Sunday, 27 May 2012

Silverlight Async Rest Wcf

Here is a simple example application that shows off:

  • “Aync” and “await” within Silverlight 5 in Visual Studio 11
  • Calling a simple RESTful WCF interface hosted with no config or svc file

image

image

image

MainPage.xaml.cs (code behind)

private async void LoadDataButton_Click(object sender, RoutedEventArgs e)
{
var request = new WebClient();
var uri = new Uri("http://localhost:5349/services/cars");
var jsonString = await request.DownloadStringTaskAsync(uri);

using (var stream = new MemoryStream(Encoding.Unicode.GetBytes(jsonString.ToCharArray())))
{
var serializer = new DataContractJsonSerializer(typeof (Car[]));
var cars = (Car[]) serializer.ReadObject(stream);
CarsListBox.ItemsSource = cars;
}
}

Service Interface

[ServiceContract]
interface IService<T>
{
[OperationContract]
IList<T> GetAll();

[OperationContract]
T Get(string id);

[OperationContract]
void Insert(T entity);

[OperationContract]
void Update(string id, T entity);

[OperationContract]
void Delete(string id);
}

Service Implementation

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class CarService : IService<Car>
{
private readonly IRepository<Car> _repo;

public CarService()
{
_repo = new FakeCarRepository();
}

public CarService(IRepository<Car> repo)
{
_repo = repo;
}

[WebGet(UriTemplate = "Cars", ResponseFormat = WebMessageFormat.Json)]
public IList<Car> GetAll()
{
var cars = _repo.GetAll();
return cars;
}

[WebGet(UriTemplate = "Car/{id}", ResponseFormat = WebMessageFormat.Json)]
public Car Get(string id)
{
var car = _repo.GetById(id);
return car;
}

[WebInvoke(UriTemplate = "Car", Method = "POST")]
public void Insert(Car car)
{
_repo.Insert(car);
}

[WebInvoke(UriTemplate = "Car/{id}", Method = "PUT")]
public void Update(string id, Car car)
{
_repo.Update(car);
}

[WebInvoke(UriTemplate = "Car/{id}", Method = "DELETE")]
public void Delete(string id)
{
_repo.Delete(id);
}
}

DTO

[DataContract]
public class Car
{
[DataMember]
public int Id { get; set; }
[DataMember]
public string Make { get; set; }
[DataMember]
public string Model { get; set; }
[DataMember]
public int Year { get; set; }
}

How come no config or svc file?


Global.asax

public class Global : HttpApplication
{
protected void Application_Start(object sender, EventArgs e)
{
RouteTable.Routes.Add(new ServiceRoute("services", new WebServiceHostFactory(), typeof(CarService)));
}
}

Web.config

<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
<standardEndpoints>
<webHttpEndpoint>
<standardEndpoint name="" helpEnabled="true" automaticFormatSelectionEnabled="true"/>
</webHttpEndpoint>
</standardEndpoints>
</system.serviceModel>
</configuration>

Source


http://stevenhollidge.com/blog-source-code/SilverlightAsyncRestWcf.zip

1 comment:

  1. Find the latest used and new cars for sale.
    Great used car deals and prices.
    More here cars for sale USA

    ReplyDelete