In my Silverlight client I have a partial class created by setting a WCF reference. I've extended this class adding a few RelayCommand properties. I need to initialize these properties which I would normally do in the constructor. However it seems that the constructor is not being called, which I believe is a result of of VTS However I'm also unsuccessful in using the OnDeserialized attribute.
What is the prescribed way to initialize client side data members of a WCF class.
I've created a sample project and everything works as expected. If this code doesn't help - post your data contract and client code.
namespace SilverlightApplication3.ServiceReference1
{
public partial class SomeModel
{
public string ExtendedProperty { get; set; }
[OnDeserializing]
public void OnDeserializingMethod(StreamingContext context)
{
this.ExtendedProperty = "Ok";
}
}
}
Service method call:
var proxy = new ServiceReference1.Service1Client();
proxy.DoWorkCompleted += (s,e) => Debug.WriteLine(e.Result.ExtendedProperty); //Ok
proxy.DoWorkAsync();
Related
I am writing an application using Prism that contains three modules. First one has a view to configure a "Person", second one is a service that generates that "Person" and third one is the visualization of all people. These three modules communicate with EventAggregator system. But I have problems with the messages on the service one.
In this service module I only have the service implementation and the module definition.
This service is a people manager that receives a message from EventAggregator, creates a "Person" with a task and send a message to the third module with this "Person".
Service:
private List<Person> people = new();
public PeopleControllerService(IEventAggregator eventAggregator, ICommonParametersService commonParameters)
{
this._eventAggregator = eventAggregator;
eventAggregator.GetEvent<GeneratePersonEvent>().Subscribe(GeneratePerson);
this._commonParameters = commonParameters;
}
private void GeneratePerson()
{
Person newPerson = new(this._commonParameters.DefaultPersonTask);
this.People.Add(newPerson);
this._eventAggregator.GetEvent<AssignedPersonEvent>().Publish(newPerson);
}
Module definition:
private PeopleControllerService moduleController;
public void OnInitialized(IContainerProvider containerProvider)
{
IEventAggregator eventAggregator = containerProvider.Resolve<IEventAggregator>();
ICommonParametersService commonParametersService = containerProvider.Resolve<ICommonParametersService>();
this.moduleController = new(eventAggregator, commonParametersService);
}
public void RegisterTypes(IContainerRegistry containerRegistry)
{
}
The problem is that when I send the "GeneratePersonEvent" message it never reaches the PeopleControllerService and the "GeneratePerson" method is never executed.
I've tried using a view and a viewModel, programming the service in the viewModel and assigning the view to a dummy and hidden region in the app and I've verified that it works that way.
Modified module definition:
public void OnInitialized(IContainerProvider containerProvider)
{
IRegionManager regionManager = containerProvider.Resolve<IRegionManager>();
regionManager.RequestNavigate(RegionNames.DummyRegion, "PeopleController");
}
public void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterForNavigation<PeopleController>();
}
How can I use the EventAggregator without using a dummy view? Do I have to add something in the "RegisterTypes" method? I've tried with:
public void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.Register<PeopleControllerService>();
}
but it doesn't work either.
I've checked this post: Can I get EventAggregator Subscribe Message without view, viewmodel in prism?, and there it says that it is possible, but doesn't describe how to implement.
Most of the time you want exactly one instance of a service, and you have to tell the container:
public void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterSingleton<PeopleControllerService>();
}
Also, you want your service to implement an interface so that you can pass different implementations to the consumers of your service, the most obvious case is your tests.
You need to actually create the instance of your service, too. Normally, you inject it into some consumer, but if it's completely decoupled and only talks through the event aggregator, you have to create the instance manually:
// in App.xaml.cs
protected override void OnInitialized()
{
Container.Resolve<PeopleControllerService>();
base.OnInitialized();
}
Hint: if the service implements an interface, the application doesn't need to personally know the controller module.
I have the following Wcf Data Service:
public class WcfDataService : DataService<WcfDataServiceContext>
{
public static void InitializeService(DataServiceConfiguration config)
{
config.SetEntitySetAccessRule("*", EntitySetRights.All);
config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);
config.UseVerboseErrors = true;
}
[WebGet]
public IQueryable<Person> GetPeopleByName(string name)
{
WcfDataServiceContext context = this.CurrentDataSource;
var match = from p in context.People
where p.FirstName == name
select p;
return match;
}
I can access the custom method from the browser like this:
http://127.0.0.1:8080/DataService/WcfDataService.svc/GetPeopleByName?name='Daniel'
How can I call that method and get that list of Person from a Silverlight application?
I'm using Visual Studio 2012, Silverlight 5, .NET Framework 4.0.
As far as I remember whe using Silverlight you cannot connect to a different server than the one the Silverlight app came from so you would just use a relative Uri. If you would like to use WCF Data Services client you can take a look here: http://forums.silverlight.net/t/208481.aspx - there is a code snippet that shows it. However AFAIK WCF Data Services client does not support Service Operation so you may need to use XmlReader to be able to query and parse the response of the GetPeopleByName function.
I did it before I can share.Service Reference your domain:8080/DataService/WcfDataService.svc then
For Person object use [DataContract] attribute for properties of Peson use [global::System.Runtime.Serialization.DataMemberAttribute()] By this way you say Serialize and create proxies to Bus side. Notice this attributes because it really works!
