OData $扩展URL限制？

Question

当您有很多（本例中为20个）要展开的导航属性时，如何通过服务参考扩展实体的导航属性？我正在执行以下代码：

var result = MyEntities.Sample.Expand("Collector,Container,Coordinates...") 

这导致以下URI：

http://192.168.0.196/Service.svc/Sample?$expand=Collector,Container,Coordinates,DispositionRequest,Employee,EstimatedSampleVolume,Facility,PreparationSize,Priority,Product,SourceLocation,SampleClassification,Unit,Vendor,Unit,WorkOrder,SampleType,Subject,Site,State

我得到的错误是：

$expand does not support '19' properties expanded simultaneously on the same segment.

Answer 1

OData协议目前不支持同时扩展的属性不超过13个。

https://github.com/OData/odata.net/blob/ODATAV3/WCFDataService/Service/System/Data/Services/WebUtil.cs#L986-L990