Silverlight object model async or sync calls

Question

Hello All,

Whether SharePoint 2010 Silverlight Client Object Model calls (ExecuteQuery() i.e, Synchronous call) or (ExecuteQueryAsync(ClientRequestSucceededEventHandler, ClientRequestFailedEventHandler) i.e, Asynchronous call)? or both?

According to this article it uses both. But on internet we don't have examples on ExecuteQuery() method.

Somebody clarify me.Thnx

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Answer 1

You can use both, but if you are executing commands in the main UI thread you have to use the asynchronous method.

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Regards Bjoern

Answer 2

Thanks for the reply

Can I have an example for Synchronous call(ExecuteQuery())?

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Answer 3

Silverlight only allows ansynchronous calls.

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Blog | SharePoint Field Notes Dev Tool | ClassMaster

Answer 4

Steve, that's not entirely true, it's possible to use synchronous calls in threads  that don't  interact with the UI thread.

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Regards Bjoern

Answer 5

I understand. An asynchronous call is launching another thread. It is easier to call and manage the return values by calling the ExecuteQueryAsync than manually creating another thread and another delegate just to call the synchronous method. It is easy to manage async calls in Silverlight with in-line delegates.

context.ExecuteQueryAsync((object eventSender, ClientRequestSucceededEventArgs args1) =>
            { }, (object sender, ClientRequestFailedEventArgs eventArgs) =>
            {
                string message = eventArgs.Message;
            }
            );

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Blog | SharePoint Field Notes Dev Tool | ClassMaster

Answer 6

Hi  Bjoern H Rapp,

can you please share any link for sync calls also in SilverLight?

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