DataflowBlock.Receive(Of TOutput) Method (ISourceBlock(Of TOutput), TimeSpan, CancellationToken)
Synchronously receives a value from a specified source, providing a token to cancel the operation and observing an optional time-out interval.
Assembly: System.Threading.Tasks.Dataflow (in System.Threading.Tasks.Dataflow.dll)
'Declaration <ExtensionAttribute> _ Public Shared Function Receive(Of TOutput) ( _ source As ISourceBlock(Of TOutput), _ timeout As TimeSpan, _ cancellationToken As CancellationToken _ ) As TOutput
The type of data contained in the source.
- Type: System.Threading.Tasks.Dataflow.ISourceBlock(Of )
The source from which to receive the value.
- Type: System.TimeSpan
The maximum time interval, in milliseconds, to wait for the synchronous operation to complete, or an interval that represents -1 milliseconds to wait indefinitely.
- Type: System.Threading.CancellationToken
The token to use to cancel the receive operation.
The received value.
Usage NoteIn Visual Basic and C#, you can call this method as an instance method on any object of type ISourceBlock(Of ). When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
The source is Nothing.
timeout is a negative number other than -1 milliseconds, which represents an infinite time-out period.
timeout is greater than MaxValue.
No item could be received from the source.
The specified time-out expired before an item was received from the source.
The operation was canceled before an item was received from the source.