handling faults in WCF

最新推荐文章于 2020-04-21 18:08:35 发布

转载最新推荐文章于 2020-04-21 18:08:35 发布 · 750 阅读

文章标签：

#wcf #string #interface #random #class #report

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本文探讨了如何将.NET框架中的异常转换为WCF故障并发送给客户端，包括错误处理概述、定义及指定故障等内容。通过示例代码展示了如何使用FaultContractAttribute来指定特定类型的故障。

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Specifying and handling faults in WCF

ms-help://MS.MSSDK.1033/MS.NETFX30SDK.1033/WCF_con/html/a9696563-d404-4905-942d-1e0834c26dea.htm

In this article, it is discussed how and when to convert DotNet exceptions to WCF faults and sent them to the clients. The folowing main contents included:

Error handling overview
Defining and specifying faults

namespace Microsoft.WCF.Documentation
{
  [ServiceContract(Namespace="http://microsoft.wcf.documentation")]
  public interface ISampleService{
    [OperationContract]
    [FaultContractAttribute(
      typeof(GreetingFault),
      Action="http://www.contoso.com/GreetingFault",
      ProtectionLevel=ProtectionLevel.EncryptAndSign
      )]
    string SampleMethod(string msg);
  }

  [DataContractAttribute]
  public class GreetingFault
  {
    private string report;

    public GreetingFault(string message)
    {
      this.report = message;
    }

    [DataMemberAttribute]
    public string Message
    {
      get { return this.report; }
      set { this.report = value; }
    }
  }

  class SampleService : ISampleService
  {
  #region ISampleService Members

  public string  SampleMethod(string msg)
  {
    Console.WriteLine("Client said: " + msg);
    // Generate intermittent error behavior.
    Random rand = new Random(DateTime.Now.Millisecond);
    int test = rand.Next(5);
    if (test % 2 != 0)
      return "The service greets you: " + msg;
    else
      throw new FaultException<GreetingFault>(new GreetingFault("A Greeting error occurred. You said: " + msg));
  }

  #endregion
  }
}