DevForce 2012: Questions about Migration and Async

Print Page | Close Window

Questions about Migration and Async

Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2012
Forum Discription: For .NET 4.5
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=3891
Printed Date: 08-Apr-2025 at 3:10am

Topic: Questions about Migration and Async

Posted By: iDave
Subject: Questions about Migration and Async
Date Posted: 14-Jan-2013 at 6:15pm

Good day,

I've migrated from 2010 to 2012 and some code doesn't work. All of them related to async.
So, I wonder if someone could be so kind to give me a hint here.

For example:

Here's what I was doing back in 2010:


        public void GetCustomers(Action<IEnumerable<Customer>> onSuccess, Action<Exception> onFail)
        {
            Manager.Customers
              .Include(c => c.Address)
              .OrderBy(c => c.Id)
              .ExecuteAsync(
                  op =>
                  {
                      if (op.CompletedSuccessfully)
                      {
                          if (onSuccess != null) 
                              onSuccess(op.Results);
                      }
                      else
                      {
                          if (onFail != null)
                          {
                              op.MarkErrorAsHandled();
                              onFail(op.Error);
                          }
                      }
                  }
               );
        }

How should I convert it to 2012 in order to have this code working again?

Thanks in advance!

Replies:

Posted By: smi-mark
Date Posted: 14-Jan-2013 at 6:32pm

Hi,

I would suggest you read up on Tasks, it replaces coroutines. Essentially the code would look like this:

public Task<IEnumerable<Customer>> GetCustomers()
{
    return await Manager.Customers
        .Include(c => c.Address)
        .OrderBy(c => c.Id)
        .ExecuteAsync();
}

I just typed that up in notepad, so I may be slightly off. As you can see it is a lot less code.

In your VM you can then write code like this:

var customers = await Repository.GetCustomers();

you can also wrap try statements around them now, unlike coroutines. ie:

try
{
await MyRoutine();
}
catch (MyException ex)
{
}

etc

I would strongly advise looking at the TempHire and other examples that have been updated to DF 2012

Posted By: smi-mark
Date Posted: 14-Jan-2013 at 6:35pm

If you can't upgrade all your code right now, you can use the compatibility pack.

This link will explain it:

http://drc.ideablade.com/devforce-2012/bin/view/Documentation/cocktail-backward-compatibility

Posted By: iDave
Date Posted: 14-Jan-2013 at 6:38pm

Thank you for your lighting-fast reply!

Indeed, the code is more shorter and clean.. I'm now taking a look at TempHire sample and will look forward to the Compatibility Pack if the there's a lot of code and no time to upgrade all.

Thanks again!

Regards,
Dave

Print Page | Close Window