Dois-je disposer SPWeb ou SPList?

Question

Je suis en train de faire un tas de choses avec un SPWeb et beaucoup SPLists. Si je web simplement disposer dans la section finally serait Cédant tous SPLists que j'instancié? (BTW, je comprends le concept de using, donc devrais-je mettre en œuvre à la place using?)

Answer 1

objets SPList ne peuvent être jetés.

Answer 2

I recommend installing and running this tool to check whether you are disposing your objects correctly: SPDisposeCheck

Answer 3

The rule is complicated, but in a nutshell, you should dispose of any object that you create yourself that implements the IDisposable interface.

In the context of SharePoint, this includes:

• Any SPSite object you create using siteColl.OpenWeb(), returned by SPSiteCollection.Add, by the SPSiteCollection[] index operator, or yielded in a SPSiteCollection foreach loop
• Any SPWeb object returned from SPSite.AllWebs.Add, SPWebCollection.Add, the SPSite.AllWebs[] index operator or yielded in an SPSite.AllWebs foreach loop.

There are many more cases outlined in the Best Practices: Using Disposable Windows SharePoint Service Objects article on TechNet.

Note that SPList is not in this list (because it does not implement IDisposable, nor is SPList.RootWeb (because you don't create the RootWeb object, you just get a reference to it).

Note that your code is unlikely to compile if you try to Dispose an object like SPList that doesn't implement IDisposable, because that object will not have a Dispose method. On the other hand, you won't get an error if you try to dispose RootWeb, because it is an SPWeb object with a Dispose method - but doing this will cause problems if you try to refer to that web or any of it's children later in your code.

The using statement is a bit of syntactic sugar, but I prefer to use it because it ensures that the object is always disposed correctly, and it doesn't require explicit code to ensure that this happens.