Sitecore 找不到配置节点 dataAdapterManager

使用以下代码行获取 Sitecore 中访问量最大的页面时出现错误">找不到配置节点：dataAdapterManager"：-

string query =
        string.Format(
            "SELECT TOP {0} ItemId, count(*) as cnt FROM Pages WHERE DateTime > DATEADD(DAY, -{1}, GETDATE()) GROUP BY ItemId ORDER BY cnt DESC",
            10, 90);
    IEnumerable<Guid> itemIDs = DataAdapterManager.Sql.ReadMany(query,
        reader => new
        {
            ItemId =DataAdapterManager.Sql.GetGuid(0, reader),
        },
        new object[0]).Select(a => a.ItemId);
    IEnumerable<Item> popularPages= itemIDs.Select(id => Sitecore.Context.Database.GetItem(new Sitecore.Data.ID(id))).Where(item => item != null).ToList();
    foreach(var pp in popularPages)
    {

        Response.Write(pp.Name);
    }