CODEWITHSUNDEEP
c#asp.netasp.net-mvcasynchronousasync-await
TBA
TBA

Reputation: 1187

Why Task.Factory.StartNew().continuewith() Not working as expected

In Asp.Net MVC project I have an Asynchronus controller, wand I also have an action of type Task to implement Asynchronus functionality.

Well I have the following code, 

Action startMethod = delegate() { CreateUserFunctionality(user.UserID); };
            return Task.Factory.StartNew(startMethod).ContinueWith(
                    t =>
                    {
                        return (ActionResult)RedirectToAction("Profile", "UserProfile");
                    });

And I also has, CreateUserFunctionality as

public void CreateUserFunctionality(int UsrId)
{
  if (UsrId !=0)
  {
     _userService.NewFunctionality(UsrId);
  }
}

I expect that the function will start the job, CreateUserFunctionality and returns the view for me which is written in ContinueWith function. However in my case that continuewith part always waits for the CreateUserFunctionality to complete. My aim was to return the view immediatly and not wait for CreateUserFunctionality to finish, as It should continue in background. Please let me find out what I am missing here.

Upvotes: 0

Views: 2723

Answers (1)

Selman Genç
Selman Genç

Reputation: 101681

Ofcourse it will wait because you are using ContinueWith method.If you don't want to wait just start your task, and leave it.Return your ActionResult immediately:

 var task = Task.Factory.StartNew(startMethod);
 return RedirectToAction("Profile", "UserProfile");

From documentation:

Task.ContinueWith Method : Creates a continuation that executes asynchronously when the target Task completes.

So it is working as expected.

Upvotes: 1

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