返回 JSON/XML 对象的 WCF 方法不起作用 [英] WCF method returning JSON / XML objects not working

问题描述

我是 WCF 的新手，我试图使用 VS 2010 和下面提供的代码构建一个示例应用程序

I was new to WCF, i was trying to build a sample application using VS 2010 and code provided below

IProductService.cs

IProductService.cs

[ServiceContract]
public interface IProductService
{
    [OperationContract]
    [WebGet(ResponseFormat = WebMessageFormat.Xml)]
    Products SelectAllProducts();
}
[DataContract]
public class Product
{
    [DataMember]
    public int ProductId { get; set; }
    [DataMember]
    public string Name { get; set; }
}
[CollectionDataContract]
public class Products : System.Collections.ObjectModel.Collection<Product>
{
}

ProductService.cs

ProductService.cs

public class ProductService : IProductService
{
    public Products SelectAllProducts()
    {
        var products = new Products();
        var prod = new Product();

        prod.ProductId = 1;
        prod.Name = "SAMSUNG";
        products.Add(prod);

        prod = new Product();
        prod.ProductId = 2;
        prod.Name = "RELIANCE";
        products.Add(prod);

        return products;
    }
}

http://localhost:1050/WCFService1/ProductService.svc/SelectAllProducts

Web.config

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>

如果尝试使用上面的 url 显示空白，有人可以帮助我吗???提前致谢..

and if try using the above url blank is getting displayed can some one help me ??? thanks in advance ..

推荐答案

我没有看到绑定 web.config 的服务.尝试添加如下行:

I don't see the service binding the web.config. Try adding line such as below:

<services>
     <service name="[Your Namespace].ProductService">
                <endpoint address="" binding="webHttpBinding" contract="[Your Namespace].IProductService" />
     </service>
</services>

为 REST WCF 服务使用 webHttpBinding 很重要.您还需要附加 webHttpBehavior - 这可以通过使用 WebServiceHostFactory 在您的 svc 文件中.例如，

Its important that you use webHttpBinding for REST WCF Services. Also you need to attach webHttpBehavior - that's possible by using WebServiceHostFactory in your svc file. For example,

<%@ServiceHost Language="C#" Service="[YourNameSpace].ProductService" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>

有关详细信息，请参见下文:

See below for more info:

http://saravananarumugam.wordpress.com/2011/03/04/simple-rest-implementation-with-webhttpbinding/
http://msdn.microsoft.com/en-us/magazine/dd315413.aspx

这篇关于返回 JSON/XML 对象的 WCF 方法不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！