继承WCF中的通用契约

Question

更多WCF问题...... :)

我的所有工作流程都实现了相同的3种方法.经过大量的复制和粘贴后,我决定让它们从相同的界面继承:

[ServiceContract(Namespace = "http://schema.company.com/messages/")]
public interface IBasicContract<TRequest, TResponse>
  where TRequest : class
  where TResponse : class
{
  [OperationContract(Name = "GetReport",
    Action = "http://schema.company.com/messages/GetReport",
    ReplyAction = "http://schema.company.com/messages/GetReportResponse")]
  TResponse GetReport(TRequest inquiry);

  [OperationContract(Name = "GetRawReport",
    Action = "http://schema.company.com/messages/GetRawReport",
    ReplyAction = "http://schema.company.com/messages/GetRawReportResponse")]
  string GetRawReport(string guid);

  [OperationContract(Name = "GetArchiveReport",
    Action = "http://schema.company.com/messages/GetArchiveReport",
    ReplyAction = "http://schema.company.com/messages/GetArchiveReportResponse")]
  TResponse GetArchiveReport(string guid);
}

我还决定创建服务客户端的通用实现:

public class BasicSvcClient<TRequest, TResponse> : ClientBase<IBasicContract<TRequest, TResponse>>, IBasicContract<TRequest, TResponse>
  where TRequest : class
  where TResponse : class
{
  public BasicSvcClient()
  {
  }

  public BasicSvcClient(string endpointConfigurationName) :
    base(endpointConfigurationName)
  {
  }

  public BasicSvcClient(string endpointConfigurationName, string remoteAddress) :
    base(endpointConfigurationName, remoteAddress)
  {
  }

  public BasicSvcClient(string endpointConfigurationName, EndpointAddress remoteAddress) :
    base(endpointConfigurationName, remoteAddress)
  {
  }

  public BasicSvcClient(Binding binding, EndpointAddress remoteAddress) :
    base(binding, remoteAddress)
  {
  }

  public TResponse GetReport(TRequest inquiry)
  {
    return Channel.GetReport(inquiry);
  }

  public string GetRawReport(string guid)
  {
    return Channel.GetRawReport(guid);
  }

  public TResponse GetArchiveReport(string guid)
  {
    return Channel.GetArchiveReport(guid);
  }
}

问题是当我尝试使用它时:

using (var client = new BasicSvcClient<TRequest, TResponse>())
{
  var response = client.GetReport(inquiry);

  context.Response.ContentType = "text/xml";
  context.Response.Write(response.AsXML());
}

我总是得到一个错误,说它无法找到合同IBasicContract的配置,因为.NET使用的奇怪语法:

找不到引用合同'BasicWorkflow.IBasicContract`2的默认端点元素...

我试过这样做:

using (var client = new BasicSvcClient<TRequest, TResponse>("myConfig"))

它没有帮助 - 它仍然在寻找特定的合同.

我知道ServiceContract属性有一个ConfigurationName参数,但我不能在编译时使用它,因为我有很多工作流程,我从同一个程序调用(因此有很多配置项).有没有办法在运行时设置ConfigurationName？我认为这是ClientBase构造函数应该做的,但显然不是.

[编辑]这是.config文件中的端点,我不相信它在这种情况下非常有用:

<endpoint address="https://localhost/services/Contract.svc"
    binding="basicHttpBinding"
    bindingConfiguration="httpsDataEndpoint"
    contract="IContract" name="IContractSvc" />

[编辑2]好的......我发现了一种有效的方法,尽管我仍然不满意它:

using (var wf = new BasicSvcClient<TRequest, TResponse>(
  new BasicHttpBinding("httpsDataEndpoint"),
  new EndpointAddress("https://localhost/services/Contract.svc")))

我现在唯一的问题是我更愿意从.config文件中检索端点地址(使用实际的合同名称,如IContract).有谁可以帮我这个部分？

[Edit3]终于找到了完整的解决方案:)万岁反射器!

var cf = (ClientSection) ConfigurationManager.GetSection("system.serviceModel/client");
foreach (ChannelEndpointElement endpoint in cf.Endpoints)
{
  if (endpoint.Name != "ContractSvc")
    continue;

  using (var wf = new BasicSvcClient<TRequest, TResponse>(
    new BasicHttpBinding("httpsDataEndpoint"),
    new EndpointAddress(endpoint.Address.ToString())))
  {
      //... call wf.GetReport()
  }
  break;
}

Answer 1

“.NET 使用的奇怪语法”实际上是运行时绑定到特定类型的泛型类型的类型名称。Typename`n[[Type],...] 其中 n 表示泛型类型中包含的类型参数的数量。

那么您的端点配置是什么样的？