public IActionResult Index(string currentPath, string startPath = "", int deep = int.MaxValue)
{
var startNode = string.IsNullOrWhiteSpace(startPath) ? rootSiteMapNode : rootSiteMapNode.Find(startPath);
if (startNode == null)
{
throw new Exception($"未找到到路径为{startPath}的菜单");
}
var sitemap = startNode.Copy(currentPath, this.User, deep);
return(Ok(sitemap.ChildNodes));
}