这实际上取决于所使用的SharePoint版本.

It actually depends on which version of SharePoint is used.

在SharePoint 2013 CSOM中 ListItem .Folder属性获取与文件夹项目关联的文件夹对象.

In SharePoint 2013 CSOM ListItem.Folder property gets a folder object that is associated with a folder item.

对于以下方法可用于检索与ListItem关联的Folder:

The following method could be used for retrieving Folder associated with ListItem:

/// <summary>
/// Get Parent Folder for List Item
/// </summary>
/// <param name="listItem"></param>
/// <returns></returns>
private static Folder GetListItemFolder(ListItem listItem)
{
    var folderUrl = (string)listItem["FileDirRef"];
    var parentFolder = listItem.ParentList.ParentWeb.GetFolderByServerRelativeUrl(folderUrl);
    listItem.Context.Load(parentFolder);
    listItem.Context.ExecuteQuery();
    return parentFolder;
}

示例:

using (var context = new ClientContext(webUrl))
{
      var list = context.Web.Lists.GetByTitle(listTitle);
      var items = list.GetItems(CamlQuery.CreateAllItemsQuery());
      context.Load(items);
      context.ExecuteQuery();


      foreach (var item in items)
      {
         var folder = GetListItemFolder(item); //get Folder
         Console.WriteLine(folder.Name);
      }
}