//Here is the interface attributes are important
namespace AHBSBus.Web.Services
{
[ServiceContract]
public interface IChatService
{
[OperationContract]
bool LogIn(Guid userID,Guid roomID);
[OperationContract]
bool LogOut(Guid userID,Guid roomID);
[OperationContract]
IEnumerable<VW_CHATUSERDETAIL> GetLatestMessages(Guid userID,Guid roomID,Guid lastSyncMessageID);
[OperationContract]
bool SendMessage(Guid fromID, Guid roomID, Guid toID, string message);
[OperationContract]
IEnumerable<ChatUser> GetLoggedInUsers(Guid roomID);
[OperationContract]
bool IsLogin(Guid roomID,Guid userID);
}
}
//Implementation of service
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public partial class ChatService:IChatService
{
//Here goes
}
I have a need to pass an HTTP header for each an every RIA Service request being made from a Silverlight app. The value of the header needs to come from the app instance, and not from a cookie. I know this can be accomplished by putting it in the DTOs, but it's not an option because a lot of our service calls use Entities and change sets, so there's no base class to tie into for all requests. So I'm looking for a centralized and safe means to pass something back with each request so the developers do not have to worry with it. A custom HTTP header would work fine, but I don't know how to intercept the outbound request to set it.
Anyone have any ideas I can try?
On the lower level you can add HTTP headers with the help of an IClientMessageInspector. Try starting from this post on SL forum.
The next step depends on your use cases.
If the value of the header must be the same for any method called by the DomainContext, then you may just extend the context using partial class, add a property for the header value and use that property in the inspector.
If you need to pass a different value for each method call, you'd probably need to wrap your DomainContext into another class and add an argument to each method of the context that will accept the header value and pass it to the inspector somehow. Needless to say, without a code-generator this would be hard.
Here's an adapted sample from the SL forum for the first case:
public sealed partial class MyDomainContext
{
public string HeaderValue { get; set; }
partial void OnCreated()
{
WebDomainClient<IMyDomainServiceContract> webDomainClient = (WebDomainClient<IMyDomainServiceContract>)DomainClient;
CustomHeaderEndpointBehavior customHeaderEndpointBehavior = new CustomHeaderEndpointBehavior(this);
webDomainClient.ChannelFactory.Endpoint.Behaviors.Add(customHeaderEndpointBehavior);
}
}
public class CustomHeaderEndpointBehavior : IEndpointBehavior
{
MyDomainContext _Ctx;
public CustomHeaderEndpointBehavior(MyDomainContext ctx)
{
this._Ctx = ctx;
}
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { }
public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)
{
clientRuntime.MessageInspectors.Add(new CustomHeaderMessageInspector(this._Ctx));
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.EndpointDispatcher endpointDispatcher) { }
public void Validate(ServiceEndpoint endpoint) { }
}
public class CustomHeaderMessageInspector : IClientMessageInspector
{
MyDomainContext _Ctx;
public CustomHeaderMessageInspector(MyDomainContext ctx)
{
this._Ctx = ctx;
}
public void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply, object correlationState) {}
public object BeforeSendRequest(ref System.ServiceModel.Channels.Message request, IClientChannel channel)
{
string myHeaderName = "X-Foo-Bar";
string myheaderValue = this._Ctx.HeaderValue;
HttpRequestMessageProperty property = (HttpRequestMessageProperty)request.Properties[HttpRequestMessageProperty.Name];
property.Headers[myHeaderName] = myheaderValue;
return null;
}
}
I found that I was unable to return collections from my JAX-WS Web Service.
I appreciate that the Java Collections API may not be supported by all clients, so I switched to return an array, but I can't seem to do this either.
I've set up my web service as follows:
#WebService
public class MyClass {
public ReturnClass[] getArrayOfStuff() {
// extremely complex business logic... or not
return new ReturnClass[] {new ReturnClass(), new ReturnClass()};
}
}
And the ReturnClass is just a POJO. I created another method that returns a single instance, and that works. It just seems to be a problem when I use collections/arrays.
When I deploy the service, I get the following exception when I use it:
javax.xml.bind.MarshalException - with linked exception:
[javax.xml.bind.JAXBException: [LReturnClass; is not known to this context]
Do I need to annotate the ReturnClass class somehow to make JAX-WS aware of it?
Or have I done something else wrong?
I am unsure of wheter this is the correct way to do it, but in one case where I wanted to return a collection I wrapped the collection inside another class:
#WebService
public class MyClass {
public CollectionOfStuff getArrayOfStuff() {
return new CollectionOfStuff(new ReturnClass(), new ReturnClass());
}
}
And then:
public class CollectionOfStuff {
// Stuff here
private List<ReturnClass> = new ArrayList<ReturnClass>();
public CollectionOfStuff(ReturnClass... args) {
// ...
}
}
Disclaimer: I don't have the actual code in front of me, so I guess my example lacks some annotations or the like, but that's the gist of it.
Is it possible for me to connect to my own data provide via WCF RIA services?
I've created a small datalayer that connnects to DynamicAX datasource. I would like to use Silverlight 4 & RIA service to access that datalayer.
At it's most basic -I've done the following...
1) I've added an empty domainclass to the webproject and in that class I created a simple method to return a string...
[EnableClientAccess()]
public class ProjectService : DomainService
{
public string TestViaRIA()
{
return "Hello!";
}
}
2) I then added reference to the web project in my silvelight class and created a bit of code to try and invoke the method...
using ProjectApp.Web;
namespace ProjectApp.Views
{
public partial class ProjectControl : UserControl
{
public ProjectControl()
{
InitializeComponent();
ProjectContext ctx = new ProjectContext();
var x = ctx.TestViaRIA();
testTextBox.Text = x.ToString();
}
}
}
the returned value is "{System.ServiceModel.DomainServices.Client.InvokeOperation}".
I'm obviously doing something wrong here and I would appreciate some guidance on how I can achive this.
Add [Invoke] attribute on the method