Programming with .NET - General

calling wcf service problems

I created a simple wcf service added servicereference to silverlight project and when I access the service I get the following error. if I create a website and add servicereference to the same service it works just fine, so there is no problem with the service

any Ideas?

An exception of type 'System.ServiceModel.CommunicationException' occurred in System.ServiceModel.dll but was not handled in user code

Additional information: [CrossDomainError]
Arguments:
Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=2.0.30226.2&File=System.ServiceModel.dll&Key=CrossDomainError

Re: calling wcf service problems

any help?

Re: calling wcf service problems

By default WCF services are set to use the wsHttpBinding. You will need to change that to BasicHttpBinding in your web.config. Hopefully that is the problem.

Re: calling wcf service problems

it is set to BasicHttpBinding. I am afraid that is not the problem

Re: calling wcf service problems

Ok, shot in the dark here but where is the WCF service being hosted? Is it on a different domain/port than where the SL plugin is being loaded from? Just trying to see if the CrossDomain error reported is relevant. If indeed they are on two different domains (and this includes different development ports) then you will need to place a cross domain policy file with the WCF service.

Re: calling wcf service problems

Ya, and related to this last post, here is an article that goes over URL Access Policy and ways to get cross domain access: http://msdn2.microsoft.com/en-us/library/cc189008(vs.95).aspx

Re: calling wcf service problems

WCF service is in the same solution hosted on the same box(localhost), I created the policy file dropped in C:\Inetpub\wwwroot, still no luck

Re: Re: calling wcf service problems

Can you post your server web.config and the client code which establish the proxy?

The problem seems to be belong to endpoint address.

Re: Re: calling wcf service problems

Here it is

<system.serviceModel>

</behavior>

</serviceBehaviors>

</behaviors>

</identity>

</endpoint>

</service>

</services>

</system.serviceModel>

and the client code

BasicHttpBinding b = new BasicHttpBinding();

ServiceReference1.ModulesClient client = new ModulesClient(b, new EndpointAddress(new Uri("http://localhost:8082/WebSite1/Modules.svc")));

client.DoWorkCompleted += new EventHandler<DoWorkCompletedEventArgs>(client_DoWorkCompleted);

client.DoWorkAsync();

void client_DoWorkCompleted(object sender, DoWorkCompletedEventArgs e)

{

int i = 0;

}

Re: Re: calling wcf service problems

Hello, your service use the port 8082. Then what's the port of the web site hosting the Silverlight application? If the port numbers are different, it's considered as cross domain. Does your IIS use the port 8082? By default it uses 80. Have you deployed both your service and Silverlight application on IIS, or are you using an ASP.NET test server? Put a policy file under C:\Inetpub\wwwroot only affects IIS. It doesn't affect any ASP.NET test servers.

Re: Re: calling wcf service problems

the port number is set to 8082 and Use dynamic ports is set to false. it is not hosted in IIS. it is filesystem based

Re: Re: calling wcf service problems

Thus you should put your cross domain policy file under the root of your web service project.

Re: Re: calling wcf service problems

Here is a link to the project

http://cid-71b364b59919d1e8.skydrive.live.com/self.aspx/docs/Example2.rar

Can you tell me what I am doing wrong

Re: Re: Re: calling wcf service problems

I cannot download your *.rar file due to my company policy. If your service is located at http://localhost:8082/WebSite1/Modules.svc, than the SVL page should be located there as well, e.g. http://localhost:8082/WebSite1/TestPage.html if you don't put the cross domain config under WebSite1/

HTH

Re: Re: calling wcf service problems

Well, looks like the ASP.NET test server maps the root folder to http://localhost:8082/WebSite1. Thus the policy file is placed under http://localhost:8082/WebSite1. This will not work. Sorry I can't figure out how to make ASP.NET test server to map the root folder to http://localhost:8082. Can you use IIS instead? After I deployed your service to my IIS, and add the policy file to wwwroot folder, I've successfully called the service. Also note you must run your Silverlight application from http protocol. When creating a new Silverlight project, make sure to choose add a new web site. If you choose to just create a dynamic test page, your application will run from the file system.

Re: Re: calling wcf service problems

I am having the same problem, and tried to follow this thread to solve it. Not successful. My service is located at: C:\Dev\SilverlightApplication1\WcfService1\service1.svc with URL as http://localhost/WcfService1/service1.svc. My IIS default web site is: http://localhost/, and it's mapped to C:\Inetpub\wwwroot. I created a policy file at: C:\Inetpub\wwwroot. And it can be accessed by http://localhost/crossdomain.xml as instructed by the Microsoft document. My SL client is running by WebDev.WebServer with a dynamic port, which is not my choice. It's created like that even when I selected web site option. Things just don't work. I get CrossDomainError every time.

Re: Re: calling wcf service problems

I also have been following this thread and still cannot call my web service from my SL2 Beta 1 app. I have a WCF service on a live server.

I've changed the binding in web.config to basicHttpBinding and went into IIS and created a new "Application" on the server for the folder my service resides in. I also added crossdomain.xml and clientaccesspolicy.xml to both the root of my site and the webservice's folder. And in case you're wondering, the .svc URL loads fine in a browser (no errors).

In my SL2 project I've added a service reference via the live url. It appeared to add fine.

In my code I call:

Dim WithEvents ServerObject As New Server_Samples.ServicesClient(New System.ServiceModel.BasicHttpBinding, New System.ServiceModel.EndpointAddress(New Uri("http://mylivesite.com/Service1/Services.svc")))

ServerObject.MyFunctionAsync(Param1, Param2) ' this bombs out inside my proxy class's BeginMyFunction method

An exception of type 'System.ServiceModel.CommunicationException' occurred in System.ServiceModel.dll but was not handled in user code

Any help would be greatly appreciated! I've been trying everything I can think of for the majority of the day and still can't get it to work.

fyi: I also tried to hit this exact same service from a WinForms app and it worked fine.

Re: Re: calling wcf service problems

I am having the exact same error. This seems to be a widespread thing?

Re: Re: calling wcf service problems

I can run my app in the VS2008 testing server and it works ok in IIS.

However, is not working when accessed from a remote machine.

I have the crossdomain file and the ports are open for web.

I must have something missin'

calling wcf service problems

The webservice was not properly setup on the Silverlight app.

I could not find an easy way to fix than to open the Web Service References folder and scan and change every file for the webservice's url.

I didn't work when:

trying to remove the service and readd it using the public ip address.(previously using the local machine name)