/// <summary> 判断是否允许拖动到指定节点下[不允许拖动到被选中节点和它的子节点下]
///
/// </summary>
/// <param name="DragedContainer"></param>
/// <returns></returns>
private bool AllowDrag(MindMapNodeContainer DragedContainer)
{
#region 获取所有选中节点和他的子节点
List <MindMapNodeContainer> NodeContainerList = GetSelectedNode(); //获取所有选中节点
List <MindMapNodeContainer> SelectedAndChidrenList = new List <MindMapNodeContainer>();
SelectedAndChidrenList.AddRange(NodeContainerList); //获取选中节点
NodeContainerList.ForEach(T1 => SelectedAndChidrenList.AddRange(T1.GetChidrenNode(true))); //获取选中节点的子节点
SelectedAndChidrenList = SelectedAndChidrenList.Distinct().ToList(); //去重，两个已选中节点可能是父子关系
#endregion 获取所有选中节点和他的子节点
if (SelectedAndChidrenList.Contains(DragedContainer))//不允许拖动到被选中节点和它的子节点下
{
return(false);
}
return(true);
}