add or update a element and web object dispose

Question

Hey,

When I add or update a element on a list or library and dispose the web or site object it will run in an error.

SPWeb web = SPContext.Current.Web;
SPList list = web.Lists[“List”];
SPListItem liItem = list.Items.Add();
...
liItem.Update();
web.Dispose();

But when I don’t dispose the web object it runs perfect.

What can I do to dispose the web object?

Thanks for your help

Stefan

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Viele Grüße Stefan

Kontakt unter [e-mail]

Answer 1

Hello!

SPContext.Current.Web shouldn't be disposed in your code, this object is managed by the SharePoint framework. Here is an article describing the best practice in disposing SP objects.

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.Net Follower (http://dotnetfollower.com)

Answer 2

You only need to dispose of SPSite and/or SPWeb objects if you have created them yourself using the new  operator.

SPContext objects are managed by the framework and should not be explicitly disposed in your code, as it may (as you have experienced) result in program failure.  So you shouldn't for example put a reference to a SPContext inside a using statement like the sample below, since it will probably try to implicitly dispose of the object.

using ( SPWeb web = SPContext.Current.Web)  // bad practice
{
}

SPWeb web = SPContext.Current.Web;        // good practice

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Kind Regards

Bjoern
http://www.sharepointviking.com
Twitter: Follow @bjoern_rapp

Answer 3

Bjoern,

saying "you ... need to dispose ... objects ... created using the new  operator", you can easily confuse people as we often use, for example, SPSite.OpenWeb() to get an SPWeb object, so in this case we don't use new operator, but we have to dispose the SPWeb object.

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.Net Follower (http://dotnetfollower.com)