How to get parent task's ID?

Question

Hello, there,

Is there any way to get parent task's ID? The parent-child relationship has been established when they are created.

Thanks.

Answer 1

Hi, Tao,

There is no way to get a reference to the parent task from inside the child task, however, if you have full control of both the parent and child tasks, you can retrieve their individual Ids either by pulling their public Id property or calling the statis Task.CurrentId (which will return the id of the current running task) from the relevant task.

Task parent = Task.Factory.StartNew(() =>
{
    Console.WriteLine("Parent ID: {0}", Task.CurrentId);
    
    Task child = Task.Factory.StartNew(() =>
        {
             Console.WriteLine("Child ID: {0}", Task.CurrentId);

         }, TaskCreationOptions.AttachedToParent);
    
    Console.WriteLine("Child ID: {0}", child.Id);

});

Console.WriteLine("Parent ID: {0}", parent.Id);

Thanks

Answer 2

Hi Tao-

For what purpose do you need the parent ID?  I'm just looking to better understand the scenario that demands this.

Thanks,
Steve

Answer 3

So, where is Parallel Tasks window (in debugger) getting "Parent" ID for a task?