Question

I am digging into LINQ–trying to understand basic models (it seems pretty cool to me). The code below is the code to perform before committing an update.

   Linq01.Account acc = context.Accounts.Single( pc => pc.AccountID == AccountID );    acc.Name = textboxAccountNameRead.Text.Trim();    context.SubmitChanges(); 

So far, so good. But what do you do if the Single() method failed–if the account ID wasn’t found?

Thank you!

Answer 1

You should use SingleOrDefault, if the query does not return a value you can check it against null:

var acc = context.Accounts.SingleOrDefault(pc => pc.AccountId == AccountId); if(acc != null) {   acc.Name = textboxAccountNameRead.Text.Trim();   context.SubmitChanges(); }