Programming with .NET - General

Re: Re: Calling WCF Service with an out parameter

ctsraj — Thu, 19 Mar 2009 11:10:09 GMT

Please check the result

void client_GetCitationCollectionCompleted(object sender, GetCitationCollectionCompletedEventArgs e)

{

diseaseEvent(sender, new DiseaseEventArgs(e.OMID));

}

OMID is the "out" Parameter in my WCF Service.

Re: Re: Calling WCF Service with an out parameter

venkatgude — Thu, 27 Nov 2008 09:48:53 GMT

Hi,

How to pass ref paramer from silver light application to webservice.

I declared a method Test(string s ,ref string test)

How to call this method from silverlight

Thanks

Venkat

Re: Re: Calling WCF Service with an out parameter

Allen Chen – MSFT — Wed, 19 Mar 2008 09:36:39 GMT

Hi:

I tested it and it works fine. I guess what you really need is ref instead of out? Try this:

GetData(int id, ref object test)

Regards

Re: Re: Calling WCF Service with an out parameter

dotnetmac — Wed, 19 Mar 2008 08:42:40 GMT

Hi there,

First of all the method in SL application doesn't even ask the out parameter.

Say i have a service method GetData(int id, out object test), when i add a service reference, the parameters asked are just the id but not the out parameter.

Re: Calling WCF Service with an out parameter

Allen Chen – MSFT — Wed, 19 Mar 2008 07:18:33 GMT

Hi:

If you use output parameters GetDataCompletedEventArgs will have relevant property for you to use. Say the parameter is called param1 you can retrieve it via:

void proxy_GetDataCompleted(object sender, SilverlightApplication1.ServiceReference1.GetDataCompletedEventArgs e)
{

//e.param1

}

Regards

Re: Re: Calling WCF Service with an out parameter

SpoonStomper — Mon, 17 Mar 2008 18:21:59 GMT

This seems to be an odd situation, because looking at the References.cs for a webservice, the out parameter exists in the callbacks but not in the actual calls.

Re: Re: Calling WCF Service with an out parameter

SpoonStomper — Mon, 17 Mar 2008 17:56:02 GMT

Hey dude,

Oops, I wasn't aware that the proxy could handle such a thing as an out parameter. Pretty cool. Is there a reason that you are writing so much code to access the webservice. Didn't Visual Studio create a proxy class that you can instantiate and call methods on?

StompIt!

Re: Re: Calling WCF Service with an out parameter

dotnetmac — Mon, 17 Mar 2008 17:01:47 GMT

Hey dude,

The web service is in production environment, so i cannot change it. Please tell me how to pass an out parameter from an SL application

thanx

Re: Calling WCF Service with an out parameter

SpoonStomper — Mon, 17 Mar 2008 15:19:10 GMT

The idea of an out parameter is that the method will instantiate the null reference that you pass in. A web service is stateless; therefore the handle that you have on an object that goes into a webservice as a parameter will not be the same as the one that makes it into the webservice server side. The nature of this prevents out parameters.

Instead: Create a return object that is composed of everything you need.

Stomp it!

Calling WCF Service with an out parameter

dotnetmac — Mon, 17 Mar 2008 13:01:16 GMT

Hi there,

How do i call a WCF web service which has an out parameter,

Example:

My service has the following signature

public List<Entity> ListAll(string languageID, out ResultObject resultObject) { }

When i consume this service in my SL application (code below), i only get to pass the languageID not the resultObject

Binding binding = new BasicHttpBinding();

EndpointAddress address = new EndpointAddress("http://localhost:5309/ContextManager/EntityService.svc");

ContextManager.EntityService.EntityServiceClient proxy = new ListViewDataGrid.ContextManager.EntityService.EntityServiceClient(binding, address);

proxy.ListAllCompleted += new EventHandler<ListViewDataGrid.ContextManager.EntityService.ListAllCompletedEventArgs>(proxy_ListAllCompleted);

proxy.ListAllAsync("en-US"); // it is not asking for the ResultObject parameter.

Thanx in advance