts.ContainsKey(org.ParentIndex)) //org为根节点
{
roots.Add(orgNode); //记录根节点。
//可以在此处直接添加到树控件中
continue;
}
//2、创建父节点
TreeNodeModel orgParentNode = GetOrCreateCacheOrgsNode(orgDicts[org.ParentIndex]);
//3、添加到父节点
orgParentNode.Nodes.Add(orgNode);
}
//添加到树控件种
_tv.ItemsSource = new ObservableCollection <TreeNodeModel>(roots);
}
/// <summary>
/// 批量加载组织节点（一次性添加所有子节点) ，已经按父节点分好组了！！！) 复杂度 O(n)
/// </summary>
/// <param name="orgs"></param>
private void LoadOrgsWayBatchAsync(List <NodeInfoFromDB> orgs)
{
//获取根节点列表
List <TreeNodeModel> roots = new List <TreeNodeModel>();
var tempDicts = orgs.GroupBy(g => g.ParentIndex).ToDictionary(g => g.Key, g => g.ToList());//
var orgDicts = orgs.ToDictionary(g => g.Index, g => g);
foreach (var item in tempDicts.Keys)
{
if (!orgDicts.ContainsKey(item))
{
foreach (var rt in tempDicts[item])
{
roots.Add(GetOrCreateCacheOrgsNode(rt));
}
}
}
//添加到根
_tv.ItemsSource = new ObservableCollection <TreeNodeModel>(roots);
Task.Run(() =>
{
//tempDicts的Values中的所有集合对应了所有的组织信息
foreach (var item in tempDicts) //Keys中的根节点的父节点是不存在的。
{
if (!orgDicts.ContainsKey(item.Key)) //Key为根的父节点,直接pass
{
continue;
}
//Key对应的组织节点
TreeNodeModel orgParentNode = GetOrCreateCacheOrgsNode(orgDicts[item.Key]);
var tempOrgs = new List <TreeNodeModel>();
foreach (var info in item.Value)//Value中的子节点，此处可以改成批量添加***************
{
TreeNodeModel node = GetOrCreateCacheOrgsNode(info);
tempOrgs.Add(node);
node.ParentNode = orgParentNode;
}
_tv.Dispatcher.Invoke(() =>
{
tempOrgs.ForEach(c => orgParentNode.Nodes.Add(c));
});
}
});
}