Dataflow Task.WhenAll causes A task was canceled Exception RRS feed

  • Question

  • I am new to Dataflow, and I follow this walkthrough How to: Cancel a Dataflow Block.
    I click add button first, and then click cancel, but I got exception about "A task was canceled Exception" after clicking cancel button. I fail to find any way to resolve this error.
    Any help would be appreciated.

    Help each other

    • Edited by Tony---- Wednesday, November 29, 2017 9:44 AM
    Wednesday, November 29, 2017 9:43 AM