CODEWITHSUNDEEP
c#.netmultithreadingtask-parallel-librarytask
Osman Esen
Osman Esen

Reputation: 1696

Getting the completed task Id using Task.WaitAny()

I know that my goal can be achieved by using Task.WhenAny() but I will not deal with async await if I can avoid it, in order to prevent deadlocks. I have following code: 

try
{
   Task.WaitAny(this.Tasks.ToArray());
   foreach (var task in this.Tasks)
   {
      if (task.IsFaulted || task.IsCanceled)
      {
         if (task.Exception.InnerException is OperationCanceledException)
         {

         }
      }
   }                    
}  
catch (OperationCanceledException o)
{
   // Handling cancelled tasks
}              
catch (Exception e)
{
   // Handling faulted tasks
}

And I for instance want to know exactly the id of my task, which has faulted or the Id of my task which has been cancelled. I have tried to do so as shown in the try block above, but this is not a solution since it also will throw an exception for tasks that has been cancelled before. Can I obtain a solution for this problem using Task.WaitAny() ?.

Upvotes: 1

Views: 1096

Answers (1)

DavidG
DavidG

Reputation: 118987

From the documentation of Task.WaitAny:

Return Value

Type: System.Int32

The index of the completed Task object in the tasks array.

So you can do this:

var taskIndex = Task.WaitAny(this.Tasks.ToArray());
var task = this.Tasks[taskIndex];

Upvotes: 4

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