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c#.netasynchronousasync-await
Lewis Smith
Lewis Smith

Reputation: 37

How can I use async over 3 different array elements

I want to use Async to perform a function over 3 different arrays.

Currently I have a nested foreach loop over the 3 arrays, however that seems to break the actual intention of Async.

This is the method where I'm iterating over the code:

    public void newclient(Form f, string[] username, string[] password, string[] server) { 

        foreach(string thisserver in server) {
            foreach (string thispassword in password) {
                foreach (string thisusername in username) {

                    Console.WriteLine(thisserver);

                    Task<string> Task = SpawnClient(f, thisusername, thispassword, thisserver);
                    Console.WriteLine(Task);
                }
            }
        }

This is the Async method it's calling:

   public async Task<string> SpawnClient(Form f, string nextusername, string nextpassword, string nextserver) {

///////////////dostuffhere

    }

I have tried playing with things such as TaskCompletionSource's, but I think I'm misunderstanding Async at the moment. It's my first time using it.

Upvotes: 1

Views: 764

Answers (1)

Vlad
Vlad

Reputation: 35594

Perhaps you want this:

List<Task<string>> tasks = new List<Task<string>>();
foreach(string thisserver in server) {
    foreach (string thispassword in password) {
        foreach (string thisusername in username) {
            Console.WriteLine(thisserver);
            Task<string> task = SpawnClient(f, thisusername, thispassword, thisserver);
            tasks.Add(task);
        }
    }
}
var allResults = await Task.WhenAll(tasks);

You'll need to redeclare newclient as async Task or (only if your newclient is an event handler) async void.

Upvotes: 2

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