Call a WCF Service method from Silverlight Web app

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Hi
I am developing a silverlight web application which uses WCF service methods to interact with database..
I got System.ServiceModel.CommunicationException. I dont know where it went wrong. Here is the code section Im using...

In MainPage.xaml.cs:

private void btnUpdate_Click(object sender, RoutedEventArgs e)
        {
            c.GetNameCompleted += new  EventHandler<GetNameCompletedEventArgs>(c_GetNameCompleted);
            c.GetNameAsync();
        }

        void c_GetNameCompleted(object sender, GetNameCompletedEventArgs e)
        {
            txtCustName.Text = (string)e.Result;
        }

Thanks in Advance,
Naresh.

Posted 3-Mar-11 3:01am

S.M.Naresh

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Ramalinga Koushik · Answer 1 · 2011-03-03T03:03:00

Solution 1

The issue is when you add a WCF service in your asp.net web project it by default adds the wsHttpBinding as a default configuration. Now looks like the Silverlight does not have WSHttpBinding implemented yet so I was using BasicHttpBinding on the client side. WSHttpBinding uses SOAP 1.2 while BasicHttpBinding uses SOAP 1.1 & hence the protocol exception. The solution as you might guess is to change your web.config to have binding="basicHttoBinding" -> refresh the service ref in SL project.

Posted 3-Mar-11 3:03am

Ramalinga Koushik

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S.M.Naresh 4-Mar-11 0:45am

Hi Koushik
Thanks for your help.Eventhough the binding is BasicHttpBinding,I got the same error. Let me give detail outlook of my scenario.
Im developing a SL Web app.I created a Wcf service application where the wcf methods interact with DB.I used Svcutil.exe to create a client and output.config file which I included in Silverlight project.Now I call the method GetName() of the CustomerService (tool generated wcf client)and now I got InvalidOperationException giving detail "Could not find default endpoint element that reference Contract ICustomerService... ".I have tried various approaches and modified config files but could not find any solution...