Silverlight 4 WCF RIA Service Timeout Problem

I have a Silverlight 4 usercontrol that ca开发者_运维技巧lls a very long running WCF RIA service. As shown below, I am increasing the default timeout period.

_domainContext = new WindowsDashboardDomainContext();
// Increase timeout -- this can be a very long running query
((WebDomainClient<WindowsDashboardDomainContext.IWindowsDashboardDomainServiceContract>)
_domainContext.DomainClient).ChannelFactory.Endpoint.Binding.SendTimeout = new TimeSpan(99, 0, 0);
    _domainContext.GetSections( "All", "All", "All" ).Completed += GetAllSectionsCompleted;

Unfortunately, it seems to ignore this timeout and still throws the timeout exception:

Error: Unhandled Error in Silverlight Application Load operation failed for query 'GetClicks'. An error occurred while executing the command definition. See the inner exception for details. Inner exception message: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)

Why is this happening?

I answered the same question here: WCF ria service SP1 timeout expired

The answer:

I'll explain my context and I wish it will work for my. I'm sure about that.

First of all to call RIA services, and using some domain context, in my example:

EmployeeDomainContext context = new EmployeeDomainContext();
InvokeOperation<bool> invokeOperation = context.GenerateTMEAccessByEmployee(1, 'Bob');
invokeOperation.Completed += (s, x) =>
    {....};

Nothing new until here. And with this I was facing every time that same timeout exception after 1 minute. I spend quite a lot of time trying to face how to change the timeout definition, I tried all possible changes in Web.config and nothing. The solution was:

Create a CustomEmployeeDomainContext, that is a partial class localizated in the same path of the generated code and this class use the hook method OnCreate to change the behavior of created domain context. In this class you should wrote:

public partial class EmployeeDomainContext : DomainContext
{
    partial void OnCreated()
    {
        PropertyInfo channelFactoryProperty = this.DomainClient.GetType().GetProperty("ChannelFactory");
        if (channelFactoryProperty == null)
        {
            throw new InvalidOperationException(
              "There is no 'ChannelFactory' property on the DomainClient.");
        }

        ChannelFactory factory = (ChannelFactory)channelFactoryProperty.GetValue(this.DomainClient, null);

        factory.Endpoint.Binding.SendTimeout = new TimeSpan(0, 10, 0); 

    }
}

I looking forward for you feedback.

There are two possibilities that come to mind:

1. You have not configured your DomainService to serilalize enough objects. The default is very small. Try this tip I put in yesterday to increase the resultset allocation
2. Your data source may be timing out. In that case you need to increase the command timeout for LINQ to SQL, EF, or ADO.NET accordingly. This is the less likely cause, but one to consider.