CreateList Help

I’m writing here more for help than declaring this an issue as I’m pretty sure this is more related to my lack of experience with async methods.

I am moving my organization to MC, and trying to create a wrapper class in my business logic to pass other business objects into it, and then utilize your methods. I have been able to run GetAll() methods and return data from MailChimp, but have not been able to create lists or members.

Here’s a sample of my code:

public class myChimp
{
       private MailChimp.Net.MailChimpManager account { get; set; }

        public AIAChimp() 
        {
            account = new MailChimp.Net.MailChimpManager("defaultAPIKey");
        }
        public AIAChimp(string apiKey)
        {
            account = new MailChimp.Net.MailChimpManager(apiKey);
        }

        public async System.Threading.Tasks.Task<IEnumerable<MailChimp.Net.Models.List>> GetLists()
        {
            var listCollection = await account.Lists.GetAllAsync().ConfigureAwait(false);


            return listCollection;
        }

        public async System.Threading.Tasks.Task<MailChimp.Net.Models.List> CreateList(string listName)
        {
            var list = new MailChimp.Net.Models.List { Name = listName, 
                    PermissionReminder = "default", 
                    CampaignDefaults = { FromEmail = "[e-mail]", 
                    FromName = "myCompany" }, Contact = { Company = "myCompany" } };

            return await account.Lists.AddOrUpdateAsync(list).ConfigureAwait(false);

        }
}

So with that, when I run these commands, the first works, and these second one throws an error at t2.Wait(), site a null value:

myChimp c = new myChimp();
            System.Threading.Tasks.Task<IEnumerable<MailChimp.Net.Models.List>> t = c.GetLists();
            t.Wait();
            foreach (MailChimp.Net.Models.List list in t.Result)
            {
                id = list.Id;
                Console.WriteLine(list.Name + " - " + list.DateCreated + " - " + list.Id + " - " + list.Stats.MemberCount);
            }

            System.Threading.Tasks.Task<MailChimp.Net.Models.List> t2 = c.CreateList("All US Staff");
            t2.Wait();
           Console.WriteLine(t1.Result.Id);

Right now, I am using a Free Account. I can also see errors in the API Status of my account for /PUT stating “The requested resource could not be found.”

[brandonseydel]

var c = new myChimp();
var t = await c.GetLists();

foreach(var list in t){
  id = list.Id;
  Console.WriteLine(list.Name + " - " + list.DateCreated + " - " + list.Id + " - " + list.Stats.MemberCount);
}

var t2 = await c.CreateList("All US Staff");
Console.WriteLine(t1.Id);

You should make your logic layer let the user know that your methods are async by suffixing your methods with async… ex.

var c = new myChimp();
var t = await c.GetListsAsync();

Also configureawait(false) will prevent deadlocks when users are using your logic layer so should be added until you want to dispatch back onto the main thread (UI layer)

[AJGarrett]

I found my issue. I wasn’t passing all the required fields for creating a list.