通常$filter和$expand可以组合使用，我们在应用程序中使用它.因此，请参阅 Layla的评论.另外，您应该告诉我们实际的错误是什么.

In general $filter and $expand can be combined, we use it in our application. Therefore please see Layla's Comment. In addition, you should tell us what the actual error is.

如果MatnrGetdetailCollection确实是一个实体集，则相应的实体必须具有名称为MatnrClassGetdetail的导航属性，否则$expand将不起作用.

If MatnrGetdetailCollection is indeed an entity set, then the corresponding entity must have a navigation property of the name MatnrClassGetdetail, otherwise $expand won't work.