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我是新来的sharepoint，我试图从sharepoint检索的项目列表中建立父母及其各自子女的树状视图列表。在我的代码中，我使用“ID”字段值来标识项目，并使用“parentleafname”查找值来尝试确定此项目是否具有父项。看起来，“parentleafname”中的“ID”和lookup值是相同的。我如何从返回的列表中的项目获取父ID？Sharepoint 2013 GetItems父母身份证
private ListItemCollection GetList(string listName)
{
var web = _sharePointContext.Web;
Microsoft.SharePoint.Client.List list = web.Lists.GetByTitle(listName);
var query = new CamlQuery();
query.ViewXml = "<View Scope=\"RecursiveAll\"> " +
"<Query>" +
"<OrderBy>" +
"< FieldRef Name = 'ID' />" +
"</ OrderBy >" +
"</ Query >" +
"</View>";
query.FolderServerRelativeUrl = "/lists/" + listName;
ListItemCollection folders = list.GetItems(query);
_sharePointContext.Load(list);
_sharePointContext.Load(list.Fields);
_sharePointContext.Load(folders, fs => fs.Include(
fi => fi["Title"],
fi => fi["DisplayName"],
fi => fi["FileLeafRef"],
fi => fi["ParentLeafName"],
fi => fi["ID"],
fi => fi["ContentTypeId"]
));
_sharePointContext.ExecuteQuery();
return folders;
}