# IEventHubDataAdapter.GetPartitionKey(StreamId)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.ieventhubdataadapter/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.streaming.eventhubs/orleans.streaming.eventhubs.ieventhubdataadapter/methods/)

```csharp
public abstract string GetPartitionKey(StreamId streamId)
```

### Parameters

- `streamId` (`StreamId`)